SIMBAD references

2016MNRAS.462.3823L - Mon. Not. R. Astron. Soc., 462, 3823-3829 (2016/November-2)

2S 1553-542: a Be/X-ray binary pulsar on the far side of the Galaxy.

LUTOVINOV A.A., BUCKLEY D.A.H., TOWNSEND L.J., TSYGANKOV S.S. and KENNEA J.

Abstract (from CDS):

We report the results of a comprehensive analysis of X-ray (Chandra\nand Swift observatories), optical (Southern African Large Telescope, SALT) and near-infrared (the VVV survey) observations of the Be/X-ray binary pulsar 2S 1553-542. Accurate coordinates for the X-ray source are determined and are used to identify the faint optical/infrared counterpart for the first time. Using VVV and SALTICAM photometry, we have constructed the spectral energy distribution (SED) for this star and found a moderate NIR excess that is typical for Be stars and arises due to the presence of circumstellar material (disc). A comparison of the SED with those of known Be/X-ray binaries has allowed us to estimate the spectral type of the companion star as B1-2V and the distance to the system as >15 kpc. This distance estimation is supported by the X-ray data and makes 2S 1553-542 one of the most distant X-ray binaries within the Milky Way, residing on the far side in the Scutum-Centaurus arm or even further.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: individual: 2S 1553-542 - X-rays: binaries - X-rays: binaries

Simbad objects: 8

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