Is there a hard tail in the Coma Cluster X-ray spectrum?
Astrophysics
2009-11-10 v1
Abstract
We report results from a re-analysis of the BeppoSAX observation of Coma and from the analysis of a second, yet unpublished observation of the same object. From our re-analysis of the first observation we find that the statistical evidence for a hard tail is about 2 sigma. From the analysis of the second observation which, thanks to the lower background and the longer exposure time, is characterized by a larger signal to noise we find no evidence for a hard tail. From the upper limit on the flux of the hard tail, using the standard Inverse Compton formulae, we derive a lower limit for the magnetic of about 0.2-0.4 microGauss consistent with Faraday rotation measurements.
Cite
@article{arxiv.astro-ph/0312447,
title = {Is there a hard tail in the Coma Cluster X-ray spectrum?},
author = {Mariachiara Rossetti and Silvano Molendi},
journal= {arXiv preprint arXiv:astro-ph/0312447},
year = {2009}
}
Comments
4 pages, 2 figures, to appear in A&A Letters