HEGRA discovery of the first unidentified TeV source

Details HEGRA discovery of the first unidentified TeV source HEGRA discovery of the first unidentified TeV source

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newar..48..489h&link_type=abstract

New Astronomy Reviews, Volume 48, Issue 5-6, p. 489-492.

Astronomy and Astrophysics

Astronomy

5

Unidentified Tev Source, Hegra, Imaging Air Cherenkov, Stereoscopic Observations, Cosmic Rays, Multiwavelength Observations, Γ-Ray, X-Ray, Radio

Scientific paper

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 6.2', 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.

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