Abstract
Abstract
We report on Cosmic Origin Spectrograph observations of the gamma-ray bright
blazar B2 1215+30, collected in 2015 November. These observations allow for
the confirmation of the source redshift from the detection of a
Lyα emission feature at
λ ∼ 1374 Å. The emission feature
places the source at a redshift of
z = 0.1305 ± 0.003,
confirming the source’s ground-based spectral measurement. The gamma-ray
emission of the source is discussed in the context of the source distance,
required for the accurate reconstruction of the intrinsic gamma-ray emission
taking the absorption by the extragalactic background light into account. The
source distance is found to be low enough that the previously reported detection
of an exceptional flaring event from B2 1215+30 in 2014 cannot be used to
investigate opacity-specific spectral and variability characteristics introduced
by possible ultra-high-energy cosmic-ray propagation.
Publisher
American Astronomical Society
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
4 articles.
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