Coma revealed as an extended hard X-rays source by INTEGRAL IBIS/ISGRI

Free access article

Issue		A&A Volume 453, Number 1, July I 2006


Page(s)		L5 - L8
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:20065157

A&A 453, L5-L8 (2006)
DOI: 10.1051/0004-6361:20065157

Letter

Coma revealed as an extended hard X-rays source by INTEGRAL IBIS/ISGRI

M. Renaud^{1, 2}, G. Bélanger^{1, 2}, J. Paul^{1, 2}, F. Lebrun^{1, 2} and R. Terrier²

¹ Service d'Astrophysique, CEA-Saclay, 91191 Gif-Sur-Yvette, France
e-mail: mrenaud@cea.fr
² APC-UMR 7164, 11 place M. Berthelot, 75231 Paris, France

(Received 7 March 2006 / Accepted 26 April 2006)

Abstract
Aims.We report the INTEGRAL/IBISobservations of the Coma Clusterin the hard X-ray/soft $\gamma$ -raydomain.
Methods.Since the Coma Clusterappears as an extended source, its global intensity and significance cannot be directly extracted with standard coded mask analysis. We used the method of imaging the extended sources with a coded mask telescope developed by Renaud et al. (2006).
Results.The imaging capabilities and the sensitivity of the IBIS/ISGRIcoded mask instrument allows us to identify for the first time the site of the emission above ~15 keV. We have studied the Coma Clustermorphology in the 18-30 keV band and found that it follows the prediction based on X-rayobservations. We also bring constraints on the non-thermal mechanism contribution at higher energies.

Key words: galaxies: clusters: Coma Cluster -- methods: data analysis -- gamma rays: observations -- X-rays: galaxies: clusters

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.

If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.