Zobrazeno 1 - 10
of 38
pro vyhledávání: '"C.K. Bhat"'
Autor:
K. K. Yadav, P. Marandi, M. K. Koul, M. Kothari, Naveen Kumar, K. K. Singh, A. K. Tickoo, N. Chouhan, P. Chandra, R. C. Rannot, B. Ghosal, V. K. Dhar, K. Venugopal, C. Borwankar, H. C. Goyal, S. R. Kaul, K. Chanchalani, N. K. Agarwal, C.K. Bhat, K.K. Gaur, A. Goyal, R. Koul
Publikováno v:
New Astronomy. 67:67-75
We observed the TeV blazar Mrk421 in the very high energy (VHE) region with TACTIC from 21 December, 2014 to 21 February, 2015. The VHE γ-ray signal is detected from the source at a statistical significance of ∼ 9σ with 648 ± 74 γ-ray like even
Autor:
A. Agarwal, B. Ghosal, H. C. Goyal, A. K. Tickoo, V. K. Dhar, Naveen Kumar, R. C. Rannot, S. R. Kaul, Alok C. Gupta, K. Chanchalani, K. K. Singh, K. K. Yadav, P. Chandra, H. Bhatt, P. Marandi, M. K. Koul, K. Venugopal, C. Borwankar, M. Kothari, C.K. Bhat, K.K. Gaur, N. Chouhan, R. Koul, N. K. Agarwal, A. Goyal
Publikováno v:
New Astronomy. 60:42-47
Non-blazar active galactic nuclei like radio galaxies have emerged as a new class of γ-ray sources in the sky. Observations of very high energy (VHE) γ-rays from radio galaxies with misaligned jets offer a unique tool to understand the physical pro
Autor:
P. Chandra, A. Goyal, N. K. Agarwal, K. Chanchalani, C.K. Bhat, A. K. Tickoo, K.K. Gaur, Sunder Sahayanathan, V. K. Dhar, R. C. Rannot, B. Ghosal, Alok C. Gupta, H. C. Goyal, M. K. Koul, S. R. Kaul, P. Marandi, K. Venugopal, K. K. Singh, C. Borwankar, Naveen Kumar, H. Bhatt, K. K. Yadav, M. Kothari, R. Koul, Jai Bhagwan, N. Chouhan
Publikováno v:
New Astronomy. 54:42-51
We have observed Markarian 501 in Very High Energy (VHE) gamma-ray wavelength band for 70.6 hours from 15 April to 30 May, 2012 using TACTIC telescope. Detailed analysis of $\sim$66.3 hours of clean data revealed the presence of a TeV $\gamma$-ray si
Autor:
Sunder Sahayanathan, A. K. Tickoo, R. C. Rannot, B. Ghosal, R. Koul, C.K. Bhat, P. Marandi, K. Chanchalani, K.K. Gaur, A. Goyal, N. K. Agarwal, M. Kothari, P. Chandra, S. R. Kaul, H. C. Goyal, H. Bhatt, K. K. Yadav, K. K. Singh, V. K. Dhar, Naveen Kumar, M. K. Koul, N. Chouhan, K. Venugopal, C. Borwankar
Publikováno v:
Astroparticle Physics. 87:55-64
The nearby ( z = 0.031 ) TeV γ-ray emitter BL Lac object Mrk 421 has been observed with the TACTIC telescope for nearly 118 hours during 01 February to 26 April, 2012 (MJD 55958–56044). Detailed analysis reveals the detection of 529 ± 76 γ-rays
Autor:
S. V. Godambe, V. K. Dhar, K. Chanchalani, P. Chandra, N. Mankuzhiyil, K. K. Yadav, R. C. Rannot, B. Ghosal, K. K. Singh, A. K. Tickoo, N. K. Agarwal, S. Godiyal, Sunder Sahayanathan, Naveen Kumar, N. Chouhan, M. K. Koul, K. Venugopal, M. Sharma, C. Borwankar, A. Tolamatti, A. Goyal, P. Marandi, M. Kothari, C.K. Bhat, K.K. Gaur
Publikováno v:
New Astronomy. 80:101402
Located in the Perseus galaxy cluster, NGC 1275 ( z = 0.0179 ), is the brightest radio galaxy detected in both high energy (HE ; E > 100 MeV) and very high energy (VHE ; E > 100 GeV) regimes. Here we present the results from the observations of NGC 1
Publikováno v:
Radiation Physics and Chemistry. 125:9-13
Analysis of didymium (Di) and praseodymium molybdate crystals were carried out using energy dispersive X-ray fluorescence (EDXRF). The assigned empirical chemical formulae of the composites were tested and verified by the EDXRF technique by estimatin
Autor:
N. K. Agarwal, B. Ghosal, M. K. Koul, K. K. Gour, K. K. Singh, K. Venugopal, C. Borwankar, P. Marandi, C.K. Bhat, Naveen Kumar, M. Kothari, R. Koul, R. C. Rannot, P. Chandra, H. C. Goyal, A. Goyal, K. Chanchalani, A. K. Tickoo, V. K. Dhar, S. R. Kaul, K. K. Yadav, N. Chouhan
In this work, we report on the detection of enhanced TeV gamma- ray emission from the high synchrotron-peaked blazar Mrk 421 with the TACTIC telescope on the night of December 28, 2014 (MJD 57019). We use data from the TACTIC observations of Mrk 421
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d489de38815e2e606d44c0155f2795d2
http://arxiv.org/abs/1808.02670
http://arxiv.org/abs/1808.02670
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
Publikováno v:
New Astronomy. 36:1-8
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 motiva
Autor:
N. Chouhan, K. K. Singh, A. K. Tickoo, M. K. Koul, Naveen Kumar, K. Chanchalani, K. Venugopal, C. Borwankar, S. Sahaynathan, P. Chandra, R. Koul, P. Marandi, M. Kothari, C.K. Bhat, A. Goyal, N. K. Agarwal, H. C. Goyal, S. R. Kaul, Nilay Bhatt, Abhas Mitra, M. Sharma, K. K. Yadav, V. K. Dhar, S. Kotwal, Subir Bhattacharyya, R. C. Rannot
Publikováno v:
Pramana. 82:585-605
The TeV atmospheric Cherenkov telescope with imaging camera (TACTIC) γ-ray telescope has been in operation at Mt. Abu, India since 2001 to study TeV γ-ray emission from celestial sources. During the last 10 years, apart from consistently detecting
Autor:
C.K. Bhat
Publikováno v:
Radiation Physics and Chemistry. 65:193-197
Energy-dispersive X-ray fluorescence (EDXRF) technique was used to determine the gallium content of bauxite ore samples collected from several sites located in the Jammu region of North India. To achieve an optimum detection efficiency, mono-energeti