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Evidence for TeV gamma ray emission from TeV J2032+4130 in Whipple archival data

By M.J. Lang, D.A. Carter-Lewis, D.J. Fegan, S.J. Fegan, A.M. Hillas, R.C. Lamb, M. Punch, P.T. Reynolds and T.C. Weekes

Abstract

A reanalysis of data taken on the Cygnus region in 1989-90 using the Whipple Observatory atmospheric Cherenkov imaging telescope confirms the existence of the TeV J2032+4130 source reported by the Crimean Astrophysical Observatory and published by the HEGRA Collaboration. The significance at the a priori HEGRA position is 3.3sigma. The peak signal was found at RA=20hr32min, Dec=+41deg33min. This is 0.6deg north of Cygnus X-3 which was the original target of the observations. The flux level (12% of the level of the Crab Nebula) is intermediate between the two later observations and suggests that the TeV source is variable

Topics: [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Publisher: EDP Sciences
Year: 2004
DOI identifier: 10.1051/0004-6361:20041021
OAI identifier: oai:HAL:in2p3-00022201v1
Provided by: Hal-Diderot
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