Search for TeV γ-ray emission from blazar 1ES1218+304 with TACTIC telescope during March–April 2013
| Autor: | K. K. Yadav, V. K. Dhar, S. R. Kaul, A. K. Tickoo, B. Ghosal, K. Venugopal, C. Borwankar, M. K. Koul, H. C. Goyal, N. Chouhan, Naveen Kumar, H. Bhatt, P. Chandra, P. Marandi, M. Kothari, N. K. Agarwal, R. C. Rannot, K. Chanchalani, C.K. Bhat, K.K. Gaur, R. Koul, A. Goyal, Alok C. Gupta, J. Bhagwan, K. K. Singh |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Astronomy Flux Astronomy and Astrophysics Astrophysics Cherenkov Telescope Array Synchrotron Redshift law.invention Telescope Space and Planetary Science law High Energy Physics::Experiment Astrophysics - High Energy Astrophysical Phenomena Blazar Instrumentation Cherenkov radiation BL Lac object |
| Zdroj: | New Astronomy. 36:1-8 |
| ISSN: | 1384-1076 |
| Popis: | In this paper, we present results of TeV $\gamma$--ray observations of the high synchrotron peaked BL Lac object 1ES 1218+304 (z=0.182) with the $TACTIC$ (TeV Atmospheric Cherenkov Telescope with Imaging Camera). The observations are primarily motivated by the unusually hard GeV-TeV spectrum of the source despite its relatively large redshift. The source is observed in the TeV energy range with the $TACTIC$ from March 1, 2013 to April 15, 2013 (MJD 56352--56397) for a total observation time of 39.62 h and no evidence of TeV $\gamma$--ray activity is found from the source. The corresponding 99$\%$ confidence level upper limit on the integral flux above a threshold energy of 1.1 TeV is estimated to be 3.41 $\times10^{-12}$ photons cm$^{-2}$ s$^{-1}$ (i.e $ Comment: Accepted for Publication in New Astronomy |
| Databáze: | OpenAIRE |
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