2011A&A...532A.153N

Query : 2011A&A...532A.153N

2011A&A...532A.153N - Astronomy and Astrophysics, volume 532A, 153-153 (2011/8-1)

Highly absorbed X-ray binaries in the Small Magellanic Cloud.

NOVARA G., LA PALOMBARA N., MEREGHETTI S., HABERL F., COE M., FILIPOVIC M., UDALSKI A., PAIZIS A., PIETSCH W., STURM R., GILFANOV M., TIENGO A., PAYNE J., SMITS D. and DE HORTA A.

Abstract (from CDS):

Many of the high mass X-ray binaries (HMXRBs) discovered in recent years in our Galaxy are characterized by a high absorption, most likely intrinsic to the system, that can impede their detection at the softest X-ray energies. Exploiting the good coverage obtained with sensitive XMM-Newton observations, we have undertaken a search for highly absorbed X-ray sources in the Small Magellanic Cloud (SMC), which is known to contain a large number of HMXRBs. After a systematic analysis of 62 XMM-Newton SMC observations, we obtained a sample of 30 sources with evidence of an equivalent hydrogen column density larger than 3x1023cm–2. Five of these sources are clearly identified as HMXRBs, four being previously known (including three X-ray pulsars) and one, XMMU J005605.8-720012, being reported here for the first time. For the latter, we present optical spectroscopy confirming the association with a Be star in the SMC. The other sources in our sample have optical counterparts fainter than magnitude ∼16 in the V band, and many have possible NIR counterparts consistent with highly reddened early-type stars in the SMC. While their number is broadly consistent with the expected population of background highly absorbed active galactic nuclei, a few of them could be HMXRBs in which an early-type companion is severely reddened by local material.

Abstract Copyright: ∼

Journal keyword(s): Magellanic Clouds - X-rays: general - X-rays: galaxies - X-rays: binaries

Simbad objects: 48

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Number of rows : 48
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 XMMU J004102.6-732530 X 00 41 02.69 -73 25 30.9           ~ 1 1
2 IRSF J00410291-7325332 IR 00 41 02.9 -73 25 33   22.00 20.79     ~ 1 1
3 IRSF J00421082-7330127 IR 00 42 10.8 -73 30 13   20.36 19.31     ~ 1 1
4 XMMU J004210.9-733011 X 00 42 10.90 -73 30 11.8           ~ 1 1
5 [FBR2002] J004226-730419 AGN 00 42 26.55 -73 04 19.3         17.97 ~ 7 1
6 XMMU J004244.7-732356 X 00 42 44.77 -73 23 56.4           ~ 1 1
7 2MASS J00424550-7323553 RB? 00 42 45.508 -73 23 55.36   20.00 19.07   15.62 ~ 2 1
8 XMMU J004536.2-724131 X 00 45 36.23 -72 41 31.3           ~ 1 1
9 IRSF J00453646-7241343 IR 00 45 36.5 -72 41 34   20.16 19.43     ~ 1 1
10 SXP 25.5 HXB 00 48 14.1209478096 -73 10 03.933642936 15.06 15.56 15.847   15.693 B1.5e 28 1
11 MQS J004818.65-732100.1 QSO 00 48 18.6544401408 -73 21 00.134221356   16.43 16.57   16.69 ~ 10 0
12 S3MC J004853.39-732457.31 Y*? 00 48 53.40 -73 24 57.4         17.19 ~ 6 0
13 XMMU J004911.5-731717 * 00 49 10.8828127497 -73 17 17.571902709           ~ 3 1
14 IRSF J00491089-7317172 IR 00 49 10.9 -73 17 17   19.80 18.80     ~ 1 1
15 IRSF J00502062-7209073 IR 00 50 20.6 -72 09 07           ~ 1 1
16 XMMU J005020.7-720907 X 00 50 20.648 -72 09 07.24           ~ 2 1
17 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11142 1
18 XMMU J005307.4-722358 AG? 00 53 07.446 -72 23 58.69           ~ 2 0
19 XMMU J005322.1-715927 AG? 00 53 22.133 -71 59 27.82           ~ 2 0
20 XMMU J005605.8-720012 HXB 00 56 05.481 -72 00 11.11           B2-B3Ve 5 1
21 IRSF J00560575-7200118 IR 00 56 05.7 -72 00 12   16.60 16.71     ~ 1 1
22 XMMU J005722.4-713114 X 00 57 22.44 -71 31 14.8           ~ 1 0
23 XMMU J005724.1-715918 AG? 00 57 24.162 -71 59 18.94           ~ 2 0
24 XMMU J005732.5-712926 X 00 57 32.51 -71 29 26.3           ~ 1 0
25 [MA93] 1020 HXB 00 57 36.0162576624 -72 19 34.056483744 14.89 15.95 16.008 15.79 15.806 B0/4e 42 0
26 RX J0058.2-7231 HXB 00 58 12.5869662000 -72 30 48.759613812 13.91 14.98 14.87   14.62 B0IIIe 60 0
27 2MASS J01011534-7216376 AG? 01 01 15.4248885336 -72 16 38.171475156   20.51 19.23     ~ 3 0
28 IRSF J01023342-7234421 IR 01 02 33.4 -72 34 42   20.78 19.64     ~ 1 1
29 XMMU J010233.4-723442 AG? 01 02 33.496 -72 34 42.01           ~ 2 1
30 IRSF J01024839-7308213 IR 01 02 48.4 -73 08 21   22.03 20.99     ~ 1 1
31 XMMU J010248.4-730818 AG? 01 02 48.404 -73 08 18.73           ~ 2 1
32 [MA93] 1393 HXB 01 03 37.5349856136 -72 01 33.204096336   14.54 14.65     B0III-V 73 0
33 XMMU J010432.5-722543 X 01 04 32.56 -72 25 43.6           ~ 1 1
34 IRSF J01043305-7225407 IR 01 04 33.1 -72 25 41   17.61 16.23     ~ 1 1
35 XMMU J010802.9-722627 X 01 08 02.644 -72 26 25.59           ~ 2 0
36 IRSF J01081153-7210048 IR 01 08 11.5 -72 10 05           ~ 1 1
37 XMMU J010811.5-721006 AG? 01 08 11.554 -72 10 06.50           ~ 2 1
38 XMMU J010831.4-730630 X 01 08 31.40 -73 06 30.9           ~ 1 1
39 IRSF J01083147-7306325 RB? 01 08 31.4856094920 -73 06 32.462256132 19.28 18.84 17.88   16.91 ~ 2 1
40 XMMU J010842.6-723839 X 01 08 42.68 -72 38 39.6           ~ 1 1
41 IRSF J01084310-7238375 IR 01 08 43.1 -72 38 37   20.37 19.53     ~ 1 1
42 IRSF J01090778-7206438 IR 01 09 07.8 -72 06 44   21.70 21.13     ~ 1 1
43 XMMU J010908.0-720642 X 01 09 08.09 -72 06 42.1           ~ 1 1
44 XMMU J011339.7-724733 X 01 13 39.74 -72 47 33.3           ~ 1 0
45 XMMU J011434.7-730729 AG? 01 14 34.751 -73 07 29.07           ~ 2 0
46 SK 160 HXB 01 17 05.1457288392 -73 26 36.014808156 12.23 13.00 13.15   13.17 O9.7Ia+ 858 0
47 XMMU J011807.8-731713 X 01 18 07.971 -73 17 09.62           ~ 2 0
48 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7059 0

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