Chandra, P ; Rannot, R C ; Yadav, K K ; Tickoo, A K ; Singh, K K ; Chanchalani, K ; Kothari, M ; Agarwal, N K ; Goyal, A ; Goyal, H C ; Kotwal, S ; Kumar, N ; Marandi, P ; Venugopal, K ; Bhat, C K ; Bhatt, N ; Bhattacharya, S ; Borwankar, C ; Chouhan, N ; Dhar, V K ; Kaul, S R ; Koul, S K ; Koul, M K ; Koul, R ; Mitra, A K ; Sahayanathan, S ; Sharma, M (2012) TeV gamma-ray observations of Markarian 421 using TACTIC during 2009–10 Journal of Physics G: Nuclear and Particle Physics, 39 (4). 045201. ISSN 0954-3899
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Official URL: http://doi.org/10.1088/0954-3899/39/4/045201
Related URL: http://dx.doi.org/10.1088/0954-3899/39/4/045201
Abstract
We have observed the blazar Markarian 421 with the TACTIC γ-ray telescope at Mt. Abu, India, from 22 November 2009 to 16 May 2010 for 265 h. Detailed analysis of the data so recorded revealed the presence of a TeV γ-ray signal with a statistical significance of 12.12σ at Eγ ⩾ 1 TeV. We have estimated the time-averaged differential energy spectrum of the source in the energy range 1.0–16.44 TeV. The spectrum fits well with the power-law function of the form (dF/dE = f0E−Γ) with f0 = (1.39 ± 0.239) × 10−11 cm−2 s−1 TeV−1 and Γ = 2.31 ± 0.14.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics Publishing. |
| ID Code: | 134052 |
| Deposited On: | 03 Jan 2023 09:05 |
| Last Modified: | 03 Jan 2023 09:05 |
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