Zobrazeno 1 - 10
of 166
pro vyhledávání: '"Chitnis, V R"'
Autor:
Godambe, S., Mankuzhiyil, N., Borwankar, C., Ghosal, B., Tolamatti, A., Pal, M., Chandra, P., Khurana, M., Pandey, P., Dar, Z. A., Godiyal, S., Hariharan, J., Anand, Keshav, Norlha, S., Sarkar, D., Thubstan, R., Venugopal, K., Pathania, A., Kotwal, S., Kumar, Raj, Bhatt, N., Chanchalani, K., Das, M., Singh, K. K., Gour, K. K., Kothari, M., Kumar, Nandan, Kumar, Naveen, Marandi, P., Kushwaha, C. P., Koul, M. K., Dorjey, P., Dorji, N., Chitnis, V. R., Rannot, R. C., Bhattacharyya, S., Chouhan, N., Dhar, V. K., Sharma, M., Yadav, K. K.
Publikováno v:
The Astrophysical Journal Letters, Volume 974, Number 2 (2024)
The radio galaxy NGC 1275, located at the central region of Perseus cluster, is a well-known very high-energy (VHE) gamma-ray emitter. The Major Atmospheric Cherenkov Experiment Telescope has detected two distinct episodes of VHE (E > 80 GeV) gamma-r
Externí odkaz:
http://arxiv.org/abs/2411.01823
Autor:
Agarwal, S., Banerjee, B., Shukla, A., Roy, J., Acharya, S., Vaidya, B., Chitnis, V. R., Wagner, S. M., Mannheim, K., Branchesi, M.
The evolution of the spectral energy distribution during flares constrains models of particle acceleration in blazar jets. The archetypical blazar BL Lac provided a unique opportunity to study spectral variations during an extended strong flaring epi
Externí odkaz:
http://arxiv.org/abs/2302.07904
Publikováno v:
The European Physical Journal Special Topics (2022)
Very high energy {\gamma}-rays are one of the most important messengers of the non-thermal Universe. The major motivation of very high energy {\gamma}-ray astronomy is to find sources of high energy cosmic rays. Several astrophysical sources are know
Externí odkaz:
http://arxiv.org/abs/2201.06789
Publikováno v:
The European Physical Journal Special Topics (2022)
Very High Energy (VHE) gamma rays constitute one of the main pillars of high energy astrophysics. Gamma rays are produced under extreme relativistic conditions in the Universe. VHE gamma$ rays can be detected indirectly on the ground. Detection of th
Externí odkaz:
http://arxiv.org/abs/2201.04719
Autor:
Sarkar, A., Chitnis, V. R., Gupta, A. C., Gaur, H., Patel, S. R., Wiita, P. J., Volvach, A. E., Tornikoski, M., Chamani, W., Enestam, S., Lähteenmäki, A., Tammi, J., Vera, R. J. C, Volvach, L. N.
We performed a long-term optical (B, V, R bands), infra-red (J and K bands) and radio band (15, 22, 37 GHz band) study on the flat spectrum radio quasar, 3C 454.3, using the data collected over a period of more than 8 years (MJD 54500--57500). The te
Externí odkaz:
http://arxiv.org/abs/1910.14329
Autor:
Singh, B. B., Britto, R. J., Chitnis, V. R., Shukla, A., Saha, L., Sinha, A., Acharya, B. S., Vishwanath, P. R., Anupama, G. C., Bhattacharjee, P., Gothe, K. S., Nagesh, B. K., Prabhu, T. P., Rao, S. K, Srinivasan, R., Upadhya, S. S.
HAGAR is a system of seven Non-imaging Atmospheric Cherenkov Telescopes located at Hanle in the Ladakh region of the Indian Himalayas at an altitude of 4270 meters {\it amsl}. Since 2008, we have observed the Crab Nebula to assess the performance of
Externí odkaz:
http://arxiv.org/abs/1902.01081
Akademický článek
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The TeV blazar Ton 599 has exhibited a peculiar flare in 2017 November. The temporal variation of the source is studied using simultaneous $\gamma$-ray data from $\textit{Fermi}$ Large Area Telescope and radio data from Owens Valley Radio Observatory
Externí odkaz:
http://arxiv.org/abs/1809.05269
Autor:
Chaudhury, K., Chitnis, V. R., Rao, A. R., Singh, K. P., Bhattacharyya, Sudip, Dewangan, G. C., Chakraborty, S., Chandra, S., Stewart, G. C., Mukerjee, K., Dey, R. K.
Publikováno v:
MNRAS, Volume 478, Issue 4, Pages 4830-4836, 2018
We present the results of our study of the long term X-ray variability characteristics of the Narrow Line Seyfert 1 galaxy RE J1034+396. We use data obtained from the AstroSat satellite along with the light curves obtained from XMM-Newton and Swift-X
Externí odkaz:
http://arxiv.org/abs/1807.06460
Autor:
Patel, S. R., Shukla, A., Chitnis, V. R., Dorner, D., Mannheim, K., Acharya, B. S., Nagare, B. J.
Publikováno v:
A&A 611, A44 (2018)
Aim : The nearby TeV blazar 1ES 1959+650 (z=0.047) was reported to be in flaring state during June - July 2016 by Fermi-LAT, FACT, MAGIC and VERITAS collaborations. We studied the spectral energy distributions (SEDs) in different states of the flare
Externí odkaz:
http://arxiv.org/abs/1711.08583