About: VLT optical observations of V821 Ara(=GX339-4) in an extended "off" state

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Attributs	Valeurs
type	work Article
Is Part Of	http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/w
Subject	stars: individual: GX339-4 X-rays: stars Letters black hole physics accretion, accretion disks
Title	VLT optical observations of V821 Ara(=GX339-4) in an extended "off" state
Date	2001-01-01(xsd:dateTime)
has manifestation of work	http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/m/web http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/m/print
related by	http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/authorship/3 http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/authorship/2 http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/authorship/1
Author	Charles, P. A. Fender, R. Shahbaz, T.
Abstract	We report on low-resolution spectroscopy of GX339-4 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 GX339-4 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 GX339-4 to be 5.6 kpc.
article type	research-article
publisher identifier	aadd061
Date Copyrighted	2001-01-01(xsd:dateTime)
Rights	© ESO, 2001
Rights Holder	ESO
is part of this journal	Astronomy & Astrophysics
is primary topic of	http://hub.abes.fr/edp/periodical/aa/2001/volume_376/issue_2/aadd061/w/record

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