Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes

S. V. Godambe; S. Thoudam; R. C. Rannot; P. Chandra; S. Sahaynathan; M. Sharma; K. Venugopal; N. Bhatt; S. Bhattacharyya; V. K. Dhar; H. C. Goyal; R. K. Kaul; M. Kothari; S. Kotwal; R. Koul; K. K. Yadav; A. K. Tickoo; K. S. Baliyan; U. C. Joshi; S. Ganesh; C. Shah; A. Ohlan

Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes

S. V. Godambe, S. Thoudam, R. C. Rannot, P. Chandra, S. Sahaynathan, M. Sharma, K. Venugopal, N. Bhatt, S. Bhattacharyya, V. K. Dhar, H. C. Goyal, R. K. Kaul, M. Kothari, S. Kotwal, R. Koul, K. K. Yadav, A. K. Tickoo, K. S. Baliyan, U. C. Joshi, S. GaneshC. Shah, A. Ohlan

Physics

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

2 Scopus citations

Abstract

1ES2344+514 (z = 0.04) is one of the first BL Lac objects to be reported as an extreme synchrotron blazar with synchotron peak energy reaching up to 100keV and was discovered as a source of Very High Energy (VHE) gamma- rays by the Whipple group in 1995. Subsequently, it was observed by the HEGRA group in 1997/98 and 2002. We have recently (Oct.- Dec. 2004) observed the 1ES2344+514 using the imaging element of the TACTIC array and have collected data for 53 hours in on/off mode. The source was also observed in near infrared bands J, H and K, for some nights using NICMOS-3 array mounted on 1.2m MIRO infrared telescope. Such a study is expected to provide clues to the dominance or otherwise of the Compton component. After detailed analysis of the TACTIC data we have placed an upper limit of ≤ 4.2 × 10^-12 photons cm ^-2 s^-1 at a 3 δ confidence level on the gamma-ray flux from the source. In the near infrared band the source shows low level variations without any flaring activity.

Original language	British English
Pages	347-350
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

Godambe, S. V., Thoudam, S., Rannot, R. C., Chandra, P., Sahaynathan, S., Sharma, M., Venugopal, K., Bhatt, N., Bhattacharyya, S., Dhar, V. K., Goyal, H. C., Kaul, R. K., Kothari, M., Kotwal, S., Koul, R., Yadav, K. K., Tickoo, A. K., Baliyan, K. S., Joshi, U. C., ... Ohlan, A. (2005). Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes. 347-350. Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India.

@conference{52845d8326ec43efa2175135879972de,

title = "Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes",

abstract = "1ES2344+514 (z = 0.04) is one of the first BL Lac objects to be reported as an extreme synchrotron blazar with synchotron peak energy reaching up to 100keV and was discovered as a source of Very High Energy (VHE) gamma- rays by the Whipple group in 1995. Subsequently, it was observed by the HEGRA group in 1997/98 and 2002. We have recently (Oct.- Dec. 2004) observed the 1ES2344+514 using the imaging element of the TACTIC array and have collected data for 53 hours in on/off mode. The source was also observed in near infrared bands J, H and K, for some nights using NICMOS-3 array mounted on 1.2m MIRO infrared telescope. Such a study is expected to provide clues to the dominance or otherwise of the Compton component. After detailed analysis of the TACTIC data we have placed an upper limit of ≤ 4.2 × 10-12 photons cm -2 s-1 at a 3 δ confidence level on the gamma-ray flux from the source. In the near infrared band the source shows low level variations without any flaring activity.",

author = "Godambe, {S. V.} and S. Thoudam and Rannot, {R. C.} and P. Chandra and S. Sahaynathan and M. Sharma and K. Venugopal and N. Bhatt and S. Bhattacharyya and Dhar, {V. K.} and Goyal, {H. C.} and Kaul, {R. K.} and M. Kothari and S. Kotwal and R. Koul and Yadav, {K. K.} and Tickoo, {A. K.} and Baliyan, {K. S.} and Joshi, {U. C.} and S. Ganesh and C. Shah and A. Ohlan",

year = "2005",

language = "British English",

pages = "347--350",

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

}

Godambe, SV, Thoudam, S, Rannot, RC, Chandra, P, Sahaynathan, S, Sharma, M, Venugopal, K, Bhatt, N, Bhattacharyya, S, Dhar, VK, Goyal, HC, Kaul, RK, Kothari, M, Kotwal, S, Koul, R, Yadav, KK, Tickoo, AK, Baliyan, KS, Joshi, UC, Ganesh, S, Shah, C & Ohlan, A 2005, 'Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes', Paper presented at 29th International Cosmic Ray Conference, ICRC 2005, Pune, India, 3/08/05 - 10/08/05 pp. 347-350.

TY - CONF

T1 - Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes

AU - Godambe, S. V.

AU - Thoudam, S.

AU - Rannot, R. C.

AU - Chandra, P.

AU - Sahaynathan, S.

AU - Sharma, M.

AU - Venugopal, K.

AU - Bhatt, N.

AU - Bhattacharyya, S.

AU - Dhar, V. K.

AU - Goyal, H. C.

AU - Kaul, R. K.

AU - Kothari, M.

AU - Kotwal, S.

AU - Koul, R.

AU - Yadav, K. K.

AU - Tickoo, A. K.

AU - Baliyan, K. S.

AU - Joshi, U. C.

AU - Ganesh, S.

AU - Shah, C.

AU - Ohlan, A.

PY - 2005

Y1 - 2005

N2 - 1ES2344+514 (z = 0.04) is one of the first BL Lac objects to be reported as an extreme synchrotron blazar with synchotron peak energy reaching up to 100keV and was discovered as a source of Very High Energy (VHE) gamma- rays by the Whipple group in 1995. Subsequently, it was observed by the HEGRA group in 1997/98 and 2002. We have recently (Oct.- Dec. 2004) observed the 1ES2344+514 using the imaging element of the TACTIC array and have collected data for 53 hours in on/off mode. The source was also observed in near infrared bands J, H and K, for some nights using NICMOS-3 array mounted on 1.2m MIRO infrared telescope. Such a study is expected to provide clues to the dominance or otherwise of the Compton component. After detailed analysis of the TACTIC data we have placed an upper limit of ≤ 4.2 × 10-12 photons cm -2 s-1 at a 3 δ confidence level on the gamma-ray flux from the source. In the near infrared band the source shows low level variations without any flaring activity.

AB - 1ES2344+514 (z = 0.04) is one of the first BL Lac objects to be reported as an extreme synchrotron blazar with synchotron peak energy reaching up to 100keV and was discovered as a source of Very High Energy (VHE) gamma- rays by the Whipple group in 1995. Subsequently, it was observed by the HEGRA group in 1997/98 and 2002. We have recently (Oct.- Dec. 2004) observed the 1ES2344+514 using the imaging element of the TACTIC array and have collected data for 53 hours in on/off mode. The source was also observed in near infrared bands J, H and K, for some nights using NICMOS-3 array mounted on 1.2m MIRO infrared telescope. Such a study is expected to provide clues to the dominance or otherwise of the Compton component. After detailed analysis of the TACTIC data we have placed an upper limit of ≤ 4.2 × 10-12 photons cm -2 s-1 at a 3 δ confidence level on the gamma-ray flux from the source. In the near infrared band the source shows low level variations without any flaring activity.

UR - http://www.scopus.com/inward/record.url?scp=84898990969&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84898990969

SP - 347

EP - 350

T2 - 29th International Cosmic Ray Conference, ICRC 2005

Y2 - 3 August 2005 through 10 August 2005

ER -

Very high energy gamma-ray and near infrared observations of 1ES2344+514 with TACTIC and MIRO telescopes

Abstract

Conference

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