Observations of the unidentified TeV gamma-ray source TeV J2032+4130 with the Whipple Observatory 10 m telescope


Konopelko A., Atkins R. W. , Blaylock G., Buckley J. H. , Butt Y., Carter-Lewis D. A. , ...More

ASTROPHYSICAL JOURNAL, vol.658, no.2, pp.1062-1068, 2007 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 658 Issue: 2
  • Publication Date: 2007
  • Doi Number: 10.1086/511262
  • Title of Journal : ASTROPHYSICAL JOURNAL
  • Page Numbers: pp.1062-1068
  • Keywords: gamma rays : observations, radiation mechanisms : nonthermal, ATMOSPHERIC CHERENKOV TELESCOPE, STELLAR WINDS, CRAB-NEBULA, CYGNUS OB2, MILKY-WAY, FOLLOW-UP, ENERGIES, EMISSION, SEARCH, SYSTEM

Abstract

We report on observations of the sky region around the unidentified TeV gamma-ray source (TeV J2032+ 4130) carried out with the Whipple Observatory 10 m atmospheric Cerenkov telescope for a total of 65.5 hr between 2003 and 2005. The standard two-dimensional analysis developed by the Whipple collaboration for a stand-alone telescope reveals an excess in the field of view at a pretrial significance level of 6.1 sigma. The measured position of this excess is alpha = 20(h)32(m)27(s), delta = 41 degrees 39'17" (J2000.0). The estimated integral flux for this gamma-ray source is about 8% of the Crab Nebula flux. The data are consistent with a pointlike source. Here we present a detailed description of the standard two-dimensional analysis technique used for the analysis of data taken with the Whipple Observatory 10 m telescope and the results for the TeV J2032+ 4130 campaign. We include a short discussion of the physical mechanisms that may be responsible for the observed gamma-ray emission, based on possible association with known astrophysical objects, in particular, Cygnus OB2.