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

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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",

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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.

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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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