Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apre11004p&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
The BL Lac 1H1426+428 has a redshift of 0.129 and was recently discovered as a TeV gamma source with the Whipple Cherenkov telescope. We have re-analysed the data used in this discovery to extract further spectral information. Due to the weakness of the signal, the spectrum cannot be determined with high accuracy but even a rough comparison with the spectra of the two brightest northern-hemisphere blazars, Mkn 421 and Mkn 501, around 500 GeV yields important clues to the magnitude of gamma-ray absorption in the cosmic infrared background.
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