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Ojha, N. ; Naja, M. ; Sarangi, T. ; Kumar, R. ; Bhardwaj, P. ; Lal, S. ; Venkataramani, S. ; Sagar, R. ; Kumar, A. ; Chandola, H. C. (2014) On the processes influencing the vertical distribution of ozone over the central Himalayas: analysis of yearlong ozonesonde observations Atmospheric Environment, 88 . pp. 201-211. ISSN 1352-2310

Dumka, U. C. ; Tripathi, S. N. ; Misra, Amit ; Giles, D. M. ; Eck, T. F. ; Sagar, Ram ; Holben, B. N. (2014) Latitudinal variation of aerosol properties from Indo-Gangetic Plain to central Himalayan foothills during TIGERZ campaign Journal of Geophysical Research: Atmospheres, 119 (8). pp. 4750-4769. ISSN 0148-0227

Bhatt, Himali ; Pandey, J. C. ; Singh, K. P. ; Sagar, Ram ; Kumar, Brijesh (2014) X-ray flares observed from six young stars located in the region of star clusters NGC 869 and IC 2602 Journal of Astrophysics and Astronomy, 35 (1). pp. 39-54. ISSN 0250-6335

Sarangi, Tapaswini ; Naja, Manish ; Ojha, N. ; Kumar, R. ; Lal, S. ; Venkataramani, S. ; Kumar, A. ; Sagar, R. ; Chandola, H. C. (2014) First simultaneous measurements of ozone, CO, and NO_y at a high-altitude regional representative site in the central Himalayas Journal of Geophysical Research: Atmospheres, 119 (3). pp. 1592-1611. ISSN 0148-0227

Yadav, R. K. S. ; Leonova, S. I. ; Sagar, R. ; Glushkova, E. V. (2014) Multicolour CCD photometric study of galactic star clusters SAI 63 and SAI 75 Journal of Astrophysics and Astronomy, 35 (2). pp. 143-156. ISSN 0250-6335

Bhatt, Himali ; Pandey, J. C. ; Singh, K. P. ; Sagar, Ram ; Kumar, Brijesh (2013) X-ray observations of eight young open star clusters: I. Membership and X-ray luminosity Journal of Astrophysics and Astronomy, 34 (4). pp. 393-429. ISSN 0250-6335

Goyal, A. ; Gopal-Krishna, ; Wiita, P. J. ; Stalin, C. S. ; Sagar, R. (2013) Improved characterization of intranight optical variability of prominent AGN classes Monthly Notices of the Royal Astronomical Society, 435 (2). pp. 1300-1312. ISSN 0035-8711

Bose, S. ; Kumar, B. ; Sutaria, F. ; Kumar, B. ; Roy, R. ; Bhatt, V. K. ; Pandey, S. B. ; Chandola, H. C. ; Sagar, R. ; Misra, K. ; Chakraborti, S. (2013) Supernova 2012aw - a high-energy clone of archetypal type IIP SN 1999em Monthly Notices of the Royal Astronomical Society, 433 (3). pp. 1871-1891. ISSN 0035-8711

Kumar, B. ; Pandey, S. B. ; Sahu, D. K. ; Vinko, J. ; Moskvitin, A. S. ; Anupama, G. C. ; Bhatt, V. K. ; Ordasi, A. ; Nagy, A. ; Sokolov, V. V. ; Sagar, R. (2013) Light curve and spectral evolution of the type IIb supernova 2011fu Monthly Notices of the Royal Astronomical Society, 431 (1). pp. 308-321. ISSN 0035-8711

Balona, L. A. ; Joshi, S. ; Joshi, Y. C. ; Sagar, R. (2013) Pulsation and rotation of Kepler stars in the NGC 6866 field Monthly Notices of the Royal Astronomical Society, 429 (2). pp. 1466-1478. ISSN 0035-8711

Goyal, Arti ; Mhaskey, Mukul ; Gopal-Krishna, * ; Wiita, Paul J. ; Stalin, C. S. ; Sagar, Ram (2013) On the photometric error calibration for the differential light curves of point-like active galactic nuclei Journal of Astrophysics and Astronomy, 34 (3). pp. 273-296. ISSN 0250-6335

Yadav, R. K. S. ; Sariya, D. P. ; Sagar, R. (2013) Proper motions and membership probabilities of stars in the region of open cluster NGC 3766 Monthly Notices of the Royal Astronomical Society, 430 (4). pp. 3350-3358. ISSN 0035-8711

Roy, R. ; Kumar, B. ; Maund, J. R. ; Schady, P. ; Olivares, E. F. ; Malesani, D. ; Leloudas, G. ; Nandi, S. ; Tanvir, N. ; Milisavljevic, D. ; Sagar, R. (2013) SN 2007uy - metamorphosis of an aspheric type Ib explosion Monthly Notices of the Royal Astronomical Society, 434 (3). pp. 2032-2050. ISSN 0035-8711

Stepp, Larry M. ; Sagar, Ram ; Kumar, Brijesh ; Omar, Amitesh ; Pandey, A. K. ; Gilmozzi, Roberto ; Hall, Helen J. (2012) New optical telescope projects at Devasthal Observatory Proceedings of SPIE, 8444 . 8444T1, 12 pages. ISSN 0277-786X

Bhatt, Himali ; Ram Sagar, ; Pandey, J. C. (2012) Stellar contents and star formation in the young cluster Stock 18 New Astronomy, 17 (2). pp. 160-166. ISSN 1384-1076

Resmi, L. ; Misra, K. ; Jóhannesson, G. ; Castro-Tirado, A. J. ; Gorosabel, J. ; Jelínek, M. ; Bhattacharya, D. ; Kubánek, P. ; Anupama, G. C. ; Sota, A. ; Sagar, R. (2012) Comprehensive multiwavelength modelling of the afterglow of GRB 050525A Monthly Notices of the Royal Astronomical Society, 427 (1). pp. 288-297. ISSN 0035-8711

Ram Sagar, ; Omar, Amitesh ; Kumar, Brijesh ; Gopinathan, Maheswar ; Pandey, Shashi B. ; Bangia, Tarun ; Pant, Jayshreekar ; Shukla, Vishal ; Yadava, Shobhit (2011) The new 130-cm optical telescope at Devasthal, Nainital Current Science, 101 (8). pp. 1020-1023. ISSN 0011-3891

Gopal-Krishna, ; Goyal, Arti ; Joshi, S. ; Karthick, Chrisphin ; Sagar, R. ; Wiita, Paul J. ; Anupama, G. C. ; Sahu, D. K. (2011) Rapid optical variability of TeV blazars Monthly Notices of the Royal Astronomical Society, 416 (1). pp. 101-117. ISSN 0035-8711

Dumka, U. C. ; Krishna Moorthy, K. ; Tripathi, S. N. ; Hegde, P. ; Sagar, Ram (2011) Altitude variation of aerosol properties over the Himalayan range inferred from spatial measurements Journal of Atmospheric and Solar-Terrestrial Physics, 73 (13). pp. 1741-1761. ISSN 1364-6826

Yadav, R. K. S. ; Glushkhova, E. V. ; Sariya, Devesh Path ; Porokhova, A. V. ; Kumar, Brijesh ; Ram Sagar, (2011) Optical photometric study of the open clusters Koposov 12, Koposov 53 and Koposov 77 Monthly Notices of the Royal Astronomical Society, 414 (1). pp. 652-658. ISSN 0035-8711

Bangia, T. ; Agarwal, P. K. ; Kumar, A. ; Singh, S. K. ; Sagar, R. (2011) Opto-mechanical design, analysis and economical manufacture of a large aperture LIDAR receiver telescope Journal of Engineering and Technology Research, 3 (6). pp. 180-196. ISSN 2006-9790

Roy, Rupak ; Kumar, Brijesh ; Moskvitin, Alexander S. ; Benetti, Stefano ; Fatkhullin, Timur A. ; Kumar, Brajesh ; Misra, Kuntal ; Bufano, Filomena ; Martin, Ralph ; Sokolov, Vladimir V. ; Pandey, S. B. ; Chandola, H. C. ; Ram Sagar, (2011) SN 2008gz – most likely a normal Type IIP even Monthly Notices of the Royal Astronomical Society, 414 (1). pp. 167-183. ISSN 0035-8711

Bangia, Tarun ; Omar, Amitesh ; Ram Sagar, ; Kumar, Ashish ; Bhattacharjee, Samaresh ; Reddy, Arjun ; Phanikumar, (2011) Study of atmospheric aerosols over the central Himalayan region using a newly developed Mie light detection and ranging system: preliminary results Journal of Applied Remote Sensing, 5 . 053521. ISSN 1931-3195

Bangia, T. ; Kumar, A. ; Sagar, R. ; Agarwal, P. K. ; Singh, S. K. (2011) Development of Mie LIDAR system and initial cloud observations over Central Himalayan region Scientific Research and Essays, 6 (4). pp. 896-907. ISSN 1992-2248

Wiita, P. J. ; Sagar, R. ; et., al (2011) Intranight optical variability of core dominated quasars and TeV blazars Bulletin of the American Astronomical Society, 43 . p. 218. ISSN 0002-7537

Pandey, J. C. ; Medhi, B. J. ; Sagar, R. (2011) Optical polarimetry and photometry of young sun-like star LO peg Proceedings of The Physics of Sun and Star Spots, 273 . pp. 455-459.

Roy, R. ; Kumar, B. ; Sagar, R. ; et., al. (2011) SN 2008 in- bridging the gap between normal and faint supernovae of type IIP The Astronomical Journal, 736 (2). p. 76. ISSN 0004-6256

Bhatt, Himali ; Pandey, J. C. ; Kumar, Brijesh ; Sagar, Ram ; Singh, K. P. (2010) X-ray emission from O-type stars: DH Cep and HD 97434 New Astronomy, 15 (8). pp. 755-759. ISSN 1384-1076

Dumka, U. C. ; Krishnamoorthy, K. ; Kumar, Rajesh ; Hegde, P. ; Ram Sagar, ; Pant, P. ; Singh, Narendra ; Babu, S. Suresh (2010) Characteristics of aerosol black carbon mass concentration over a high altitude location in the central Himalayas from multi-year measurements Atmospheric Research, 96 (4). pp. 510-521. ISSN 0169-8095

Pandey, A. K. ; Sandhu, T. S. ; Sagar, R. ; Battinelli, P. (2010) Integrated parameters of star clusters: a comparison of theory and observations Monthly Notices of the Royal Astronomical Society, 403 (3). pp. 1491-1506. ISSN 0035-8711

Medhi, Biman J. ; Maheswar, G. ; Pandey, J. C. ; Tamura, Motohide ; Sagar, R. (2010) Polarization towards the young open cluster NGC 6823 Monthly Notices of the Royal Astronomical Society, 403 (3). pp. 1577-1591. ISSN 0035-8711

Joshi, Y. C. ; Narasimha, D. ; Pandey, A. K. ; Sagar, R. (2010) Nainital Microlensing Survey-detection of short period Cepheids in the disk of M31 Astronomy & Astrophysics, 512 (A66). pp. 1-9. ISSN 0004-6361

Bhatt, Himali ; Pandey, J. C. ; Kumar, Brijesh ; Singh, K. P. ; Sagar, Ram (2010) X-ray emission characteristics of two Wolf-Rayet binaries: V444 Cyg and CD Cru Monthly Notices of the Royal Astronomical Society, 402 (3). pp. 1767-1779. ISSN 0035-8711

Goyal, Arti ; Gopal-Krishna, ; Joshi, S. ; Sagar, R. ; Wiita, Paul J. ; Anupama, G. C. ; Sahu, D. K. (2010) Optical variability of radio-intermediate quasars Monthly Notices of the Royal Astronomical Society, 401 (4). 2622-2634,. ISSN 0035-8711

Sagar, R. ; Kumar, Brijesh ; Omar, A. ; Pandey, A. K. (2010) New initiatives in optical astronomy at ARIES Interstellar Matter and Star Formation: A Multi-wavelength Perspective, ASI Conference Series, 1 . pp. 203-210.

Goyal, Arti ; Gopal-Krishna, ; Anupama, G. C. ; Sahu, D. K. ; Sagar, R. ; Britzen, S. ; Karouzos, M. ; Aller, M. F. ; Aller, H. D. (2009) Unusual optical quiescence of the classical BL lac object PKS 0735+178 on intranight time-scale Monthly Notices of the Royal Astronomical Society, 399 (3). pp. 1622-1632. ISSN 0035-8711

Raiteri, C. M. ; Sagar, R. ; et., al. (2009) WEBT multiwavelength monitoring and XMM-Newton observations of BL Lacertae in 2007-2008 Astronomy & Astrophysics, 507 (2). pp. 769-779. ISSN 0004-6361

Kamble, Atish ; Misra, Kuntal ; Bhattacharya, D. ; Ram Sagar, (2009) Optical observations of GRB 050401 afterglow : a case for double-jet model Monthly Notices of the Royal Astronomical Society, 394 (1). pp. 214-220. ISSN 0035-8711

Misra, K. ; Sagar, R. (2009) An insight into the progenitors of gamma ray bursts from the optical afterglow observations Current Science, 96 (3). pp. 347-356. ISSN 0011-3891

Goyal, A. ; Sagar, R. ; et., al (2009) Prolonged intranight optical quiescence of the classical BL Lac Object PKS 0735+17 Proceedings of the Conference held 8-12 December 2008, at National Centre for Radio Astrophysics . p. 176.

Dumka, U. C. ; Pant, P. (2009) Retrieval of columnar aerosol size distributions from spectral attenuation measurements over Central Himalayas Aerosol and Air Quality Research, 9 . pp. 344-351. ISSN 1680-8584

Raiteri, C. M. ; Sagar, R. ; et., al. (2008) A new activity phase of the blazar 3C 454.3 Astronomy & Astrophysics, 491 (3). pp. 755-766. ISSN 0004-6361

Yadav, R. K. S. ; Kumar, Brijesh ; Subramaniam, A. ; Ram Sagar, ; Mathew, Blesson (2008) Optical and near-infrared photometric study of the open cluster NGC 637 and 957 Monthly Notices of the Royal Astronomical Society, 390 (3). pp. 985-996. ISSN 0035-8711

Goldman, B. ; Sagar, R. ; et., al. (2008) CLOUDS search for variability in brown dwarf atmospheres Astronomy & Astrophysics, 487 (1). pp. 277-292. ISSN 0004-6361

Medhi, Biman J. ; Maheswar, G. ; Pandey, J. C. ; Kumar, T. S. ; Ram Sagar, (2008) Optical polarimetric study of open clusters: distribution of interstellar matter towards NGC 654 Monthly Notices of the Royal Astronomical Society, 388 (1). pp. 105-116. ISSN 0035-8711

Dumka, U. C. ; Krishna Moorthy, K. ; Pant, P. ; Hegde, P. ; Ram Sagar, ; Pandey, K. (2008) Physical and optical characteristics of atmospheric aerosols during ICARB at Manora Peak, Nainital: a sparsely inhabited, high-altitude location in the Himalayas Journal of Earth System Science, 117 (S1). pp. 399-405. ISSN 0253-4126

Yadav, R. K. S. ; Bedin, L. R. ; Piotto, G. ; Anderson, J. ; Cassisi, S. ; Villanova4, S. ; Platais, I. ; Pasquini, L. ; Momany, Y. ; Sagar, R. (2008) Ground-based CCD astrometry with wide-field imagers II. A star catalog for M 67: WFI@2.2 m MPG/ESO astrometry, FLAMES@VLT radial velocities Astronomy & Astrophysics, 484 (2). pp. 609-620. ISSN 0004-6361

Kaur, Ramanpreet ; Paul, Biswajit ; Kumar, Brijesh ; Ram Sagar, (2008) Multiwavelength study of the transient X-ray binary IGR J01583+6713 Monthly Notices of the Royal Astronomical Society, 386 (4). pp. 2253-2261. ISSN 0035-8711

Kumar, B. ; Sagar, R. ; Melnick, J. (2008) CCD photometric and mass function study of nine young Large Magellanic Cloud star clusters Monthly Notices of the Royal Astronomical Society, 386 (3). pp. 1380-1397. ISSN 0035-8711

Dumka, U. C. ; Krishna Moorthy, K. ; Satheesh, S. K. ; Ram Sagar, ; Pant, P. (2008) Short-period modulations in aerosol optical depths over the central Himalayas: role of mesoscale processes Journal of Applied Meteorology and Climatology, 47 (5). pp. 1467-1475. ISSN 1558-8432

Kaur, Ramanpreet ; Paul, Biswajit ; Kumar, Brijesh ; Ram Sagar, (2008) A study of the long-term evolution of quasi-periodic oscillations in the accretion-powered X-ray pulsar 4U 1626-67 The Astrophysical Journal, 676 (2). pp. 1184-1188. ISSN 0004-637X

Goyal, A. ; Gopal-Krishna, ; Sagar, R. ; Anupama, G. C. ; Sahu, D. K. (2008) Comparative intra-night optical variability of high and low polarization quasars with dominant radio cores Bulletin of the Astronomical Society of India . p. 73. ISSN 0304-9523

Kamble, A. ; Resmi, L. ; Misra, K. ; Bhattacharya, D. ; Sagar, R. (2008) GRB 050319 afterglow : wind to ISM transition in view? Bulletin of the Astronomical Society of India . p. 36. ISSN 0304-9523

Sharma, Saurabh ; Pandey, A. K. ; Ogura, K. ; Aoki, T. ; Pandey, Kavita ; Sandhu, T. S. ; Sagar, R. (2008) Mass functions and photometric binaries in nine open clusters The Astronomical Journal, 135 (5). pp. 1934-1945. ISSN 0004-6256

Misra, K. ; Chandra, P. ; Bhattacharya, D. ; Sagar, R. (2008) Optical and radio studies of a type IIP Supernova SN 2004et Bulletin of the Astronomical Society of India, 25 . pp. 69-70. ISSN 0304-9523

Kaur, R. ; Kumar, B. ; Paul, B. ; Sagar, R. (2008) Optical photometric observations of the Be/X-ray binary Proceedings: The Astronomer's Telegram . No pp. given.

Kaur, R. ; Paul, B. ; Raichur, H. ; Sagar, R. (2008) Quasi periodic oscillations in XTE J0111.2-7317, highest frequency among the HMXB pulsar Bulletin of the Astronomical Society of India . p. 51. ISSN 0304-9523

Sharma, S. ; Pandey, A. K. ; Ojha, D. K. ; Ghosh, S. K. ; Maheswar, G. ; Bhatt, B. C. ; Sagar, R. (2008) Star formation in young open cluster NGC 1893 Bulletin of the Astronomical Society of India, 25 . p. 46. ISSN 0304-9523

Castro-Tirado, A. J. ; Sagar, R. ; et., al. (2007) The dark nature of GRB 051022 and its host galaxy Astronomy & Astrophysics, 475 (1). pp. 101-107. ISSN 0004-6361

Uddin, Wahab ; Joshi, B. ; Kumar, T. S. ; Sharma, S. ; Sagar, R. (2007) Observations of total solar eclipse of 29 March 2006 and related atmospheric measurements Current Science, 93 (7). pp. 957-959. ISSN 0011-3891

Misra, Kuntal ; Pooley, Dave ; Chandra, Poonam ; Bhattacharya, D. ; Ray, Alak K. ; Ram Sagar, ; Lewin, Walter H. G. (2007) Type IIP supernova SN 2004et: a multiwavelength study in X-ray, optical and radio Monthly Notices of the Royal Astronomical Society, 381 (1). pp. 280-292. ISSN 0035-8711

Sharma, Saurabh ; Pandey, A. K. ; Ojha, D. K. ; Chen, W. P. ; Ghosh, S. K. ; Bhatt, B. C. ; Maheswar, G. ; Sagar, Ram (2007) Star formation in young cluster NGC 1893 Monthly Notices of the Royal Astronomical Society, 380 (3). pp. 1141-1160. ISSN 0035-8711

Medhi, Biman J. ; Maheswar, G. ; Brijesh, K. ; Pandey, J. C. ; Kumar, T. S. ; Sagar, R. (2007) Broad-band optical polarimetric study of IC 1805 Monthly Notices of the Royal Astronomical Society, 378 (3). pp. 881-887. ISSN 0035-8711

Pandey, A. K. ; Sharma, S. ; Upadhyay, K. ; Ogura, K. ; Sandhu, T. S. ; Mito, H. ; Sagar, R. (2007) Stellar contents of two intermediate age clusters: NGC 1912 and NGC 1907 Publications of the Astronomical Society of Japan, 59 (3). pp. 547-558. ISSN 0004-6264

Kaur, Ramanpreet ; Paul, Biswajit ; Raichur, Harsha ; Ram Sagar, (2007) Quasi-periodic oscillations in XTE J0111.2-7317: highest frequency among the HMXB pulsars The Astrophysical Journal, 660 (2). pp. 1409-1412. ISSN 0004-637X

Misra, K. ; Bhattacharya, D. ; Sahu, D. K. ; Sagar, R. ; Anupama4, G. C. ; Castro-Tirado5, A. J. ; Guziy, S. S. ; Bhatt, B. C. (2007) Optical observations of GRB 060124 afterglow: a case for an injection break Astronomy &Astrophysics, 464 (3). pp. 903-908. ISSN 0004-6361

Pandey, J. C. ; Singh, K. P. ; Sagar, R. ; Drake, S. A. (2007) Multiwavelength studies of five chromospherically active stars Proceedings of the conference held 1-5 November, 2005 in Sejong University . pp. 74-79.

Joshi, S. ; Girish, V. ; Martinez, P. ; Kurtz, D. W. ; Sagar, R. ; Seetha, S. ; Mary, D. L. ; Ashoka, B. N. (2007) The Nainital-cape survey: contributions to the asteroseismology of CP stars Communications in Asteroseismology, 150 . pp. 79-80. ISSN 1021-2043

Misra, K. ; Bhattacharya, D. ; Sahu, D. K. ; Sagar, R. ; Anupama, G. C. ; Castro-tirado, A. J. ; Guziy, S. S. ; Bhatt, B. C. (2007) Optical observations of GRB 060124 afterglow: a case for an injection break Astrophysics and Astronomy . 903 - 908. ISSN 0004-6361

Ciprini, S. ; Sagar, R. ; et., al. (2007) Prominent activity of the blazar OJ 287 in 2005. XMM-Newton and multiwavelength observations Memorie della Societa Astronomica Italiana, 78 (4). pp. 741-744. ISSN 0037-8720

Hegde, P. ; Pant, P. ; Naja, M. ; Dumka, U. C. ; Sagar, R. (2007) South Asian dust episode in June 2006: Aerosol observations in the central Himalayas Geophysical Research Letters, 34 . L23802_1-L23802_5. ISSN 0094-8276

Ram Sagar, (2007) A modern 3.6 meter new technology optical telescope as a major national initiative in Astrophysics National Academy Science Letters (India), 30 (7-8). pp. 209-212. ISSN 0250-541X

Pant, P. ; Hegde, P. ; Dumka, U. C. ; Saha, A. ; Srivastava, M. K. ; Sagar, R. (2006) Aerosol characteristics at a high-altitude location during ISRO-GBP Land Campaign-II Current Science, 91 (8). pp. 1053-1061. ISSN 0011-3891

Saha, A. ; Pant, P. ; Dumka, U. C. ; Hegde, P. ; Srivastava, Manoj K. ; Sagar, R. (2006) Aerosol characteristics at a high-altitude station Nainital during the ISRO-GBP Land Campaign-II Current Science, 91 (8). pp. 1053-1061. ISSN 0011-3891

Joshi, S. ; Mary, D. L. ; Martinez, P. ; Kurtz, D. W. ; Girish, V. ; Seetha, S. ; Sagar, R. ; Ashoka, B. N. (2006) The Nainital-Cape Survey. II. Report for pulsation in five chemically peculiar A-type stars and presentation of 140 null results Astronomy & Astrophysics, 455 (1). pp. 303-313. ISSN 0004-6361

Stalin, C. S. ; Gopa-Krishna, ; Ram Sagar, ; Wiita, Paul J. ; Mohan, V. ; Pandey, A. K. (2006) Multiband optical monitoring of the blazars S5 0716+714 and BL lacertae Monthly Notices of the Royal Astronomical Society, 366 (4). pp. 1337-1345. ISSN 0035-8711

Ram Sagar, (2006) Aryabhatta Research Institute of Observational Sciences: reincarnation of a 50 year old State Observatory of Nainital Bulletin of the Astronomical Society of India, 34 (2). pp. 37-64. ISSN 0304-9523

Taori, A. ; Sunilkumar, S. V. ; Pant, P. ; Sagar, R. (2006) Emergence of a World class atmospheric science facility in the central Himalayan regions in Inida 36th COSPAR Scientific Assembly. Held 16 - 23 July 2006, in Beijing, China . p. 126.

Sharma, Saurabh ; Pandey, A. K. ; Ogura, K. ; Mito, H. ; Tarusawa, K. ; Sagar, R. (2006) Wide Field CCD photometry around nine open clusters The Astronomical Journal, 132 (4). pp. 1669-1691. ISSN 0004-6256

Pandey, J. C. ; Singh, K. P. ; Drake, S. A. ; Sagar, R. (2005) Unravelling the nature of HD 81032- a new RS CVn Binary Journal of Astrophysics and Astronomy, 26 (4). pp. 359-376. ISSN 0250-6335

Subramaniam, A. ; Sahu, D. K. ; Sagar, R. ; Vijitha, P. (2005) NGC 146: a young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars Astronomy & Astrophysics, 440 (2). pp. 511-522. ISSN 0004-6361

Pandey, J. C. ; Singh, K. P. ; Drake, S. A. ; Sagar, R. (2005) Optical and X-ray studies of chromospherically active stars: FR Cancri, HD 95559, and LO Pegasi The Astronomical Journal, 130 (3). pp. 1231-1246. ISSN 0004-6256

Resmi, L. ; Sagar, R. ; et., al. (2005) Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model Astronomy & Astrophysics, 440 (2). pp. 477-485. ISSN 0004-6361

Anandarao, B. G. ; Pal, S. ; Mondal, S. ; Nandi, A. ; Bhattacharyya, A. ; Mandal, S. ; Ram Sagar, ; Pandey, J. C. ; Pati, A. ; Saha, S. K. (2005) SS 433: results of a recent multiwavelength campaign Monthly Notices of the Royal Astronomical Society, 362 (3). pp. 957-965. ISSN 0035-8711

Misra, Kuntal ; Kamble, Atish P. ; Bhattacharya, D. ; Ram Sagar, (2005) Multiband optical photometry and bolometric light curve of the type la supernova 2004S Monthly Notices of the Royal Astronomical Society, 360 (2). pp. 662-668. ISSN 0035-8711

Joshi, Y. C. ; Pandey, A. K. ; Narasimha, D. ; Sagar, R. (2005) First microlensing candidate towards M 31 from the Nainital Microlensing Survey Astronomy & Astrophysics, 433 (3). pp. 787-795. ISSN 0004-6361

Pandey, A. K. ; Upadhyay, K. ; Ogura, K. ; Ram Sagar, ; Mohan, V. ; Mito, H. ; Bhatt, H. C. ; Bhatt, B. C. (2005) Stellar contents of two young open clusters: NGC 663 and 654 Monthly Notices of the Royal Astronomical Society, 358 (4). pp. 1290-1308. ISSN 0035-8711

Stalin, C. S. ; Gupta, Alok C. ; Gopal- Krishna, ; Wiita, Paul J. ; Ram Sagar, (2005) Intranight optical variability of BL Lacs, radio-quiet quasars and radio-loud quasars Monthly Notices of the Royal Astronomical Society, 356 (2). pp. 607-614. ISSN 0035-8711

Ram Sagar, ; Mary, David L. (2005) Facilities at ARIES for the Nainital-Cape Survey Journal of Astrophysics and Astronomy, 26 (2-3). pp. 339-347. ISSN 0250-6335

Pandey, S. B. ; Sagar, Ram ; Bhattacharya, D. (2005) Optical afterglow observations of GRB 021004 and GRB 030226 American Institute of Physics Conference Proceedings, 801 . pp. 137-138. ISSN 0094-243X

Misra, Kuntal ; Resmi, L. ; Pandey, S. B. ; Bhattacharya, D. ; Sagar, R. (2005) Optical observations and multiband modelling of the afterglow of GRB041006 : evidence of a hard electron energy spectrum Bulletin of the Astronomical Society of India, 33 (4). pp. 487-497. ISSN 0304-9523

Ram Sagar, ; Misra, Kuntal (2005) Optical observations of GRB afterglows from India Bulletin of the Astronomical Society of India, 33 (2). pp. 209-217. ISSN 0304-9523

Lata, Sneh ; Mohan, V. ; Sagar, R. (2004) CCD photometry of the galactic star clusters Be 15, Be 71 and King 1 Bulletin of the Astronomical Society of India, 32 (4). pp. 371-383. ISSN 0304-9523

Kumar, Brijesh ; Ram Sagar, ; Sanwal, B. B. ; Bessell, M. S. (2004) On the highly reddened members in six young galactic star clusters - a multiwavelength study Monthly Notices of the Royal Astronomical Society, 353 (3). pp. 991-1014. ISSN 0035-8711

Yadav, R. K. S. ; Ram Sagar, (2004) A comprehensive CCD photometric study of the open cluster NGC 2421 Monthly Notices of the Royal Astronomical Society, 351 (2). pp. 667-675. ISSN 0035-8711

Stalin, C. S. ; Gopal-Krishna, ; Ram Sagar, ; Wiita, Paul J. (2004) Intranight optical variability of radio-quiet and radio lobe-dominated quasars Monthly Notices of the Royal Astronomical Society, 350 (1). pp. 175-188. ISSN 0035-8711

Pandey, S. B. ; Sagar, R. ; Anupama, G. C. ; Bhattacharya, D. ; Sahu, D. K. ; Castro-Tirado5, A. J. ; Bremer, M. (2004) Early optical and millimeter observations of GRB 030226 afterglow Astronomy & Astrophysics, 417 (3). pp. 919-924. ISSN 0004-6361

Piskunov, A. E. ; Belikov, A. N. ; Kharchenko, N. V. ; Sagar, R. ; Subramaniam, A. (2004) On the determination of age and mass functions of stars in young open star clusters from the analysis of their luminosity functions Monthly Notices of the Royal Astronomical Society, 349 (4). pp. 1449-1463. ISSN 0035-8711

Yadav, R. K. S. ; Ram Sagar, (2004) UBV RI CCD photometric study of the open clusters Basel 4 and NGC 7067 Monthly Notices of the Royal Astronomical Society, 349 (4). pp. 1481-1492. ISSN 0035-8711

Lata, Sneh ; Mohan, V. ; Pandey, A. K. ; Ram Sagar, (2004) CCD photometry of the unstudied galactic star clusters Be 10, Be 67 and To 5 Bulletin of the Astronomical Society of India, 32 (1). pp. 59-74. ISSN 0304-9523

Ram Sagar, ; Stalin, C. S. ; Gopal-Krishna, ; Wiita, Paul J. (2004) Intranight optical variability of blazars Monthly Notices of the Royal Astronomical Society, 348 (1). pp. 176-186. ISSN 0035-8711

Joshi, Y. C. ; Pandey, A. K. ; Narasimha, D. ; Giraud-Heraud, Y. ; Sagar, R. ; Kaplan, J. (2004) Photometric study of two novae in M 31 Astronomy & Astrophysics, 415 (2). pp. 471-476. ISSN 0004-6361

Stalin, C. S. ; Gopal-Krishna, ; Ram Sagar, ; Wiita, Paul J. (2004) Optical variability properties of high luminosity AGN classes Journal of Astrophysics and Astronomy, 25 (1-2). pp. 1-55. ISSN 0250-6335

Castro-Tirado, A. J. ; Sagar, R. (2003) GRB 030227: the first multiwavelength afterglow of an INTEGRAL GRB Astronomy & Astrophysics, 411 (1). L315-L319. ISSN 0004-6361

Sandhu, T. S. ; Pandey, A. K. ; Sagar, R. (2003) Photometric binary content in intermediate/old open clusters Astronomy & Astrophysics, 408 (2). pp. 515-521. ISSN 0004-6361

Joshi, Santosh ; Girish, V. ; Ram Sagar, ; Kurtz, D. W. ; Martinez, P. ; Kumar, Brijesh ; Seetha, S. ; Ashoka, B. N. ; Zhou, A. (2003) Discovery of unusual pulsations in the cool, evolved Am stars HD 98851 and HD 102480 Monthly Notices of the Royal Astronomical Society, 344 (2). pp. 431-438. ISSN 0035-8711

Pandey, S. B. ; Anupama, G. C. ; Sagar, R. ; Bhattacharya, D. ; Castro-Tirado4, A. J. ; Sahu, D. K. ; Parihar, Padmakar ; Prabhu, T. P. (2003) The optical afterglow of the not so dark GRB 021211 Astronomy & Astrophysics, 408 (3). L21-L24. ISSN 0004-6361

Masetti, N. ; Sagar, R. ; et., al. (2003) Optical and near-infrared observations of the GRB020405 afterglow Astronomy & Astrophysics, 404 (2). pp. 465-481. ISSN 0004-6361

Gauba, G. ; Parthasarathy, M. ; Kumar, Brijesh ; Yadav, R. K. S. ; Sagar, R. (2003) Photometry and low resolution spectroscopy of hot post-AGB candidates Astronomy & Astrophysics, 404 (1). pp. 305-315. ISSN 0004-6361

Joshi, Y. C. ; Pandey, A. K. ; Narasimha, D. ; Sagar, R. ; Giraud-Héraud, Y. (2003) Identification of 13 Cepheids and 333 other variables in M 31 Astronomy & Astrophysics, 402 (1). pp. 113-123. ISSN 0004-6361

Pandey, S. B. ; Anupama, G. C. ; Sagar, R. ; Bhattacharya, D. ; Sahu, D. K. ; Pandey, J. C. (2003) A flattening in the optical light curve of SN 2002ap Monthly Notices of the Royal Astronomical Society, 340 (2). pp. 375-380. ISSN 0035-8711

Gopal-Krishna, ; Stalin, C. S. ; Ram Sagar, ; Wiita, Paul J. (2003) Clear evidence for intranight optical variability in radio-quiet quasars The Astrophysical Journal, 586 (1). L25-L28. ISSN 0004-637X

Joshi, Yogesh C. ; Pandey, Anil K. ; Narasimha, D. ; Ram Sagar, (2003) Possible microlensing event in the direction of M31 Bulletin of the Astronomical Society of India, 31 (3-4). pp. 417-418. ISSN 0304-9523

Pandey, S. B. ; Sahu, D. K. ; Anupama, G. C. ; Bhattacharya, D. ; Ram Sagar, (2003) SN 2002ap, the hypernova of class Ic Bulletin of the Astronomical Society of India, 31 (3-4). pp. 351-352. ISSN 0304-9523

Yadav, R. K. S. ; Sagar, R. (2003) UBVRI CCD photometry of the OB associations Bochum 1 and Bochum 6 Bulletin of the Astronomical Society of India, 31 (2). pp. 87-100. ISSN 0304-9523

Pandey, A. K. ; Upadhyay, K. ; Ogura, K. ; Sagar, R. (2003) Wide field CCD photometry of the young open cluster NGC 663 Bulletin of the Astronomical Society of India, 31 (3-4). pp. 377-378. ISSN 0304-9523

Wiita, P. J. ; Stalin, C. S. ; Gopal-Krishna, ; Sagar, R. (2003) Intranight variability properties of different classes of active galactic nuclei Bulletin of the American Astronomical Society, 35 . pp. 1296-1297. ISSN 0002-7537

Pandey, S. B. ; Sahu, D. K. ; Resmi, L. ; Sagar, R. ; Anupama, G. C. ; Bhattacharya, D. ; Mohan, V. ; Prabhu, T. P. ; Bhatt, B. C. ; Pandey, J. C. ; Parihar, P. ; Castro-Tirado, A. J. (2003) Optical observations of the bright long duration peculiar GRB 021004 afterglow Bulletin of the Astronomical Society of India, 31 (1). pp. 19-36. ISSN 0304-9523

Chatterjee, S. ; Kumar, Brijesh ; Ram Sagar, (2002) On mass and velocity distributions in members of star clusters : an analytical approach Bulletin of the Astronomical Society of India, 30 (4). pp. 951-971. ISSN 0304-9523

Yadav, R. K. S. ; Ram Sagar, (2002) A deep UBVRI CCD photometric study of the open clusters Tr 1 and Be 11 Monthly Notices of the Royal Astronomical Society, 337 (1). pp. 133-146. ISSN 0035-8711

Lata, S. ; Pandey, A. K. ; Sagar, R. ; Mohan, V. (2002) Integrated photometric characteristics of galactic open star clusters Astronomy & Astrophysics, 388 (1). pp. 158-167. ISSN 0004-6361

Ram Sagar, (2002) Observations of GRB afterglows from Nainital : evidence in favour of Jet Model Bulletin of the Astronomical Society of India, 30 (1). pp. 237-248. ISSN 0304-9523

Nilakshi, ; Sagar, R. ; Pandey, A. K. ; Mohan, V. (2002) A study of spatial structure of galactic open star clusters Astronomy & Astrophysics, 383 (1). pp. 153-162. ISSN 0004-6361

Nilakshi, ; Sagar, R. (2002) A comprehensive study of the rich open star cluster NGC 2099 based on deep BVI CCD observations Astronomy & Astrophysics, 381 (1). pp. 65-76. ISSN 0004-6361

Sagar, R. ; Kumar, Brijesh ; Pant, P. ; Dumka, U. C. ; Moorthy, K. K. ; Sridharan, R. (2002) Aerosol contents at an altitude of ~2Km in Central Himalayas Bulletin of Indian Aerosol Science and Technology Association, 14 . pp. 167-170.

Gupta, S. K. ; Joshi, S. ; Girish, V. ; Sagar, R. ; Ashoka, B. N. ; Seetha, S. ; Singh, H. P. ; Das, M. K. (2002) Automated data acquisition and analysis system for the UPSO 3 channel fast photometer Proceedings of International Conference on Automated Data Analysis in Astronomy . pp. 205-210.

Kandpal, H. C. ; Mehta, D. S. ; Gopal, E. S. R. ; Vaishya, J. S. ; Sanwal, B. B. ; Singh, M. ; Ram Sagar, (2002) Determining field correlations produced by stars from the study of spectral changes in double slit experiment Astrophysics and Space Science, 280 (3). pp. 209-222. ISSN 0004-640X

Joshi, S. ; Girish, V. ; Sagar, R. ; Kurtz, D. W. ; Martinez, P. ; Seetha, S. (2002) Discovery of pulsations in the Am star HD 102480 Communications in Asteroseismology, 142 . pp. 50-51. ISSN 1021-2043

Pandey, J. C. ; Singh, K. P. ; Sagar, R. ; Drake, S. A. (2002) Photometric variability of four coronally active stars Journal of Astrophysics and Astronomy, 23 (1-2). pp. 9-14. ISSN 0250-6335

Ram Sagar, (2002) The mass function of young star clusters in our galaxy and nearby galaxies: is it universal? Astronomical Society of the Pacific, 207 . pp. 515-524. ISSN 0004-6280

Girish, V. ; Seetha, S. ; Martinez, P. ; Joshi, S. ; Ashoka, B. N. ; Kurtz, D. W. ; Chaubey, U. S. ; Gupta, S. K. ; Sagar, R. (2001) HD 12098 - a new Northern hemisphere roAp star Astronomy & Astrophysics, 380 (1). pp. 142-147. ISSN 0004-6361

Yadav, R. K. S. ; Sagar, Ram (2001) Non-uniform extinction in young open star clusters Monthly Notices of the Royal Astronomical Society, 328 (2). pp. 370-380. ISSN 0035-8711

Nagaraja Naidu, B. ; Srinivasan, R. ; Mohan, V. ; Ram Sagar, (2001) Performance of the IIA mosaic CCD camera system Bulletin of the Astronomical Society of India, 29 (4). pp. 545-561. ISSN 0304-9523

Joshi, Yogesh C. ; Pandey, Anil K. ; Narasimha, D. ; Ram Sagar, (2001) Search for microlensing events towards M31 galaxy Bulletin of the Astronomical Society of India, 29 (4). pp. 531-544. ISSN 0304-9523

Ram Sagar, ; Naidu, B. N. ; Mohan, V. (2001) A deep VI CCD photometric study of the neglected galactic star cluster NGC 6631 Bulletin of the Astronomical Society of India, 29 (4). pp. 519-530. ISSN 0304-9523

Ram Sagar, ; Munari, U. ; De Boer, K. S. (2001) A multicolour CCD photometric and mass function study of the distant Southern open star clusters NGC 3105, NGC 3603, Melotte 105, Hogg 15, NGC 4815, Pismis 20 and NGC 6253 Monthly Notices of the Royal Astronomical Society, 327 (1). pp. 23-45. ISSN 0035-8711

Joshi, S. ; Girish, V. ; Martinez, P. ; Sagar, R. ; Ashoka, B. N. ; Gupta, S. K. ; Seetha, S. ; Chaubey, U. S. ; Kurtz, D. W. (2001) Discovery of pulsations in HD 98851 Bulletin of the Astronomical Society of India, 29 (3). pp. 301-303. ISSN 0304-9523

Ram Sagar, (2001) Emission from GRBs and their afterglows : Indian observations Bulletin of the Astronomical Society of India, 29 (3). pp. 215-229. ISSN 0304-9523

Girish, V. ; Joshi, S. ; Seetha, S. ; Ashoka, B. N. ; Martinez, P. ; Chaubey, U. S. ; Gupta, S. K. ; Kurtz, D. W. ; Sagar, R. (2001) HD 12098 a new far-Northern roAp star Bulletin of the Astronomical Society of India, 29 (3). pp. 305-307. ISSN 0304-9523

Seetha, S. ; Chaubey, U. S. ; Girish, V. ; Joshi, S. ; Ashoka, B. N. ; Gupta, S. K. ; Kurtz, D. W. ; Martinez, P. ; Sagar, R. (2001) Naini Tal-Cape survey for pulsating chemically peculiar stars - a status report Bulletin of the Astronomical Society of India, 29 (3). pp. 309-312. ISSN 0304-9523

Pandey, S. B. ; Sagar, R. ; Mohan, V. ; Pandey, A. K. ; Bhattacharya, Dipankar ; Castro-Tirado, A. J. (2001) Optical follow-up of GRB afterglows from UPSO, Naini Tal Bulletin of the Astronomical Society of India, 29 (3). pp. 459-461. ISSN 0304-9523

Gupta, S. K. ; Sagar, R. ; Joshi, S. ; Ashoka, B. N. ; Babu, V. C. ; Seetha, S. ; Girish, V. (2001) UPSO three channel fast photometer Bulletin of the Astronomical Society of India, 29 (3). pp. 479-486. ISSN 0304-9523

Pandey, A. K. ; Nilakshi, ; Ogura, K. ; Ram Sagar, ; Tarusawa, K. (2001) NGC 7654: An interesting cluster to study star formation history Astronomy & Astrophysics, 374 (2). pp. 504-522. ISSN 0004-6361

Martinez, P. ; Kurtz, D. W. ; Ashoka, B. N. ; Chaubey, U. S. ; Girish, V. ; Gupta, S. K. ; Joshi, S. ; Kasturirangan, K. ; Sagar, R. ; Seetha, S. (2001) The Naini Tal-Cape survey for pulsations in chemically peculiar A-type stars Astronomy & Astrophysics, 371 (3). pp. 1048-1055. ISSN 0004-6361

Sagar, R. ; Stalin, C. S. ; Bhattacharya, D. ; Pandey, S. B. ; Mohan, V. ; Castro-Tirado, A. J. ; Pramesh Rao, A. ; Trushkin, S. A. ; Nizhelskij, N. A. ; Bremer, M. ; Castro Cerón, J. M. (2001) Optical and radio observations of the bright GRB 010222 afterglow: evidence for rapid synchrotron cooling ? Bulletin of the Astronomical Society of India, 29 (2). pp. 91-106. ISSN 0304-9523

Castro-Tirado, A. J. ; Sagar, R. ; et., al. (2001) The extraordinarily bright optical afterglow of GRB 991208 and its host galaxy Astronomy & Astrophysics, 370 (2). pp. 398-406. ISSN 0004-6361

Sagar, R. ; Pandey, S. B. ; Mohan, V. ; Bhattacharya, D. ; Castro-Tirado, A. J. (2001) GRB 000926 and its optical afterglow : another possible evidence for non-isotropic emission Bulletin of the Astronomical Society of India, 29 (1). pp. 1-13. ISSN 0304-9523

Stalin, C. S. ; Sagar, R. ; Pant, P. ; Mohan, V. ; Kumar, Brijesh ; Joshi, Y. C. ; Yadav, R. K. S. ; Joshi, S. ; Chandra, Ramesh ; Durgapal, A. K. ; Uddin, W. (2001) Seeing and microthermal measurements near Devasthal top Bulletin of the Astronomical Society of India, 29 (1). pp. 39-52. ISSN 0304-9523

Richtler, T. ; Ram Sagar, (2001) A study of the old galactic star cluster Berkeley 32 Bulletin of the Astronomical Society of India, 29 (1). pp. 53-70. ISSN 0304-9523

Ashoka, B. N. ; Kumar, ; Babu, V. C. ; Seetha, S. ; Girish, V. ; Gupta, S. K. ; Ram Sagar, ; Joshi, S. ; Narang, P. (2001) Development of a three channel photometer for UPSO, Naini Tal Journal of Astrophysics and Astronomy, 22 (1). pp. 131-144. ISSN 0250-6335

Girish, V. ; Joshi, S. ; Seetha, S. ; Ashoka, B. N. ; Martinez, P. ; Chaubey, U. S. ; Gupta, S. K. ; Kurtz, D. W. ; Sagar, R. (2001) HD 12098, the new far-Northern roAp star Bulletin of the Astronomical Society of India, 29 . pp. 305-307. ISSN 0304-9523

Sagar, R. ; Mohan, V. ; Pandey, A. K. ; Bhattacharya, D. ; Castro-Tirado, A. J. (2001) Optical follow-up of GRB afterglows from UPSO Naini Tal Bulletin of the Astronomical Society of India, 29 . pp. 459-461. ISSN 0304-9523

Kumar, Brijesh ; Ram Sagar, ; Rautela, B. S. ; Srivastava, J. B. ; Srivastava, R. K. (2000) Sky transparency over Naini Tal : a retrospective study Bulletin of the Astronomical Society of India, 28 (4). pp. 675-686. ISSN 0304-9523

Sagar, R. ; Mohan, V. ; Pandey, S. B. ; Pandey, A. K. ; Stalin, C. S. ; Castro Tirado, A. J. (2000) GRB 000301C with peculiar afterglow emission Bulletin of the Astronomical Society of India, 28 (3). pp. 499-513. ISSN 0304-9523

Gupta, A. C. ; Subramaniam, A. ; Sagar, R. ; Griffiths, W. K. (2000) A complete photometric study of the open cluster NGC 7790 containing Cepheid variables Astronomy & Astrophysics Supplement Series, 145 (3). pp. 365-375. ISSN 0365-0138

Sagar, R. ; Stalin, C. S. ; et., al. (2000) Evaluation of Devasthal site for optical astronomical observations Astronomy & Astrophysics Supplement Series, 144 (2). pp. 349-362. ISSN 0365-0138

Gopal-Krishna, ; Gupta, Alok C. ; Ram Sagar, ; Wiita, Paul J. ; Chaubey, U. S. ; Stalin, C. S. (2000) Rapid optical variability in radio-quiet QSOs Monthly Notices of the Royal Astronomical Society, 314 (4). pp. 815-825. ISSN 0035-8711

Sagar, R. ; Uddin, W. ; Pandey, A. K. ; Stalin, C. S. ; Mohan, V. ; Sanwal, B. B. ; Gupta, S. K. ; Yadav, R. K. S. ; Durgapal, A. K. ; Joshi, S. ; Kumar, Brijesh ; Gupta, A. C. ; Joshi, Y. ; Srivastava, J. B. ; Chaubey, U. S. ; Singh, M. ; Pant, P. ; Gupta, K. G. ; Padalia, T. D. (2000) Site characterization for the UPSO-TIFR telescope Bulletin of the Astronomical Society of India, 28 (2). pp. 429-435. ISSN 0304-9523

Ashoka, B. N. ; Seetha, S. ; Raj, E. ; Chaubey, U. S. ; Gupta, S. K. ; Josh, S. ; Martinez, Peter ; Kurtz, D. W. ; Ram Sagar, ; Kasturirangan, K. (2000) Survey for roAp stars in the Northern sky from Naini Tal Bulletin of the Astronomical Society of India, 28 (2). pp. 251-254. ISSN 0304-9523

Sagar, R. (2000) Importance of small and moderate size optical telescopes Current Science, 78 (9). pp. 1076-1081. ISSN 0011-3891

Sagar, R. ; Mohan, V. ; Pandey, A. K. ; Pandey, S. B. ; Castro-Tirado, A. J. (2000) Temporal behaviour of emissions from gamma-ray bursts and optical/near-IR afterglows of GRB 991208 and GRB 991216 Bulletin of the Astronomical Society of India, 28 (1). pp. 15-31. ISSN 0304-9523

Subramaniam, A. ; Gorti, U. ; Sagar, R. ; Bhatt, H. C. (2000) Binary star clusters in galaxies : our galaxy Bulletin of the Astronomical Society of India, 28 (2). pp. 257-259. ISSN 0304-9523

Joshi, S. ; Girish, V. ; Martinez, P. ; Sagar, R. ; Ashoka, B. N. ; Gupta, S. K. ; Seetha, S. ; Kurtz, D. W. ; Chaubey, U. S. (2000) Discovery of delta Scuti Pulsations in HD 98851 Information Bulletin on Variable Stars, 4900 . pp. 1-2. ISSN 0374-0676

Sagar, R. ; Bhatt, H. C. (2000) Discovery of rapid oscillations in star HD 12098 Information Bulletin on Variable Stars, 4853 . pp. 1-2. ISSN 0374-0676

Sagar, R. (2000) Distribution of stellar mass in young star clusters of our Galaxy and nearby galaxies Bulletin of the Astronomical Society of India, 28 . pp. 55-62. ISSN 0304-9523

Castro Ceron, J. M. ; Castro-Tirado, A. J. ; Henden, A. ; Vrba, F. ; Fliri, J. ; Greiner, J. ; Meusinger, H. ; Klose, S. ; Mohan, V. ; Sagar, Ram ; Pandey, S. B. (2000) GRB 001105 further optical observations Proceedings: GRB Coordinates Network . p. 894.

Subramaniam, Annapurni ; Ram Sagar, (2000) Globular cluster systems in giant elliptical galaxies : a probe for the galaxy formation and evolution Bulletin of the Astronomical Society of India, 28 (1). pp. 163-164. ISSN 0304-9523

Sagar, R. (2000) Observational features sensitive to convective core overshooting in the colour Mixing and Diffusion in Stars: Theoretical Predictions and Observational Constraints, 24th Meeting of the IAU, 5, August 2000 , Manchester, England . p. 163.

Castro-Tirado, A. J. ; Sagar, R. ; et., al (2000) Recent optical/near-IR observations of GRBs 5th Huntsville proceedings of Gamma-ray Burts, 526 . pp. 313-317.

Martinez, P. ; Kurtz, D. W. ; Chaubey, U. S. ; Gupta, S. K. ; Joshi, S. ; Sagar, R. ; Ashoka, B. N. ; Seetha, S. (2000) A survey for pulsating Ap stars from Naini Tal The Impact of Large-Scale Surveys on Pulsating Star Research, ASP Conference Series, 203 . pp. 485-486.

Martinez, Peter ; Kurtz, D. W. ; Ashoka, B. N. ; Chaubey, U. S. ; Gupta, S. K. ; Leone, F. ; Catanzaro, G. ; Sagar, R. ; Raj, E. ; Seetha, S. ; Kasturirangan, K. (1999) Discovery of pulsations in the Am star HD 13079 Monthly Notices of the Royal Astronomical Society, 309 (4). pp. 871-874. ISSN 0035-8711

Sagar, R. (1999) Some new initiatives in Optical Astronomy at UPSO, Naini Tal Current Science, 77 (5). pp. 643-652. ISSN 0011-3891

Pant, P. ; Stalin, C. S. ; Sagar, R. (1999) Microthermal measurements of surface layer seeing at Devasthal site Astronomy & Astrophysics Supplement Series, 136 (1). pp. 19-25. ISSN 0365-0138

Galama, T. J. ; Sagar, R. ; et. , al. (1999) The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999 Nature, 398 . pp. 394-399. ISSN 0028-0836

Castro-Tirado, A. J. ; Sagar, R. ; et., al. (1999) Decay of the GRB 990123 optical afterglow: implications for the fire- ball model Science, 283 (54). pp. 2069-2073. ISSN 0036-8075

Sagar, R. ; Subramaniam, A. ; Richtler, T. ; Grebel, E. K. (1999) V, I CCD photometry of metal-rich bulge globular clusters: NGC 6553 Astronomy & Astrophysics Supplement Series, 135 (3). pp. 391-404. ISSN 0365-0138

Sagar, R. ; Gopal-Krishna, ; Mohan, V. ; Pandey, A. K. ; Bhatt, B. C. ; Wagner, S. J. (1999) Multi-colour optical monitoring of the intra-day variable blazar S5 0716+71 Astronomy & Astrophysics Supplement Series, 134 (3). pp. 453-461. ISSN 0365-0138

Mohan, V. ; Uddin, W. ; Ram Sagar, ; Gupta, S. K. (1999) Atmospheric extinction at Devasthal, Naini Tal Bulletin of the Astronomical Society of India, 27 (4). pp. 601-608. ISSN 0304-9523

Nilakshi, ; Yadav, R. K. S. ; Mohan, V. ; Pandey, A. K. ; Sagar, R. (1999) BVRI CCD photometric standards in the field of GRB 990123 Bulletin of the Astronomical Society of India, 27 (3). pp. 405-410. ISSN 0304-9523

Subramaniam, Annapurni ; Ram Sagar, (1999) Multicolour deep CCD Photometry and Stellar evolutionary analysis of NGC 1907, NGC 1912, NGC 2383, NGC 2384 and NGC 6709 using synthetic colour-magnitude diagrams The Astronomical Journal, 117 (2). pp. 937-961. ISSN 0004-6256

Sagar, R. ; Pandey, A. K. ; Mohan, V. ; Yadav, R. K. S. ; Nilakshi, ; Bhattacharya, D. ; Castro-Triado, A. J. (1999) Optical follow up of the GRB 990123 sources from UPSO, Naini Tal Bulletin of the Astronomical Society of India, 27 (1). pp. 3-7. ISSN 0304-9523

Sagar, R. ; Subramaniam, A. (1999) Young star clusters of our Galaxy and the Large Magellanic Cloud as test Proceedings of international workshop on Hot Stars in Open Clusters of the Galaxy and the Magellanic Clouds, Revista Mexicana de Astronomica Astrofisica, Conference Series, 8 . pp. 93-98.

Ram Sagar, ; Griffiths, W. K. (1998) Mass functions of five distant Northern open star clusters Monthly Notices of the Royal Astronomical Society, 299 (3). pp. 777-788. ISSN 0035-8711

Ram Sagar, ; Griffiths, W. K. (1998) BVI CCD photometry of the distant open star clusters Berkeley 81, Berkeley 99, NGC 6603 and NGC 7044 Monthly Notices of the Royal Astronomical Society, 299 (1). pp. 1-23. ISSN 0035-8711

Richtler, T. ; Grebel, E. K. ; Subramaniam, A. ; Sagar, R. (1998) V, I CCD photometry of metal-rich globular clusters: NGC 6528 Astronomy & Astrophysics Supplement Series, 127 (2). pp. 167-179. ISSN 0365-0138

Kandpal, H. C. ; Wasan, A. ; Vaishya, J. S. ; Gopal, E. S. R. ; Singh, M. ; Sanwal, B. B. ; Sagar, R. (1998) Application of spatial-coherence spectroscopy for determining the angular diameters of stars: feasibility experiment Indian Journal of Pure & Applied Physics, 36 (11). pp. 665-674. ISSN 0019-5596

Bhargavi, S. G. ; Cowsik, R. ; Pati, A. K. ; Sagar, Ram (1998) CCD imaging of gamma ray burster fields Bulletin of the Astronomical Society of India, 26 . pp. 597-601. ISSN 0304-9523

Bhargavi, S. G. ; Cowsik, R. ; Pati, A. K. ; Sagar, R. (1998) CD imaging of gamma ray burster fields Bulletin of the Astronomical Society of India, 26 . pp. 597-601. ISSN 0304-9523

Pant, P. ; Ram Sagar, (1998) Proposed microthermal measurements at Devasthal Bulletin of the Astronomical Society of India, 26 . pp. 397-402. ISSN 0304-9523

Bhatt, H. C. ; Jain, S. K. ; Sagar, R. (1998) The Puppis OB III association: polarization measurements Astronomy & Astrophysics, 331 (2). pp. 737-741. ISSN 0004-6361

Sagar, R. ; Cannon, R. D. (1997) Multicolour deep CCD photometric study of the moderately young southern open star clusters NGC 3228, NGC 4103, NGC 5662 and NGC 6087 Astronomy & Astrophysics Supplement Series, 122 (1). pp. 9-29. ISSN 0365-0138

Ram Sagar, (1997) The ages of the galactic globular clusters Journal of Astrophysics and Astronomy, 18 (4). pp. 295-301. ISSN 0250-6335

Ram Sagar, ; Gopal-Krishna, ; Wiita, Paul J. (1996) Intranight optical monitoring of optically selected bright quasars Monthly Notices of the Royal Astronomical Society, 281 (4). pp. 1267-1276. ISSN 0035-8711

Ram Sagar, (1996) Discovery of a planetary system around 51 Pegasus Bulletin of the Astronomical Soceity of India, 24 (1). pp. 5-6. ISSN 0304-9523

Barman, S. K. ; Ram Sagar, (1996) Influence of a third body on the luminosity of a contact binary system Bulletin of the Astronomical Society of India, 24 (1). pp. 47-58. ISSN 0304-9523

Mallik, D. C. V. ; Sagar, R. ; Pati, A. K. (1995) A deep BVI photometric study of the open cluster NGC 2453 Astronomy & Astrophysics Supplement Series, 114 (3). pp. 537-548. ISSN 0365-0138

Subramaniam, A. ; Gorti, U. ; Sagar, R. ; Bhatt, H. C. (1995) Probable binary open star clusters in the galaxy Astronomy & Astrophysics, 302 (1). pp. 86-89. ISSN 0004-6361

Gopal-Krishna, ; Ram Sagar, ; Wiita, Paul J. (1995) Intranight optical variability in optically selected QSOs Monthly Notices of the Royal Astronomical Society, 274 (3). pp. 701-710. ISSN 0035-8711

Subramaniam, A. ; Sagar, R. (1995) Young LMC star clusters as a test for stellar evolutionary models Astronomy & Astrophysics, 297 (3). pp. 695-706. ISSN 0004-6361

Sagar, R. ; Cannon, R. D. (1995) A deep UBVRI CCD photometric study of the moderately young Southern open star cluster NGC 4755 = κ Crucis Astronomy & Astrophysics Supplement Series, 111 (1). pp. 75-84. ISSN 0365-0138

Prabhu, T. P. ; Mayya, Y. D. ; Singh, K. P. ; Kameswara Rao, N. ; Ghosh, K. K. ; Mekkaden, M. V. ; Pati, A. K. ; Raveendran, A. V. ; Reddy, B. E. ; Sagar, R. ; Subramaniam, A. ; Surendiranath, R. (1995) SN 1993J in M 81: optical photometry and spectrophotometry during the first two months Astronomy & Astrophysics, 295 (2). pp. 403-412. ISSN 0004-6361

Gopal-Krishna, ; Sagar, Ram ; Wiita, P. J. (1995) Intra night optical variability in optically selected QSOs Monthly Notices of the Royal Astronomical Society, 274 (3). pp. 701-710. ISSN 0035-8711

Iwasaki, K. ; Akabane, T. ; Sagar, R. ; Ghosh, K. K. ; Raharto, M. ; Dirghantara, F. (1995) Regression of Martian North polar cap 1994-1995 Proceedings of the 28th ISAS Lunar and Planetary Symposium . pp. 217-220.

Sagar, R. (1995) Star clusters in the Magellanic Clouds Bulletin of the Astronomical Society of India, 23 (4). pp. 433-441. ISSN 0304-9523

Grebel, E. K. ; Brander, W. ; Richtler, T. ; Subramaniam, A. ; Sagar, R. (1995) The bulge galactic globulars Terzan 5, NGC 6528, and NGC 6553 Bulletin of the American Astronomical Society, 27 . p. 1404. ISSN 0002-7537

Ram Sagar, ; Cannon, R. D. (1994) UBVRI CCD photometry of the two Southern galactic star clusters Berkeley 79 and Trumpler 11 Bulletin of the Astronomical Society of India, 22 (4). pp. 381-401. ISSN 0304-9523

Bhatt, H. C. ; Sagar, R. ; Subramaniam, A. ; Gorti, U. ; Chandrasekhar, T. ; Ashok, N. M. ; Ragland, S. (1994) SAO 75669: A late type giant behind the molecular cloud MBM 12 Astronomy & Astrophysics, 289 (3). pp. 946-948. ISSN 0004-6361

Stirpe, G. M. ; Winge, C. ; Altieri, B. ; Alloin, D. ; Aguero, E. L. ; Anupama, G. C. ; Ashley, R. ; Bertram, R. ; Calderon, J. H. ; Catchpole, R. M. ; Corradi, R. L. M. ; Covino, E. ; Dottori, H. A. ; Feast, M. W. ; Ghosh, K. K. ; Gil Hutton, R. ; Glass, I. S. ; Grebel, E. K. ; Jorda, L. ; Koen, C. ; Laney, C. D. ; Maia, M. ; Marang, F. ; Mayya, Y. D. ; Morrell, N. ; Nakada, Y. ; Pastoriza, M. G. ; Pati, A. K. ; Pelat, D. ; Peterson, B. M. ; Prabhu, T. P. ; Roberts, G. ; Sagar, R. ; Salamanca, I. ; Sekiguchi, K. ; Storchi-Bergmann, T. ; Subramaniam, A. ; Van Winckel, H. ; Van Wyk, F. ; Villada, M. ; Wagner, R. M. ; Whitelock, P. A. ; Winkler, H. ; Clavel, J. ; Dietrich, M. ; Kollatschny, W. ; O'brien, P. T. ; Perola, G. C. ; Recondo-Gonzalez, M. C. ; Rodriguez-Pascual, P. ; Santos-Lleo, M. (1994) Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. 6: Variability of NGC 3783 from ground-based data The Astrophysical Journal, 425 (2). pp. 609-621. ISSN 0004-637X

Qian, Z. Y. ; Sagar, R. (1994) A near-infrared photometric study of the young Orion nebula star cluster NGC 1976 Monthly Notices of the Royal Astronomical Society, 266 (1). pp. 114-122. ISSN 0035-8711

Wiita, P. J. ; Gopal-Krishna, ; Sagar, R. (1994) Optical microvariability in radio quiet quasars IAU Symposium, 159 . p. 414.

Sagar, R. ; Qian, Z. Y. (1993) Intracluster extinction in young open star clusters Bulletin of the Astronomical Society of India, 21 (3-4). pp. 565-568. ISSN 0304-9523

Subramaniam, A. ; Sagar, R. ; Bhatt, H. C. (1993) Spatial distribution of stellar mass in the Large Magellanic Cloud star clusters Astronomy & Astrophysics, 273 (1). pp. 100-105. ISSN 0004-6361

Gopal-Krishna, ; Ram Sagar, ; Wiita, Paul J. (1993) A search for intra-night optical variability in radio-quiet QSOs Monthly Notices of the Royal Astronomical Society, 262 (4). pp. 963-969. ISSN 0035-8711

Sagar, R. (1993) Star clusters in the Magellanic Clouds and their mass functions Current Science, 64 (5). pp. 293-300. ISSN 0011-3891

Mallik, D. C. V. ; Sagar, R. ; Pati, A. K. (1993) CCD Photometry of NGC 2453 Planetary nebulae: Proceedings of the 155 Symposium of the International Astronomical Union . p. 182.

Mohan, V. ; Pandey, A. K. ; Paliwal, D. C. ; Ram Sagar, ; Mahra, H. S. (1992) CCD photometry of the galactic open star clusters. I - King 10 Bulletin of the Astronomical Society of India, 20 (3-4). pp. 303-318. ISSN 0304-9523

Pandey, A. K. ; Mahra, H. S. ; Ram Sagar, (1992) Effect of mass segregation on mass function of young open clusters Bulletin of the Astronomical Society of India, 20 (3-4). pp. 287-295. ISSN 0304-9523

Bhatt, H. C. ; Sagar, R. (1992) A possible scenario for the formation of the composite Large Magellanic Cloud star cluster NGC 2214 Bulletin of the Astronomical Society of India, 20 (3-4). pp. 271-277. ISSN 0304-9523

Bhatt, H. C. ; Sagar, R. (1992) Optical CCD imaging of some Herbig Ae/Be stars Astronomy & Astrophysics Supplement Series, 92 (3). pp. 473-480. ISSN 0365-0138

Sagar, R. ; Richtler, T. ; de Boer, K. S. (1991) BV CCD photometry of five young Large Magellanic Cloud star clusters Astronomy & Astrophysics Supplement Series, 90 (3). pp. 387-436. ISSN 0365-0138

Sagar, R. ; Richtler, T. (1991) Mass functions of five young Large Magellanic Cloud star clusters Astronomy & Astrophysics, 250 (2). pp. 324-339. ISSN 0004-6361

Sagar, R. ; Richtler, T. ; de Boer, K. S. (1991) Two distinct supergiant branches in the young Large Magellanic Cloud star cluster NGC 2214 Astronomy & Astrophysics, 249 (2). L5-L8. ISSN 0004-6361

Ram Sagar, ; Griffiths, W. K. (1991) CCD photometry of the distant young open cluster NGC 7510 Monthly Notices of the Royal Astronomical Society, 250 (4). pp. 683-691. ISSN 0035-8711

Ram Sagar, ; Sharples, Ray M. (1991) Fibre spectroscopy and BV CCD photometry of the Southern open cluster NGC 3114 Astronomy & Astrophysics Supplement Series, 88 (1). pp. 47-62. ISSN 0365-0138

Richtler, T. ; Sagar, R. ; Vallenari, A. ; de Boer, K. S. (1991) Effects of data incompletness and metallicity on the mass functions of young LMC star clusters Proceedings of the 148th Symposium of the International Astronomical Union, 148 . pp. 222-223.

Bhatt, Harish C. ; Ram Sagar, (1991) Emission-line CCD imaging of three Southern symbiotic stars Journal of Astrophysics and Astronomy, 12 (2). pp. 111-117. ISSN 0250-6335

Richtler, T. ; de Boer, K. S. ; Sagar, R. (1991) Salpeter mass functions of young populous clusters in the LMC? ESO Messenger, 64 . pp. 50-53. ISSN 0722-6691

Pandey, A. K. ; Mahra, H. S. ; Sagar, R. (1991) A study of the spatial variation of mass functions in some young open clusters Proceedings: The Formation and Evolution of Star Clusters . pp. 170-172.

Jain, S. K. ; Bhatt, H. C. ; Ram Sagar, (1990) Measurements of linear polarization of some Herbig Ae/Be stars Astronomy & Astrophysics Supplement Series, 83 (2). pp. 237-244. ISSN 0365-0138

Ram Sagar, ; Yu, Qian Zhong (1990) Near-infrared photometric study of open star cluster IC 1805 The Astrophysical Journal, 353 (1). pp. 174-180. ISSN 0004-637X

Cannon, R. D. ; Ram Sagar, ; Hawkins, M. R. S. (1990) CCD photometry of the distant Southern globular cluster NGC 5824 Monthly Notices of the Royal Astronomical Society, 243 (1). pp. 151-158. ISSN 0035-8711

Pandey, A. K. ; Mahra, H. S. ; Ram Sagar, (1990) The young open star clusters: stability and structure The Astronomical Journal, 99 (2). pp. 617-621. ISSN 0004-6256

Ram Sagar, ; Hawkins, M. R. S. ; Cannon, R. D. (1990) The giant branch of the Fornax dwarf spheroidal galaxy Monthly Notices of the Royal Astronomical Society, 242 (1). pp. 167-176. ISSN 0035-8711

Surendiranath, R. ; Kameswara Rao, N. ; Ram Sagar, ; Nathan, J. S. ; Ghosh, K. K. (1990) CCD photometry in VRI bands of the galactic cluster NGC 2818 Journal of Astrophysics and Astronomy, 11 (2). pp. 151-166. ISSN 0250-6335

Jain, S. K. ; Bhatt, H. C. ; Sagar, R. (1990) Polarization measurements of some Herbig Ae/Be stars Proceedings of the 140th. Symposium of the International Astronomical Union, held in Heidelberg . pp. 323-324.

Ram Sagar, ; Yu, Qian Zhong (1989) JHK photometric study of the variable interstellar extinction in the direction of open star cluster NGC 654 Monthly Notices of the Royal Astronomical Society, 240 (3). pp. 551-561. ISSN 0035-8711

Sagar, R. ; Pati, A. K. (1989) Photometric performance of the CCD detector at the Kavalur 102 cm reflector Bulletin of the Astronomical Society of India, 17 (1-2). pp. 6-13. ISSN 0304-9523

Ram Sagar, ; Bhatt, Harish C. (1989) Internal kinematics of open star clusters Monthly Notices of the Royal Astronomical Society, 236 . pp. 865-874. ISSN 0035-8711

Pandey, A. K. ; Bhatt, B. C. ; Mahra, H. S. ; Ram Sagar, (1989) Integrated parameters of open clusters Monthly Notices of the Royal Astronomical Society, 236 (1). pp. 263-276. ISSN 0035-8711

Ram Sagar, ; Bhatt, Harish C. (1989) Internal motions in the open star clusters NGC 654 and 6087 Bulletin of the Astronomical Society of India, 17 (1-2). pp. 1-5. ISSN 0304-9523

Ram Sagar, ; Bhatt, Harish C. (1989) Radial distribution of the integrated light and photometric colours in open star clusters Journal of Astrophysics and Astronomy, 10 (2). pp. 173-182. ISSN 0250-6335

Sagar, R. ; Pandey, A. K. (1989) A bibliography F colour magnitude diagram studies of star clusters in the Magellanic Clouds Astronomy & Astrophysics Supplement Series, 79 . pp. 407-422. ISSN 0365-0138

Mohan, V. ; Ram Sagar, (1988) Field star contamination in open star cluster NGC 2301 Bulletin of the Astronomical Society of India, 16 (4). pp. 159-182. ISSN 0304-9523

Ram Sagar, ; Miakutin, V. I. ; Piskunov, A. E. ; Dluzhnevskaia, O. B. (1988) A study of the spatial stellar mass distribution in some young open clusters Monthly Notices of the Royal Astronomical Society, 234 (4). pp. 831-845. ISSN 0035-8711

Ram Sagar, ; Cannon, R. D. ; Hawkins, M. R. S. (1988) Photoelectric and electronographic photometry of the globular cluster NGC 1851 Monthly Notices of the Royal Astronomical Society, 232 (1). pp. 131-145. ISSN 0035-8711

Sagar, R. ; Myakutin, V. I. ; Piskunov, A. E. ; Dluzhenvskaya, O. B. (1988) Does mass segregation in open clusters take place at the time of their formation ? Indian Institute of Astrophysics Newsletter, 3 . pp. 6-7.

Ram Sagar, ; Bhatt, Harish C. (1988) Kinematical distances to open star clusters Journal of Astrophysics and Astronomy, 9 (2). pp. 117-124. ISSN 0250-6335

Ram Sagar, (1988) Non-uniform extinction in ten young open clusters Vistas in Astronomy, 31 . pp. 503-506. ISSN 0083-6656

Sagar, R. ; Srinivasan, R. (1988) PDS microdensitometer at Indian Institute of Astrophysics Proceedings of the workshop in imaging processing in astronomy held in Ooty 23 - 27 March 1987 . pp. 67-73.

Sagar, R. (1988) Profile fitting for the stellar photometry Proceedings of the workshop in imaging processing in astronomy held in Ooty 23 - 27 March 1987 . 79 - 85.

Ram Sagar, (1987) Study of interstellar extinction in some young open clusters Monthly Notices of the Royal Astronomical Society, 228 (2). pp. 483-499. ISSN 0035-8711

Sagar, R. (1987) An analysis of proper motion and membership probability in open clusters Bulletin of the Astronomical Society of India, 15 (4). pp. 193-203. ISSN 0304-9523

Joshi, U. C. ; Ram Sagar, (1986) UBV photoelectric photometry of the open cluster NGC 2539 Bulletin of the Astronomical Society of India, 14 (2). pp. 95-104. ISSN 0304-9523

Sagar, R. ; Piskunov, A. E. ; Myakutin, V. I. ; Joshi, U. C. (1986) Mass and age distributions of stars in young open clusters Monthly Notices of the Royal Astronomical Society, 220 . pp. 383-403. ISSN 0035-8711

Chandola, H. C. ; Rajput, B. S. ; Sagar, R. ; Verma, R. C. (1986) Tachyons in gravitational field Indian Journal of Pure & Applied Physics, 24 (2). pp. 51-57. ISSN 0019-5596

Stobie, R. S. ; Sagar, R. ; Gilmore, G. (1985) CCD stellar sequences in galactic structure fields Astronomy & Astrophysics Supplement Series, 60 . pp. 503-515. ISSN 0365-0138

Mohan, V. ; Sagar, R. (1985) A photometric study of the open cluster M39 Monthly Notices of the Royal Astronomical Society, 213 . pp. 337-344. ISSN 0035-8711

Sagar, R. (1985) Photometric investigation of open clusters Abastumanskaya Astrofiz Obs., Byull., 59 . pp. 191-202.

Ram Sagar, (1985) The effect of Main-Sequence stars on age estimates of open clusters Astrophysics and Space Science, 113 (1). pp. 171-180. ISSN 0004-640X

Sagar, R. ; Verma, R. C. (1984) Meson cloud effects on baryon moments Acta Physica Polonica B, 15 (10). pp. 903-908. ISSN 0587-4254

Ram Sagar, ; Verma, R. C. (1984) Anomalous magnetic moments for uncharmed and charmed baryons Canadian Journal of Physics, 62 (2). pp. 123-125. ISSN 0008-4204

Myakutin, V. I. ; Sagar, R. ; Joshi, U. C. (1984) Catalogue of masses and ages of stars in twelve open clusters Newsletter of the Centre for Stellar Data Recovery . pp. 103-106.

Sagar, R. (1984) Prospects of photometric studies in Galactic and extragalactic star clusters with the Hubble Space Telescope Bulletin of the Astronomical Society of India, 15 . pp. 54-58. ISSN 0304-9523

Sagar, R. ; Verma, Ramesh C. (1984) Strong coupling and hadron masses Canadian Journal of Physics, 62 (3). pp. 226-229. ISSN 0008-4204

Sagar, R. ; Joshi, U. C. (1983) Study of the open cluster NGC 2264 Monthly Notices of the Royal Astronomical Society, 205 . pp. 747-758. ISSN 0035-8711

Sagar, R. ; Joshi, U. C. ; Sinvhal, S. D. (1983) Integrated photometric parameters of open and globuler clusters Bulletin of the Astronomical Society of India, 11 (1). pp. 44-55. ISSN 0304-9523

Joshi, U. C. ; Sagar, R. (1983) Study of the open cluster IC 1805 Journal of the Royal Astronomical Society of Canada, 77 . pp. 40-51. ISSN 0035-872X

Joshi, U. C. ; Sagar, R. (1983) Photometry of the open cluster NGC 654 Monthly Notices of the Royal Astronomical Society, 202 . pp. 961-970. ISSN 0035-8711

Joshi, U. C. ; Sanwal, B. B. ; Sagar, R. (1983) Photometry of the open cluster NGC 6913 Publications of the Astronomical Society of Japan, 35 (3). pp. 405-412. ISSN 0004-6264

Ram Sagar, ; Joshi, U. C. (1981) Study of the galactic cluster NGC 6823 Astrophysics and Space Science, 75 (2). pp. 465-472. ISSN 0004-640X

Sagar, R. ; Joshi, U. C. (1979) A study of the young open cluster NGC 6611 Astrophysics and Space Science, 66 (1). pp. 3-12. ISSN 0004-640X

Ram Sagar, ; Joshi, U. C. (1978) The gap in the H-R diagram of open clusters with special reference to NGC 2169, NGC 1778 and TR 1 Bulletin of the Astronomical Soceity of India, 6 (2). pp. 37-41. ISSN 0304-9523

Ram Sagar, ; Joshi, U. C. (1978) Study of the galactic cluster NGC 581 Bulletin of the Astronomical Soceity of India, 6 (1). pp. 12-16. ISSN 0304-9523

Sagar, R. ; Joshi, U. C. (1978) Study of the extremely young open cluster NGC 6530 Monthly Notices of the Royal Astronomical Society, 184 . pp. 467-475. ISSN 0035-8711

Sagar, R. ; Mahra, H. S. ; Joshi, S. C. ; Srivastava, J. B. (1977) Photoelectric observations of Nova Sagittarii 1977 Information Bulletin on Variable Stars, 1307 . pp. 1-3. ISSN 0374-0676

Joshi, U. C. ; Ram Sagar, (1977) Photoelectric photometry of the open cluster Tr-1 Astrophysics and Space Science, 48 (1). pp. 225-230. ISSN 0004-640X

Ram Sagar, (1976) Photometry of the galactic cluster NGC 2169 Astrophysics and Space Science, 40 (2). pp. 447-454. ISSN 0004-640X

Joshi, U. C. ; Sagar, R. ; Pandey, P. (1975) Photoelectric photometry of the open cluster NGC 1778 Pramana - Journal of Physics, 4 (4). pp. 160-163. ISSN 0304-4289