2006MNRAS.373.1627W

Query : 2006MNRAS.373.1627W

2006MNRAS.373.1627W - Mon. Not. R. Astron. Soc., 373, 1627-1632 (2006/December-3)

On the compact nature of the most luminous ULX in the Cartwheel ring.

WOLTER A., TRINCHIERI G. and COLPI M.

Abstract (from CDS):

We report the first detection of flux variability in the most luminous X-ray source in the southern ring of the Cartwheel galaxy. XMM-Newton data show that the luminosity has varied over a time-scale of 6 months from L0.5–10keV∼ 1.3x1041erg/s, consistent with the previous Chandra observation, to L0.5–10keV≲ 6.4x1040erg/s. This fact provides the first evidence that the source is compact in nature and is not a collection of individual fainter sources, such as supernova remnants. The source has been repeatedly observed at the very high-luminosity level of L0.5–10keV∼ 1.3x1041erg/s for a period of at least 4 yr before dimming at the current level. It represents then the first example of an accreting object revealed in a long-lived state of extremely high luminosity.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): black hole physics - galaxies: individual: Cartwheel - X-rays: binaries - X-rays: galaxies

CDS comments: Sources N.7, 9, 10, 13, 14, 16 and 17 are [WT2004] 7, 9, 10, 13, 14, 16 and 17 in Simbad.

Simbad objects: 17

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Number of rows : 17
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 CXOU J003737.5-334256 HII 00 37 37.5 -33 42 59           ~ 9 0
2 CXOU J003737.6-334254 HII 00 37 37.5 -33 42 53           ~ 8 0
3 CXOU J003738.7-334316 HII 00 37 38.6 -33 43 17           ~ 8 0
4 CXOU J003738.7-334318 HII 00 37 38.8 -33 43 18           ~ 9 0
5 CXO J003739.3-334323 HXB 00 37 39.39 -33 43 23.3           ~ 16 0
6 CXOU J003740.8-334330 HII 00 37 41.0 -33 43 32           ~ 8 0
7 MCG-06-02-022a EmG 00 37 41.1133192392 -33 42 58.515101748   19.26   18.52   ~ 314 1
8 CXOU J003741.1-334332 HII 00 37 41.2 -33 43 31           ~ 10 0
9 NGC 2276 AG? 07 27 14.485 +85 45 16.20   12.3       ~ 393 0
10 2CXO J095550.1+694046 HXB 09 55 50.12 +69 40 46.4           ~ 294 1
11 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
12 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
13 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
14 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
15 MCG-03-34-063 Sy2 13 22 19.0228826784 -16 42 30.084610752   14   13.77   ~ 60 3
16 NGC 7714 AGN 23 36 14.1257730600 +02 09 18.197422668   14.91 14.36     ~ 788 1
17 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 608 0

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