VHE observations of H1426+428 using TACTIC imaging telescope:2004

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

VHE observations of H1426+428 using TACTIC imaging telescope:2004

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

Physics

Bhabha Atomic Research Center

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

3 Scopus citations

Abstract

The BL Lac object H1426+428 (z=0.129) is an extreme synchrotron blazar and is a potential source for TeV γ -rays. The Whipple, HEGRA and CAT collaborations have reported VHE γ -ray detections from this object in 2002. We have also observed this source using the TACTIC imaging element (E _th >1.5 TeV) in the on/off mode of observation during the period March-April 2004. A total of ≈ 69 hours of clean data were recorded from the on-source direction. Detailed data analysis results do not show any evidence for the presence of a statistical significant TeV gamma-ray signal from the source direction. We have placed an upper limit of 0.2 × 10^-11photons cm^-2sec^-1 at 3 α confidence level on its VHE emission above threshold energy of TACTIC telescope.

Original language	British English
Pages	363-366
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

Thoudam, S., Yadav, K. K., Rannot, R. C., Sahayanathan, S., Sharma, M., Venugopal, K., Bhatt, N., Bhattacharyya, S., Chandra, P., Dhar, V. K., Goyal, H. C., Godambe, S., Kaul, R. K., Kothari, M., Kotwal, S., Koul, R., & Tickoo, A. K. (2005). VHE observations of H1426+428 using TACTIC imaging telescope:2004. 363-366. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.

@conference{2a5c25ef47bc4517a104e2db53e55c70,

title = "VHE observations of H1426+428 using TACTIC imaging telescope:2004",

abstract = "The BL Lac object H1426+428 (z=0.129) is an extreme synchrotron blazar and is a potential source for TeV γ -rays. The Whipple, HEGRA and CAT collaborations have reported VHE γ -ray detections from this object in 2002. We have also observed this source using the TACTIC imaging element (E th >1.5 TeV) in the on/off mode of observation during the period March-April 2004. A total of ≈ 69 hours of clean data were recorded from the on-source direction. Detailed data analysis results do not show any evidence for the presence of a statistical significant TeV gamma-ray signal from the source direction. We have placed an upper limit of 0.2 × 10-11photons cm-2sec-1 at 3 α confidence level on its VHE emission above threshold energy of TACTIC telescope.",

author = "S. Thoudam and Yadav, {K. K.} and Rannot, {R. C.} and S. Sahayanathan and M. Sharma and K. Venugopal and N. Bhatt and S. Bhattacharyya and P. Chandra 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.}",

year = "2005",

language = "British English",

pages = "363--366",

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

}

Thoudam, S, Yadav, KK, Rannot, RC, Sahayanathan, S, Sharma, M, Venugopal, K, Bhatt, N, Bhattacharyya, S, Chandra, P, Dhar, VK, Goyal, HC, Godambe, S, Kaul, RK, Kothari, M, Kotwal, S, Koul, R & Tickoo, AK 2005, 'VHE observations of H1426+428 using TACTIC imaging telescope:2004', Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India, 3/08/05 - 10/08/05 pp. 363-366.

TY - CONF

T1 - VHE observations of H1426+428 using TACTIC imaging telescope:2004

AU - Thoudam, S.

AU - Yadav, K. K.

AU - Rannot, R. C.

AU - Sahayanathan, S.

AU - Sharma, M.

AU - Venugopal, K.

AU - Bhatt, N.

AU - Bhattacharyya, S.

AU - Chandra, P.

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.

PY - 2005

Y1 - 2005

N2 - The BL Lac object H1426+428 (z=0.129) is an extreme synchrotron blazar and is a potential source for TeV γ -rays. The Whipple, HEGRA and CAT collaborations have reported VHE γ -ray detections from this object in 2002. We have also observed this source using the TACTIC imaging element (E th >1.5 TeV) in the on/off mode of observation during the period March-April 2004. A total of ≈ 69 hours of clean data were recorded from the on-source direction. Detailed data analysis results do not show any evidence for the presence of a statistical significant TeV gamma-ray signal from the source direction. We have placed an upper limit of 0.2 × 10-11photons cm-2sec-1 at 3 α confidence level on its VHE emission above threshold energy of TACTIC telescope.

AB - The BL Lac object H1426+428 (z=0.129) is an extreme synchrotron blazar and is a potential source for TeV γ -rays. The Whipple, HEGRA and CAT collaborations have reported VHE γ -ray detections from this object in 2002. We have also observed this source using the TACTIC imaging element (E th >1.5 TeV) in the on/off mode of observation during the period March-April 2004. A total of ≈ 69 hours of clean data were recorded from the on-source direction. Detailed data analysis results do not show any evidence for the presence of a statistical significant TeV gamma-ray signal from the source direction. We have placed an upper limit of 0.2 × 10-11photons cm-2sec-1 at 3 α confidence level on its VHE emission above threshold energy of TACTIC telescope.

UR - http://www.scopus.com/inward/record.url?scp=84898977688&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84898977688

SP - 363

EP - 366

T2 - 29th International Cosmic Ray Conference, ICRC 2005

Y2 - 3 August 2005 through 10 August 2005

ER -

VHE observations of H1426+428 using TACTIC imaging telescope:2004

Abstract

Conference

Other files and links

Fingerprint

Cite this