2001A&A...374.1009C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:15:16

2001A&A...374.1009C - Astronomy and Astrophysics, volume 374, 1009-1016 (2001/8-2)

The discovery and study of the optical counterparts of the transient X-ray pulsars RX J0052.1-7319 and XTE J0111.2-7317 in the SMC.

COVINO S., NEGUERUELA I., CAMPANA S., ISRAEL G.L., POLCARO V.F., STELLA L. and VERRECCHIA F.

Abstract (from CDS):

We report on the discovery and confirmation of the optical counterparts of the two transient X-ray pulsars, RX J0052.1-7319 and XTE J0111.2-7317. In the narrow (∼3'' radius) X-ray error circle of RX J0052.1-7319 we found a V=14.6 (B-V=0.1) 09.5IIIe (a classification as a B0Ve star is also possible, since the luminosity class depends on the uncertainty on the adopted reddening). Medium resolution spectra for this object show Balmer lines in emission with an equivalent width of Hα=-12/-16Å. In the X-ray error box of XTE J0111.2-7317 we found a relatively bright object (V=15.4, B-V=0.06) which has been classified as a B0.5-B1Ve star and that was later confirmed by Coe et al. (2000) as the most plausible counterpart for XTE J0111.2-7317. Also in this case we easily detect Balmer emission lines with an Hα equivalent width of about -21Å. There is also evidence for the presence of a surrounding nebula, possibly a supernova remnant. A further bright B0Ve star was found just outside the X-ray error circle of XTE J0111.2-7317. We discuss the implication of these results in the light of the current knowledge of Be/X-ray binary systems in the Magellanic Clouds and within our Galaxy.

Abstract Copyright:

Journal keyword(s): pulsars: individual (RX J0052.1-7319, XTE J0111.2-7317) - stars: neutron - X-ray: stars

Simbad objects: 3

goto Full paper

goto View the reference in ADS

Number of rows : 3

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 LIN 203 HXB 00 52 13.9960952088 -73 19 18.814054598   14.66 14.67   14.534 O9.5IIIe/B0Ve 78 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9695 1
3 RX J0111.2-7317 HXB 01 11 08.5772485083 -73 16 46.307693953 14.40 15.42 15.52   15.29 B0.5-1Ve 71 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...374.1009C and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-02:15:16

© Université de Strasbourg/CNRS

    • Contact