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

« Previous BHT   Next BHT »

ID# 18

GRS 1915+105

V1487 Aql

(Dhawan2000)

RA     (ICRS)     DEC [hh:mm:ss.ss]          [dd:mm:ss.ss] 19:15:11.55  +10:56:44.80

ℓ                      b [deg]                            [deg] 045.3657052  -00.21897507

Year of discovery: 1992  
(Castro-Tirado1992)

# of outbursts after discovery:

Basic data

Distance [kpc]	9.4±0.8	Reid2023
Distance to the plane (z) [kpc]	-0.034±0.01	Reid2023
Orbital period (Porb) [h]	812±4	Steeghs2013
Peak X-ray flux [erg s-1 cm-2] [keV]	9.29E-08 [2-10]	XTE/ASM
Outburst magnitude (AB)	H=13.09	Shahbaz2008
Quiescent magnitude (AB)	I∼23.7±0.4	Boeer1996
E(B-V) [mag]	6.45	Fender1999

Dynamically confirmed BH

NOTES

GRS J1915+105 has remained in outburst since its discovery in 1992 (Castro-Tirado1992). It is included here because it was detected as a transient source. The peak X-ray flux was obtained from the maximum value in the XTE/ASM light curves (MJD=50317.68034). The K-band magnitude was not transformed into AB system.

Dynamical parameters

Orbital period [h]	812±4	Steeghs2013
Star's spectral type	K1 – 5III	Harlaftis2004
Star's radial velocity amplitude (K2) [km/s]	126±1	Steeghs2013
Mass function 'f(M1)' [M☉]	7±0.2	Steeghs2013
BH mass (M1) [M☉]	12 11.2±2	Reid2023 Steeghs2013Reid2014
Mass ratio (q=M2/M1)	0.042±0.024	Steeghs2013
Inclination angle (i) [deg]	60±5	Reid2023
Rot. broadening (v sini) [km/s]	21±4	Steeghs2013

Optical/NIR magnitudes

Mag. Outburst (AB) Shahbaz2008
		H=13.09	K (not AB)=11.4
Mag. Quiescent (AB) Boeer1996
	I∼23.7±0.4

Aladin finding chart

Scroll to zoom. Set survey image in "Manage layers"
Default image: DSS2 Red

GRS 1915+105 in Simbad

---

Pan-STARRS1 finding chart

Click to enlarge in new tab/window