TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element

R. C. Rannot; P. Chandra; S. Thoudam; K. K. Yadav; K. Venugopal; N. Bhatt; S. Bhattacharyya; V. K. Dhar; H. C. Goyal; S. Godambe; R. K. Kaul; M. Kothari; S. Kotwal; R. Koul; A. K. Tickoo; S. Sahayanathan; M. L. Sapru; M. K. Koul; M. Sharma

TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element

R. C. Rannot
, P. Chandra
, S. Thoudam
, K. K. Yadav
, K. Venugopal
, N. Bhatt
, S. Bhattacharyya
, V. K. Dhar
, H. C. Goyal
, S. Godambe
, R. K. Kaul
, M. Kothari
, S. Kotwal
, R. Koul
, A. K. Tickoo
, S. Sahayanathan
, M. L. Sapru
, M. K. Koul
, M. Sharma

Physics

Bhabha Atomic Research Center

Research output: Contribution to conference › Paper › peer-review

13 Scopus citations

Abstract

We have observed the blazar Markarian 421 (z=0.031 ) with the TACTIC gamma- ray telescope having threshold energy of 1.5TeV at Mt. Abu Rajasthan India from January to April 2004. Observations were made in tracking mode for a total of 84(on) /16 (off-source) hours with its imaging element equipped with a 349- pixel PMTs camera. During this period, we find an evidence of a TeV gamma-ray signal with a statistical significance of 6.8 δ The differential energy spectrum derived in the energy range 2 - 9 TeV is well represented by a simple power law, with a differential spectral index of 2.80 ± 0.20.

Original language	British English
Pages	355-358
Number of pages	4
State	Published - 2005
Event	29th International Cosmic Ray Conference, ICRC 2005 - Pune, India Duration: 3 Aug 2005 → 10 Aug 2005

Conference

Conference	29th International Cosmic Ray Conference, ICRC 2005
Country/Territory	India
City	Pune
Period	3/08/05 → 10/08/05

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Rannot, R. C., Chandra, P., Thoudam, S., Yadav, K. K., Venugopal, K., Bhatt, N., Bhattacharyya, S., Dhar, V. K., Goyal, H. C., Godambe, S., Kaul, R. K., Kothari, M., Kotwal, S., Koul, R., Tickoo, A. K., Sahayanathan, S., Sapru, M. L., Koul, M. K., & Sharma, M. (2005). TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element. 355-358. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.

@conference{ffef262bf2e44121abcd0b1a1668f758,

title = "TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element",

abstract = "We have observed the blazar Markarian 421 (z=0.031 ) with the TACTIC gamma- ray telescope having threshold energy of 1.5TeV at Mt. Abu Rajasthan India from January to April 2004. Observations were made in tracking mode for a total of 84(on) /16 (off-source) hours with its imaging element equipped with a 349- pixel PMTs camera. During this period, we find an evidence of a TeV gamma-ray signal with a statistical significance of 6.8 δ The differential energy spectrum derived in the energy range 2 - 9 TeV is well represented by a simple power law, with a differential spectral index of 2.80 ± 0.20.",

author = "Rannot, \{R. C.\} and P. Chandra and S. Thoudam and Yadav, \{K. K.\} and K. Venugopal and N. Bhatt and S. Bhattacharyya and Dhar, \{V. K.\} and Goyal, \{H. C.\} and S. Godambe and Kaul, \{R. K.\} and M. Kothari and S. Kotwal and R. Koul and Tickoo, \{A. K.\} and S. Sahayanathan and Sapru, \{M. L.\} and Koul, \{M. K.\} and M. Sharma",

year = "2005",

language = "British English",

pages = "355--358",

note = "29th International Cosmic Ray Conference, ICRC 2005 ; Conference date: 03-08-2005 Through 10-08-2005",

}

Rannot, RC, Chandra, P, Thoudam, S, Yadav, KK, Venugopal, K, Bhatt, N, Bhattacharyya, S, Dhar, VK, Goyal, HC, Godambe, S, Kaul, RK, Kothari, M, Kotwal, S, Koul, R, Tickoo, AK, Sahayanathan, S, Sapru, ML, Koul, MK & Sharma, M 2005, 'TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element', Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India, 3/08/05 - 10/08/05 pp. 355-358.

TY - CONF

T1 - TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element

AU - Rannot, R. C.

AU - Chandra, P.

AU - Thoudam, S.

AU - Yadav, K. K.

AU - Venugopal, K.

AU - Bhatt, N.

AU - Bhattacharyya, S.

AU - Dhar, V. K.

AU - Goyal, H. C.

AU - Godambe, S.

AU - Kaul, R. K.

AU - Kothari, M.

AU - Kotwal, S.

AU - Koul, R.

AU - Tickoo, A. K.

AU - Sahayanathan, S.

AU - Sapru, M. L.

AU - Koul, M. K.

AU - Sharma, M.

PY - 2005

Y1 - 2005

N2 - We have observed the blazar Markarian 421 (z=0.031 ) with the TACTIC gamma- ray telescope having threshold energy of 1.5TeV at Mt. Abu Rajasthan India from January to April 2004. Observations were made in tracking mode for a total of 84(on) /16 (off-source) hours with its imaging element equipped with a 349- pixel PMTs camera. During this period, we find an evidence of a TeV gamma-ray signal with a statistical significance of 6.8 δ The differential energy spectrum derived in the energy range 2 - 9 TeV is well represented by a simple power law, with a differential spectral index of 2.80 ± 0.20.

AB - We have observed the blazar Markarian 421 (z=0.031 ) with the TACTIC gamma- ray telescope having threshold energy of 1.5TeV at Mt. Abu Rajasthan India from January to April 2004. Observations were made in tracking mode for a total of 84(on) /16 (off-source) hours with its imaging element equipped with a 349- pixel PMTs camera. During this period, we find an evidence of a TeV gamma-ray signal with a statistical significance of 6.8 δ The differential energy spectrum derived in the energy range 2 - 9 TeV is well represented by a simple power law, with a differential spectral index of 2.80 ± 0.20.

UR - https://www.scopus.com/pages/publications/84898928119

M3 - Paper

AN - SCOPUS:84898928119

SP - 355

EP - 358

T2 - 29th International Cosmic Ray Conference, ICRC 2005

Y2 - 3 August 2005 through 10 August 2005

ER -

TeV γ-ray observations of the blazar markarian 421 from January to April 2004 with TACTIC imaging element

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