2003A&A...397..739N


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET08:48:26

2003A&A...397..739N - Astronomy and Astrophysics, volume 397, 739-745 (2003/1-2)

The Be/X-ray transient KS 1947+300.

NEGUERUELA I., ISRAEL G.L., MARCO A., NORTON A.J. and SPEZIALI R.

Abstract (from CDS):

We present optical spectroscopy and optical and infrared photometry of the counterpart to the transient X-ray source KS 1947+300. The counterpart is shown to be a moderately reddened V=14.2 early-type Be star located in an area of low interstellar absorption slightly above the Galactic plane. Changes in brightness are accompanied by correlated reddening of the source, as is expected in this kind of object. From intermediate resolution spectroscopy, we derive a spectral type B0Ve. If the intrinsic luminosity of the star is normal for its spectral type, KS 1947+300 is situated at a distance of ∼10 kpc, implying that its X-ray luminosity at the peak of the spring 2000 X-ray outburst was typical of Type II outbursts in Be/X-ray transients. KS 1947+300 is thus the first Be/X-ray recurrent transient showing Type II outbursts which has an almost circular orbit.

Abstract Copyright:

Journal keyword(s): stars: emission line, Be - stars: individual: KS 1947+300 - stars: binaries: close - stars: neutron - X-ray: stars

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V635 Cas HXB 01 18 31.9704429246 +63 44 33.071137750 17.05 16.64 15.19 14.34 13.22 B0.2Ve 669 0
2 HD 245770 HXB 05 38 54.5749436467 +26 18 56.839215267 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 879 0
3 [KRL2007b] 171 HXB 15 44 02 -56 42.7           Be? 51 0
4 2S 1553-542 HXB 15 57 49.00 -54 24 54.0           Be 98 0
5 XTE J1946+274 HXB 19 45 39.3569004855 +27 21 55.502556930   18.76 16.92 15.62 14.38 B0-1IV-Ve 104 0
6 2MASS J19493548+3012317 HXB 19 49 35.4840244577 +30 12 31.775034731   15.16 14.22 13.53 12.88 B0Ve 138 1
7 GRO J2014+34 XB* 19 54 +30.1           ~ 32 1

    Equat.    Gal    SGal    Ecl

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2020.10.25-08:48:26

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