INTEGRAL observations of the Perseus cluster

被引：8
|
作者：
Eckert, D. [1 ]
Paltani, S. [1 ]
机构：
[1] Univ Geneva, Observ Geneva, ISDC Data Ctr Astrophys, CH-1290 Versoix, Switzerland
来源：
ASTRONOMY & ASTROPHYSICS | 2009年 / 495卷 / 02期
关键词：
galaxies: clusters: individual: Perseus cluster; X-rays: galaxies: clusters; gamma rays: observations; X-RAY-EMISSION; COOLING FLOWS; COSMIC-RAYS; GAMMA-RAY; GALAXIES; SPECTRUM; ORIGIN; IMAGER; HALOS; CORE;
D O I：
10.1051/0004-6361:200811154
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the results of a 500 ks observation of the Perseus cluster with INTEGRAL, with the aim of investigating the possible diffuse non-thermal component detected in a previous Chandra observation. In the 3-20 keV band with the JEM-X instrument, we detect the source with high significance and resolve it spatially. Above 20 keV with IBIS/ISGRI, we find that the source is point-like, and the cluster could be detected up to 120 keV. From the broad-band ISGRI/JEM-X spectrum, although we detect a non-thermal component, we find that the high-energy flux is variable and is consistent with the extrapolation of the 2-10 keV flux of the central AGN, NGC 1275. The extrapolation of the non-thermal component claimed from Chandra data exceeds the INTEGRAL spectrum by a factor of 3.
引用
收藏
页码：415 / 420
页数：6
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