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.

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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 - 2026 		#notes
1 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
2 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
3 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
4 PKS 0745-19 rG 07 47 31.3247085936 -19 17 40.013334276   19.60       ~ 422 1
5 ClG 0745-1910 ClG 07 47 32.4 -19 18 23           ~ 378 0
6 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
7 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
8 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
9 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
10 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
11 2E 3542 Sy1 15 58 29.3628222264 +27 17 14.202585888   17.67 17.37     ~ 39 1
12 BAX 249.5848-64.5165 ClG 16 38 13.2 -64 21 21           ~ 123 0
13 BAX 258.1082-23.3759 ClG 17 12 26.3 -23 21 38           ~ 303 0
14 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1

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