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

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ID# 7

3A 0620-003

N Mon 1975 = V616 Mon

( Gallo2006 )

RA     [J2000]     DEC

[]          []

06:22:44.50  -00:20:44.72

ℓ                      b

[deg]                            [deg]

209.9563081  -06.53987555

Year of discovery: 1975  
( Elvis1975 )

# of outbursts after discovery: 1

Basic data

Distance [kpc] 1.06±0.1 Cantrell2010
Distance to the plane (z) [kpc] -0.11±0.01 Cantrell2010
Orbital period (Porb) [h] 7.752340±2E-06 GonzalezHernandez2014
Peak X-ray flux [erg s-1 cm-2]
Outburst magnitude (AB) V∼11.1 Robertson1976
Quiescent magnitude (AB) V=18.23±0.04 Cantrell2010 Gelino2001 Froning2001
E(B-V) [mag] 0.35 Hynes2005

Dynamically confirmed BH


3A 0620-003 showed an outburst in 1917 detected in plate scales prior to its detection in X-rays in 1975 ( Eachus1976 ).
A period derivative of -0.60±0.08 ms/yr has been measured ( GonzalezHernandez2014 ).
Gandhi2019 obtained a distance of 1.72+1.02-0.47 kpc from Gaia DR2.

Dynamical parameters

Orbital period [h] 7.752340±2E-06 GonzalezHernandez2014
Star's spectral type K2 – 7V Orosz1994
Star's radial velocity amplitude (K2) [km/s] 437±2 GonzalezHernandez2010
Mass function 'f(M1)' [M] 2.79±0.04 GonzalezHernandez2010
BH mass (M1) [M] 6.6±0.3 Cantrell2010
Mass ratio (q=M2/M1) 0.074±0.006 Orosz1994
Inclination angle (i) [deg] 51±0.9 Cantrell2010
Rot. broadening (v sini) [km/s]

Optical/NIR magnitudes

Mag. Outburst (AB)
B∼11.3 V∼11.1
Mag. Quiescent (AB)
Cantrell2010 Gelino2001 Froning2001
B=19.32±0.04 V=18.23±0.04 R=17.12±0.04
J=16.5±0.1 H=16.23±0.02
Aladin finding chart
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Default image: DSS2 Red
3A 0620-003 in Simbad

Pan-STARRS1 finding chart

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PS1 Finding chart PS1 Finding chart

Finding charts

Orientation: North up, East left. Object marked
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Finding chart
Finding chart
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.