Publications (20)
Observations of the Crab Nebula, Mkn 501 and Mkn 421 using the TACTIC Imaging Element
N. Bhatt, N. K. Agarwal, C. K. Bhat +22
The results of our observational campaigns on the two extragalactic sources Mkn 501 and Mkn 421, carried out with the Imaging Element of the TACTIC array, during March-May, 1998 an…
TeV Gamma-ray Observations of Markarian 421 using TACTIC during 2009-10
P. Chandra, R. C. Rannot, K. K. Yadav +24
We have observed the blazar Markarian 421 with the TACTIC -ray telescope at Mt. Abu, India, from 22 November 2009 to 16 May 2010 for 265 hours. Detailed analysis of the data so…
Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov Telescope
D. A. Smith, E. Brion, R. Britto +18
We have measured the gamma-ray fluxes of the blazars Mrk 421 and Mrk 501 in the energy range between 50 and 350 GeV (1.2 to 8.3 x 10^25 Hz). The detector, called CELESTE, used firs…
Measurement of the Crab Flux Above 60 GeV with the CELESTE Cherenkov Telescope
M. De Naurois, J. Holder, R. Bazer-Bachi +29
We have converted the former solar electrical plant THEMIS (French Pyrenees) into an atmospheric Cherenkov detector called CELESTE, which records gamma rays above 30 GeV (7E24 Hz).…
CTA Contributions to the 34th International Cosmic Ray Conference (ICRC2015)
The CTA Consortium, :, A. Abchiche +1305
List of contributions from the CTA Consortium presented at the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands.
Very High-energy Gamma-Ray Episodic Activity of Radio Galaxy NGC 1275 in 2022-2023 Measured with MACE
S. Godambe, N. Mankuzhiyil, C. Borwankar +37
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 Te…
The TACTIC atmospheric Cherenkov Imaging telescope
R. Koul, A. K. Tickoo, S. K. Kaul +19
The TACTIC -ray telescope, equipped with a light collector of area 9.5m and a medium resolution imaging camera of 349-pixels, has been in operation at Mt.Abu, India s…
Cherenkov Telescope Array Contributions to the 35th International Cosmic Ray Conference (ICRC2017)
F. Acero, B. S. Acharya, V. AcÃn Portella +1137
List of contributions from the Cherenkov Telescope Array Consortium presented at the 35th International Cosmic Ray Conference, July 12-20 2017, Busan, Korea.
Search for TeV --ray emission from blazar 1ES1218+304 with TACTIC telescope during March-April 2013
K. K. Singh, K. K. Yadav, A. K. Tickoo +22
In this paper, we present results of TeV --ray observations of the high synchrotron peaked BL Lac object 1ES 1218+304 (z=0.182) with the (TeV Atmospheric Cherenkov Tel…
Very High Energy -ray and Near Infrared observations of 1ES2344+514 during 2004-05
S. V. Godambe, R. C. Rannot, K. S. Baliyan +20
We have observed the BL Lac object 1ES2344+514 (z = 0.044) in Very High Energy (VHE) gamma-ray and near-infrared wavelength bands with TACTIC and MIRO telescopes respectively. The…
Observations of TeV gamma-rays from Mrk 421 during Dec. 2005 to Apr. 2006 with the TACTIC telescope
K. K. Yadav, P. Chandra, A. K. Tickoo +16
The TACTIC -ray telescope has observed Mrk 421 on 66 clear nights from Dec. 07, 2005 to Apr. 30, 2006, totalling 202 hours of on-source observations. Here, we report the…
Multi-wavelength study of Mrk 421 TeV flare observed with \emph{TACTIC} telescope in February 2010
K. K. Singh, K. K. Yadav, P. Chandra +5
We present results from multi-wavelength study of intense flaring activity from a high frequency peaked BL Lac object Mrk 421. The source was observed in its flaring state on Febru…
Simulation studies for optimizing the trigger generation criteria for the TACTIC telescope
M. K. Koul, A. K. Tickoo, V. K. Dhar +7
In this paper, we present the results of Monte Carlo simulations of -ray and cosmic ray proton induced extensive air showers as detected by the TACTIC atmospheric Cherenkov ima…
Contributions of the Cherenkov Telescope Array (CTA) to the 6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma 2016)
The CTA Consortium, :, A. Abchiche +1387
List of contributions from the Cherenkov Telescope Array (CTA) Consortium presented at the 6th International Symposium on High-Energy Gamma-Ray Astronomy (Gamma 2016), July 11-15,…
Search for TeV -rays from H1426+428 during 2004-07 with the TACTIC telescope
K. K. Yadav, R. C. Rannot, P. Chandra +15
The BL Lac object H1426+428 () is an established source of TeV -rays and detections of these photons from this object also have important implications for estima…
First results on characterization of Cerenkov images through combined use of Hillas, fractal and wavelet parameters
A. Haungs, A. K. Razdan, C. L. Bhat +2
Based on Monte Carlo simulations using the CORSIKA code, it is shown that Cerenkov images produced by ultrahigh energy -rays and cosmic ray nuclei (proton, Neon and Iron) are f…
Very High Energy gamma-ray observations of Mrk 501 using TACTIC imaging gamma-ray telescope during 2005-06
S. V. Godambe, R. C. Rannot, P. Chandra +16
In this paper we report on the Markarian 501 results obtained during our TeV -ray observations from March 11 to May 12, 2005 and February 28 to May 7, 2006 for 112.5 hours with…
Artificial Neural Network based gamma-hadron segregation methodology for TACTIC telescope
V. K. Dhar, A. K. Tickoo, M. K. Koul +8
The sensitivity of a Cherenkov imaging telescope is strongly dependent on the rejection of the cosmic-ray background events. The methods which have been used to achieve the segrega…
ANN-based energy reconstruction procedure for TACTIC gamma-ray telescope and its comparison with other conventional methods
V. K. Dhar, A. K. Tickoo, M. K. Koul +5
The energy estimation procedures employed by different groups, for determining the energy of the primary -ray using a single atmospheric Cherenkov imaging telescope, include me…
CTA contributions to the 33rd International Cosmic Ray Conference (ICRC2013)
The CTA Consortium, :, O. Abril +1102
Compilation of CTA contributions to the proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), which took place in 2-9 July, 2013, in Rio de Janeiro, Brazil