2009ApJ...690..367A

Query : 2009ApJ...690..367A

2009ApJ...690..367A - Astrophys. J., 690, 367-388 (2009/January-1)

Galaxy clusters in the Swift/Burst Alert Telescope era: hard X-rays in the intracluster medium.

AJELLO M., REBUSCO P., CAPPELLUTI N., REIMER O., BOHRINGER H., GREINER J., GEHRELS N., TUELLER J. and MORETTI A.

Abstract (from CDS):

We report the detection of 10 clusters of galaxies in the ongoing Swift/Burst Alert Telescope (BAT) all-sky survey. This sample, which mostly comprises merging clusters, was serendipitously detected in the 15-55 keV band. We use the BAT sample to investigate the presence of excess hard X-rays above the thermal emission. The BAT clusters do not show significant (e.g., ≥2σ) nonthermal hard X-ray emission. The only exception is represented by Perseus whose high-energy emission is likely due to NGC 1275. Using XMM-Newton, Swift/XRT, Chandra and BAT data, we are able to produce upper limits of the inverse Compton (IC) emission mechanism which are in disagreement with most of the previously-claimed hard X-ray excesses. The coupling of the X-ray upper limits of the IC mechanism to radio data shows that, in some clusters, the magnetic field might be larger than 0.5 µG. We also derive the first log N-log S and luminosity function distributions of galaxy clusters above 15 keV.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - galaxies: clusters: general - magnetic fields - radiation mechanisms: non-thermal - X-rays: general

Nomenclature: Table 1: [ARC2009] JHHMM.m+DDMM N=10.

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2277 1
2 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4028 4
3 ACO 3266 ClG 04 31 11.9 -61 24 23           ~ 412 0
4 ClG 0745-19 ClG 07 47 31.3 -19 17 40           ~ 373 0
5 2MASX J07473129-1917403 BiC 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 411 1
6 ACO 754 ClG 09 09 08.4 -09 39 58           ~ 670 1
7 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4824 2
8 ACO 3571 ClG 13 47 28.9 -32 51 57           ~ 286 2
9 ACO 2029 ClG 15 10 56.2 +05 44 42           ~ 946 0
10 ACO 2142 ClG 15 58 14.38 +27 12 57.8           ~ 773 0
11 2E 3542 Sy1 15 58 29.3628222264 +27 17 14.202585888   17.67 17.37     ~ 37 2
12 BAX 249.5848-64.5165 ClG 16 38 16.1 -64 20 50           ~ 116 0
13 NAME Oph Cluster ClG 17 12 24.7 -23 21 01           ~ 274 0
14 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 463 1

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