Search Results - "Goyal, H. C"

Study of short term enhanced TeV γ- ray emission from Mrk 421 observed with TACTIC on December 28, 2014 by Singh, K K, Yadav, K K, Chanchalani, K, Chandra, P, Ghosal, B, Tickoo, A K, Rannot, R C, Marandi, P, Agarwal, N K, Kothari, M, Gour, K K, Goyal, H C, Goyal, A, Kumar, N, Borwankar, C, Kaul, S R, Dhar, V K, Koul, M K, Koul, R, Venugopal, K, Bhat, C K, Chouhan, N

“…In this work, we report on the detection of enhanced TeV γ- ray emission from the high synchrotron-peaked blazar Mrk 421 with the TACTIC telescope on the night…”
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Multiwavelength study of Fermi hard spectrum blazar B2 0806+35 using Swift, Fermi, and TACTIC observations by Bhattacharyya, S, Ghosal, B, Chandra, P, Singh, K K, Yadav, K K, Tickoo, A K, Rannot, R C, Kumar, N, Marandi, P, Agarwal, N K, Kothari, M, Gour, K K, Goyal, H C, Goyal, A, Chauhan, N, Borwankar, C, Dhar, V K, Koul, M K, Koul, R, Venugopal, K, Chanchalani, K, Bhat, C K, Sharma, M, Bhatt, N

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Search for TeV γ-ray emission from blazar 1ES1218+304 with TACTIC telescope during March–April 2013 by Singh, K.K., Yadav, K.K., Tickoo, A.K., Rannot, R.C., Chandra, P., Agarwal, N.K., Gaur, K.K., Goyal, A., Goyal, H.C., Kumar, N., Marandi, P., Kothari, M., Bhatt, H., Chanchalani, K., Chouhan, N., Dhar, V.K., Ghosal, B., Kaul, S.R., Koul, M.K., Koul, R., Venugopal, K., Bhat, C.K., Borwankar, C., Bhagwan, J., Gupta, A.C.

“…•We search for TeV gamma-ray emission from blazar 1ES 1218+304 with TACTIC telescope.•No activity in TeV energy regime is observed from the source.•We present…”
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Long term performance evaluation of the TACTIC imaging telescope using ∼400 h Crab Nebula observation during 2003–2010 by TICKOO, A K, KOUL, R, RANNOT, R C, YADAV, K K, CHANDRA, P, DHAR, V K, KOUL, M K, KOTHARI, M, AGARWAL, N K, GOYAL, A, GOYAL, H C, KOTWAL, S, KUMAR, N, MARANDI, P, VENUGOPAL, K, CHANCHALANI, K, BHATT, N, BHATTACHARYYA, S, BORWANKAR, C, CHOUHAN, N, KAUL, S R, MITRA, A K, SAHAYNATHAN, S, SHARMA, M, SINGH, K K, BHAT, C K

“…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…”
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Real-time data acquisition and control system for the 349-pixel TACTIC atmospheric Cherenkov imaging telescope by Yadav, K.K, Koul, R, Kanda, A, Kaul, S.R, Tickoo, A.K, Rannot, R.C, Chandra, P, Bhatt, N, Chouhan, N, Venugopal, K, Kothari, M, Goyal, H.C, Dhar, V.K, Kaul, S.K

“…An interrupt-based multinode data acquisition and control system has been developed for the imaging element of the TACTIC γ-ray telescope. The system which has…”
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A generalized ray-tracing procedure for an atmospheric Cherenkov imaging telescope and optical characteristics of the TACTIC light collector by Tickoo, A.K., Suthar, R.L., Koul, R., Sapru, M.L., Kumar, N., Kaul, C.L., Yadav, K.K., Thoudam, S., Kaul, S.K., Venugopal, K., Kothari, M., Goyal, H.C., Chandra, P., Dhar, V.K., Rannot, R.C., Koul, M.K., Kaul, S.R.

“…A generalized ray-tracing procedure has been developed, which facilitates the design of a multimirror-based light collector used in atmospheric Cherenkov…”
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A time dependent approach to model X-ray and γ–ray light curves of Mrk 421 observed during the flare in February 2010 by Singh, K.K., Sahayanathan, S., Sinha, A., Bhatt, N., Tickoo, A.K., Yadav, K.K., Rannot, R.C., Chandra, P., Venugopal, K., Marandi, P., Kumar, N., Goyal, H.C., Goyal, A., Agarwal, N.K., Kothari, M., Chanchalani, K., Dhar, V.K., Chouhan, N., Bhat, C.K., Koul, M.K., Koul, R.

“…•Time dependent single zone SSC model is used to reproduce the broad band emission.•Temporal analysis of light curves indicates asymmetric flare with fast rise…”
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VHE observation of Mrk 421 with TACTIC during 2012; multiwavelength study by Ghosal, B., Yadav, K.K., Singh, K.K., Rannot, R.C., Tickoo, A.K., Chandra, P., Bhatt, H., Gaur, K.K., Goyal, A., Goyal, H.C., Kumar, N., Marandi, P., Kothari, M., Sahayanathan, S., Chanchalani, K., Agarwal, N.K., Dhar, V.K., Kaul, S.R., Koul, M.K., Koul, R., Venugopal, K., Bhat, C.K., Borwankar, C., Chouhan, N.

“…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,…”
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Multiwavelength study of VHE emission from Markarian 501 using TACTIC observations during April–May, 2012 by Chandra, P., Singh, K.K., Rannot, R.C., Yadav, K.K., Bhatt, H., Tickoo, A.K., Ghosal, B., Kothari, M., Gaur, K.K., Goyal, A., Goyal, H.C., Kumar, N., Marandi, P., Chouhan, N., Sahayanathan, S., Chanchalani, K., Agarwal, N.K., Dhar, V.K., Kaul, S.R., Koul, M.K., Koul, R., Venugopal, K., Bhat, C.K., Borwankar, C., Bhagwan, J., Gupta, A.C.

“…•We search for TeV gamma-ray emission from blazar Mrk 501 using TACTIC telescope.•The source was found in relatively high state during 22–27 May,…”
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TeV γ-ray emission from Mrk 421 observed with TACTIC during December 2014–February 2015 by Yadav, K.K., Chanchalani, K., Singh, K.K., Ghosal, B., Chandra, P., Rannot, R.C., Tickoo, A.K., Agarwal, N.K., Kothari, M., Gaur, K.K., Goyal, H.C., Goyal, A., Kumar, N., Marandi, P., Kaul, S.R., Dhar, V.K., Koul, M.K., Koul, R., Venugopal, K., Bhat, C.K., Chouhan, N., Borwankar, C.

“…•VHE gamma-ray observations of Mrk 421 with TACTIC during 2014-15.•Near simultaneous multi-wavelength data used to complement the TACTIC…”
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Search for very high energy gamma-ray emission from the peculiar radio galaxy IC 310 with TACTIC during 2012 to 2015 by Ghosal, B., Singh, K.K., Yadav, K.K., Tickoo, A.K., Rannot, R.C., Chandra, P., Kothari, M., Gaur, K.K., Goyal, H.C., Goyal, A., Kumar, N., Marandi, P., Chanchalani, K., Agarwal, N.K., Dhar, V.K., Koul, M.K., Koul, R., Venugopal, K., Bhat, C.K., Chouhan, N., Borwankar, C., Kaul, S.R., Bhatt, H., Agarwal, A., Gupta, A.C.

“…•Long term observation (three years) with TACTIC telescope in search for TeV gamma-rays from IC 310.•Nearly simultaneous observation with Fermi-LAT and from…”
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TeV Gamma-ray Observations of Markarian 421 using TACTIC during 2009-10 by 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

“…We have observed the blazar Markarian 421 with the TACTIC $\gamma$-ray telescope at Mt. Abu, India, from 22 November 2009 to 16 May 2010 for 265 hours…”
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The TACTIC atmospheric Cherenkov imaging telescope by Koul, R., Tickoo, A.K., Kaul, S.K., Kaul, S.R., Kumar, N., Yadav, K.K., Bhatt, N., Venugopal, K., Goyal, H.C., Kothari, M., Chandra, P., Rannot, R.C., Dhar, V.K., Koul, M.K., Kaul, R.K., Kotwal, S., Chanchalani, K., Thoudam, S., Chouhan, N., Sharma, M., Bhattacharyya, S., Sahayanathan, S.

“…The TACTIC (TeV Atomospheric Cherenkov Telescope with Imaging Camera) γ -ray telescope, equipped with a light collector of area ∼ 9.5 m 2 and a medium…”
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Observations of TeV γ-rays from Mrk 421 during December 2005 to April 2006 with the TACTIC telescope by Yadav, K.K., Chandra, P., Tickoo, A.K., Rannot, R.C., Godambe, S., Koul, M.K., Dhar, V.K., Thoudam, S., Bhatt, N., Bhattacharyya, S., Chanchalani, K., Goyal, H.C., Kaul, R.K., Kothari, M., Kotwal, S., Koul, R., Sahayanathan, S., Sharma, M., Venugopal, K.

“…The TACTIC γ-ray telescope has observed Mrk 421 on 66 clear nights from December 07, 2005 to April 30, 2006, totalling ∼202 h of on-source observations. Here,…”
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Very High Energy gamma-ray observations of Mrk 501 using TACTIC imaging gamma-ray telescope during 2005-06 by Godambe, S. V, Rannot, R. C, Chandra, P, Yadav, K. K, Tickoo, A. K, Venugopal, K, Bhatt, N, Bhattacharyya, S, Chanchalani, K, Dhar, V. K, Goyal, H. C, Kaul, R. K, Kothari, M, Kotwal, S, Koul, M. K, Koul, R, Sahaynathan, B. S, Sharma, M, Thoudam, S

“…J.Phys.G35:065202,2008 In this paper we report on the Markarian 501 results obtained during our TeV $\gamma$-ray observations from March 11 to May 12, 2005 and…”
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The TACTIC atmospheric Cherenkov Imaging telescope by Koul, R, Tickoo, A. K, Kaul, S. K, Kaul, S. R, Kumar, N, Yadav, K. K, Bhatt, N, Venugopal, K, Goyal, H. C, Kothari, M, Chandra, P, Rannot, R. C, Dhar, V. K, Koul, M. K, Kaul, R. K, Kotwal, S, Chanchalani, K, Thoudam, S, Chouhan, N, Sharma, M, Bhattacharyya, S, Sahayanathan, S

“…Nucl.Instrum.Meth.A578:548-564,2007 The TACTIC $\gamma$-ray telescope, equipped with a light collector of area $\sim$9.5m$^2$ and a medium resolution imaging…”
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Study of short term enhanced TeV $\gamma$- ray emission from Mrk 421 observed with TACTIC on December 28, 2014 by Singh, K K, Yadav, K K, Chanchalani, K, Chandra, P, Ghosal, B, Tickoo, A K, Rannot, R C, Marandi, P, Agarwal, N K, Kothari, M, Gour, K K, Goyal, H C, Goyal, A, Kumar, N, Borwankar, C, Kaul, S R, Dhar, V K, Koul, M K, Koul, R, Venugopal, K, Bhat, C K, Chouhan, N

“…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…”
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Multiwavelength study of VHE emission from Markarian 501 using TACTIC observations during April-May, 2012 by Chandra, P, Singh, K K, Rannot, R C, Yadav, K K, Bhatt, H, Tickoo, A K, Ghosal, B, Kothari, M, Gaur, K K, Goyal, A, Goyal, H C, Kumar, N, Marandi, P, Chouhan, N, Sahayanathan, S, Chanchalani, K, Agarwal, N K, Dhar, V K, Kaul, S R, Koul, M K, Koul, R, Venugopal, K, Bhat, C K, Borwankar, C, Bhagwan, J, Gupta, A C

“…New Astronomy 54C (2017) pp. 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,…”
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A time dependent approach to model X-ray and $\gamma$--ray light curves of Mrk 421 observed during the flare in February 2010 by Singh, K K, Sahayanathan, S, Sinha, A, Bhatt, N, Tickoo, A K, Yadav, K K, Rannot, R C, Chandra, P, Venugopal, K, Marandi, P, Kumar, N, Goyal, H C, Goyal, A, Agarwal, N K, Kothari, M, Chanchalani, K, Dhar, V K, Chouhan, N, Bhat, C K, Koul, M K, Koul, R

“…New Astronomy 54 (2017) 24-29 Strong X-ray and $\gamma$--ray flares have been detected in February 2010 from the high synchrotron peaked blazar Mrk 421…”
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Search for TeV $\gamma$--ray emission from blazar 1ES1218+304 with TACTIC telescope during March-April 2013 by Singh, K. K, Yadav, K. K, Tickoo, A. K, Rannot, R. C, Chandra, P, Agarwal, N. K, Gaur, K. K, Goyal, A, Goyal, H. C, Kumar, N, Marandi, P, Kothari, M, Bhatt, H, Chanchalani, K, Chouhan, N, Dhar, V. K, Ghosal, B, Kaul, S. R, Koul, M. K, Koul, R, Venugopal, K, Bhat, C. K, Borwankar, C, Bhagwan, J, Gupta, A. C

“…2015 New Astronomy 36, p 1-8 In this paper, we present results of TeV $\gamma$--ray observations of the high synchrotron peaked BL Lac object 1ES 1218+304…”
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