BlackCAT A Catalog of Stellar-Mass Black Holes in X-ray Binaries

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ID# 24

GRS 1739-278

V2606 Oph

( Hjellming1996 )

RA     [J2000]     DEC

[]          []

17:42:40.03  -27:44:52.70

ℓ                      b

[deg]                            [deg]

000.6720951  +01.17572417

Year of discovery: 1996  
( Paul1996 )

# of outbursts after discovery: 1

Basic data

Distance [kpc] 7.25±1.25 Greiner1996
Distance to the plane (z) [kpc] 0.15±0.03 Greiner1996
Orbital period (Porb) [h]
Peak X-ray flux [erg s-1 cm-2]
Outburst magnitude (AB) J=17.2±0.1 Marti1997
Quiescent magnitude (AB) J>20.1 Chaty2002a
E(B-V) [mag] 2 – 4 Marti1997
Spectral type >F5V Chaty2002a


GRS 1739-278 showed another outburst in 2014 ( Miller2015b , Krimm2014b ) and 2016 ( Mereminskiy2016 ). The peak X-ray flux is taken from the MAXI SSC light curve of that outburst. It has an uncertain distance.

Optical/NIR magnitudes

Mag. Outburst (AB)
V=23.2±0.3 R=20.6±0.1
Mag. Quiescent (AB)
J>20.1 K (not AB)>18.4
Aladin finding chart
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GRS 1739-278 in Simbad

Pan-STARRS1 finding chart

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PS1 Finding chart PS1 Finding chart

This research has made use of NASA's Astrophysics Data System (ADS) and the SIMBAD database operated at CDS (Strasbourg, France)
Please acknowledge the use of this catalogue in any published work you derive from it.

Last modified: 27 August 2021.