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

Cite this

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 - http://www.scopus.com/inward/record.url?scp=84898928119&partnerID=8YFLogxK

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

Abstract

Conference

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