HEGRA discovery of the first unidentified TeV source
نویسندگان
چکیده
The first unidentified TeV source in the Cygnus region is confirmed by follow-up observations carried out in 2002 with the HEGRA stereoscopic system of air Cherenkov telescopes. Using the combined 279 h of data, this new source TeV J2032+4130, appears to be steady in flux over the four years of data taking, it shows an extension with radius 6.20, and has a hard spectrum with photon index 1:9 between 1 and 10 TeV. Its location places it at the edge of the core of the extremely dense stellar OB association, Cygnus OB2. Its integral flux above energies E > 1 TeV amounts to 3% of the Crab nebula flux. No counterpart at radio, optical, nor X-ray energies is as-yet seen, leaving TeV J2032+4130 presently unidentified. Summarized here are observational parameters of this source and brief astrophysical interpretation. 2003 Elsevier B.V. All rights reserved.
منابع مشابه
The New Unidentified TeV Source in Cygnus (TeV J2032+4130): HEGRA IACT-System Results
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