MAGIC observations of the unidentified TeV gamma-ray source TeV J2032+4130

Abstract

We observed the first known very high energy (VHE) gamma-ray emitting unidentified source, TeV J2032+4130, for 94 hours with the MAGIC telescope. The source was detected with a significance of 5.6 sigma. The flux, position, and angular extension are compatible with the previous ones measured by the HEGRA telescope system five years ago. The integral flux amounts to (4.5+-0.3stat+-0.35sys)x10^{-13} ph cm${}^{-2}$ s${}^{-1}$ above 1 TeV. The source energy spectrum, obtained with the lowest energy threshold to date, is compatible with a single power law with a hard photon index of Gamma=-2.0+-0.3stat+-0.2sys.

4 pages, 3 figures, accepted for publication in The Astrophysical Journal Letters. Corrected typos

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• Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope
• XMM-Newton observations of the first unidentified TeV gamma-ray source TeV J2032+4130
• The population of radio sources in the field of the unidentified gamma-ray source TeV J2032+4130
• Very high energy gamma-ray observations during moonlight and twilight with the MAGIC telescope
• Deep radio images of the HEGRA and Whipple TeV sources in the Cygnus OB2 region
• A radio and infrared exploration of the Cygnus X-3 environments

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