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
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Official URL: http://adsabs.harvard.edu/abs/1999BASI...27....3S
Abstract
The CCD magnitudes in Johnson BV and Cousins R photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after trigger of the gamma-ray burst. BVR photometric light curves are obtained by combining the published data with the present measurements. They indicate that the flux decay constants in BV and R passbands are almost the same. Its value is 1.1± 0.06. Such decay is quite consistent with the fireball models for the optical transient.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Astronomical Society of India. |
| ID Code: | 65952 |
| Deposited On: | 20 Oct 2011 06:20 |
| Last Modified: | 18 May 2016 13:43 |
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