Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope

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

doi:10.1088/0954-3899/36/8/085201

Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope

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

Physics

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The BL Lac object H1426+428 (z ≡ 0.129) is an established source of TeV γ-rays and detections of these photons from this object also have important implications for estimating the extragalactic background light in addition to the understanding of the particle acceleration and γ-ray production mechanisms in the AGN jets. We have observed this source for about 244 h in 2004, 2006 and 2007 with the TACTIC γ-ray telescope located at Mt Abu, India. Detailed analysis of these data do not indicate the presence of any statistically significant TeV γ-ray signal from the source direction. Accordingly, we have placed an upper limit of ≤1.18 × 10^-12 photons cm^-2 s^-1 on the integrated γ-ray flux at 3σ significance level.

Original language	British English
Article number	085201
Journal	Journal of Physics G: Nuclear and Particle Physics
Volume	36
Issue number	8
DOIs	https://doi.org/10.1088/0954-3899/36/8/085201
State	Published - 2009

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Yadav, K. K., Rannot, R. C., Chandra, P., Tickoo, A. K., Thoudam, S., Venugopal, K., Bhatt, N., Bhattacharyya, S., Chanchalani, K., Dhar, V. K., Godambe, S. V., Goyal, H. C., Kothari, M., Kotwal, S., Koul, M. K., Koul, R., Sahaynathan, S., & Sharma, M. (2009). Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope. Journal of Physics G: Nuclear and Particle Physics, 36(8), Article 085201. https://doi.org/10.1088/0954-3899/36/8/085201

@article{5e8279a165cd45aca41f54fe3abaa0be,

title = "Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope",

abstract = "The BL Lac object H1426+428 (z ≡ 0.129) is an established source of TeV γ-rays and detections of these photons from this object also have important implications for estimating the extragalactic background light in addition to the understanding of the particle acceleration and γ-ray production mechanisms in the AGN jets. We have observed this source for about 244 h in 2004, 2006 and 2007 with the TACTIC γ-ray telescope located at Mt Abu, India. Detailed analysis of these data do not indicate the presence of any statistically significant TeV γ-ray signal from the source direction. Accordingly, we have placed an upper limit of ≤1.18 × 10-12 photons cm-2 s-1 on the integrated γ-ray flux at 3σ significance level.",

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

year = "2009",

doi = "10.1088/0954-3899/36/8/085201",

language = "British English",

volume = "36",

journal = "Journal of Physics G: Nuclear and Particle Physics",

issn = "0954-3899",

publisher = "IOP Publishing Ltd.",

number = "8",

}

Yadav, KK, Rannot, RC, Chandra, P, Tickoo, AK, Thoudam, S, Venugopal, K, Bhatt, N, Bhattacharyya, S, Chanchalani, K, Dhar, VK, Godambe, SV, Goyal, HC, Kothari, M, Kotwal, S, Koul, MK, Koul, R, Sahaynathan, S & Sharma, M 2009, 'Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope', Journal of Physics G: Nuclear and Particle Physics, vol. 36, no. 8, 085201. https://doi.org/10.1088/0954-3899/36/8/085201

TY - JOUR

T1 - Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope

AU - Yadav, K. K.

AU - Rannot, R. C.

AU - Chandra, P.

AU - Tickoo, A. K.

AU - Thoudam, S.

AU - Venugopal, K.

AU - Bhatt, N.

AU - Bhattacharyya, S.

AU - Chanchalani, K.

AU - Dhar, V. K.

AU - Godambe, S. V.

AU - Goyal, H. C.

AU - Kothari, M.

AU - Kotwal, S.

AU - Koul, M. K.

AU - Koul, R.

AU - Sahaynathan, S.

AU - Sharma, M.

PY - 2009

Y1 - 2009

N2 - The BL Lac object H1426+428 (z ≡ 0.129) is an established source of TeV γ-rays and detections of these photons from this object also have important implications for estimating the extragalactic background light in addition to the understanding of the particle acceleration and γ-ray production mechanisms in the AGN jets. We have observed this source for about 244 h in 2004, 2006 and 2007 with the TACTIC γ-ray telescope located at Mt Abu, India. Detailed analysis of these data do not indicate the presence of any statistically significant TeV γ-ray signal from the source direction. Accordingly, we have placed an upper limit of ≤1.18 × 10-12 photons cm-2 s-1 on the integrated γ-ray flux at 3σ significance level.

AB - The BL Lac object H1426+428 (z ≡ 0.129) is an established source of TeV γ-rays and detections of these photons from this object also have important implications for estimating the extragalactic background light in addition to the understanding of the particle acceleration and γ-ray production mechanisms in the AGN jets. We have observed this source for about 244 h in 2004, 2006 and 2007 with the TACTIC γ-ray telescope located at Mt Abu, India. Detailed analysis of these data do not indicate the presence of any statistically significant TeV γ-ray signal from the source direction. Accordingly, we have placed an upper limit of ≤1.18 × 10-12 photons cm-2 s-1 on the integrated γ-ray flux at 3σ significance level.

UR - https://www.scopus.com/pages/publications/70350719828

U2 - 10.1088/0954-3899/36/8/085201

DO - 10.1088/0954-3899/36/8/085201

M3 - Article

AN - SCOPUS:70350719828

SN - 0954-3899

VL - 36

JO - Journal of Physics G: Nuclear and Particle Physics

JF - Journal of Physics G: Nuclear and Particle Physics

IS - 8

M1 - 085201

ER -

Search for TeV γ-rays from H1426+428 during 2004-2007 with the TACTIC telescope

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