2001A&A...376L..17S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.11CET22:27:30

2001A&A...376L..17S - Astronomy and Astrophysics, volume 376, L17-21 (2001/9-3)

VLT optical observations of V821 Ara(= GX 339-4) in an extended ``off'' state.

SHAHBAZ T., FENDER R. and CHARLES P.A.

Abstract (from CDS):

We report on low-resolution spectroscopy of GX 339-4 during its current, extended X-ray ``off'' state in May 2000 (r=20.1) obtained with the VLT Focal Reducer/low dispersion Spectrograph (FORS1). Although we do not positively detect the secondary star in GX 339-4 we place an upper limit of 30 percent on the contribution of a ``normal'' K-type secondary star spectrum to the observed flux. Using this limit for the observed magnitude of the secondary star, we find a lower limit for the distance of GX 339-4 to be 5.6 kpc.

Abstract Copyright:

Journal keyword(s): stars: individual: GX 339-4 - stars: X-rays - stars: accretion, accretion disks - black hole physics

Simbad objects: 6

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Number of rows : 6

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 HD 120033 ** 13 47 13.3930297208 -09 42 33.990278134   7.472 6.049     K3III 33 0
2 HD 122430 * 14 02 22.7817289987 -27 25 47.199212657   6.799 5.469     K2/3III 37 1
3 HD 149632 SB* 16 35 26.2878957260 +17 03 26.429806648   6.456 6.403     A2V 49 0
4 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1704 0
5 HD 155111 * 17 10 37.6447062983 -27 00 18.934716232   10.64 8.52     K5(III) 5 0
6 HD 157423 * 17 25 33.4240915797 -48 07 20.155674275   10.52 9.30     K1III 3 0

    Equat.    Gal    SGal    Ecl

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2019.11.11-22:27:30

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