2013A&A...551A..96S


Query : 2013A&A...551A..96S

2013A&A...551A..96S - Astronomy and Astrophysics, volume 551A, 96-96 (2013/3-1)

RX J0123.4-7321, a Be/X-ray binary in the wing of the Small Magellanic Cloud.

STURM R., HABERL F., PIETSCH W. and UDALSKI A.

Abstract (from CDS):

To confirm faint Be/X-ray binary candidates from the XMM-Newton survey of the Small Magellanic Cloud, we searched for X-ray outbursts in archival ROSAT observations. We found that RXJ0123.4-7321 was much brighter when detected with ROSAT than seen 16 years later by XMM-Newton. We analysed the ROSAT observations and the OGLE I-band light curve of the optical counterpart to investigate the nature of the system. High long-term variability in the X-ray flux of a factor of ∼150 was found between the ROSAT and XMM-Newton detections, indicating strong outburst activity during the ROSAT observations. The I-band light curve reveals long-term variability and regular outbursts with a period of (119.9±2.5) days, indicating the orbital period of the binary system. The large X-ray flux variations and the properties of the optical counterpart confirm RXJ0123.4-7321 as a new Be/X-ray binary in the wing of the Small Magellanic Cloud.

Abstract Copyright:

Journal keyword(s): Magellanic Clouds - galaxies: stellar content - stars: emission-line, Be - stars: neutron - X-rays: binaries

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9904 1
2 [MA93] 1036 HXB 00 57 49.5743958452 -72 02 35.873771227   15.52 15.64     B0-B2III-V 52 0
3 SK 160 HXB 01 17 05.1447530244 -73 26 36.015353425 12.23 13.00 13.15   13.17 O9.7Ia+ 815 0
4 AzV 503 HXB 01 21 40.6226060932 -72 57 30.906642600   14.23 14.3     B0-5(II)e 38 0
5 DEM S 160 HII 01 23 22.4 -73 21 59           ~ 6 0
6 RX J0123.4-7321 HXB 01 23 27.4170599612 -73 21 22.241572271 14.48 15.39 15.45 15.42 15.4 B1-3(III) 10 0
7 SXP 1062 HXB 01 27 45.9422063191 -73 32 56.375836262   14.32 14.36     B0.5(III)e 65 1
8 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6020 1
9 IGR J05414-6858 HXB 05 41 26.0 -68 58 23           ~ 13 0

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2021.09.19-03:31:49

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