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

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ID# 70

MAXI J1803-298

(Gropp2021)

RA     (ICRS)     DEC [hh:mm:ss.ss]          [dd:mm:ss.ss] 18:03:02.79  -29:49:49.70

ℓ                      b [deg]                            [deg] 001.1471843  -03.727514

Year of discovery: 2021  
(Serino2021)

# of outbursts after discovery:

Basic data

Distance [kpc]
Distance to the plane (z) [kpc]
Orbital period (Porb) [h]	7.0±0.2	Jana2022
Peak X-ray flux [erg s-1 cm-2] [keV]	3.96E-09 [2-10]	Bult2021
Outburst magnitude (AB)	i'=16.01±0.01	Saikia2021Hosokawa2021
Quiescent magnitude (AB)
E(B-V) [mag]	0.46	Schlafly2011

It is not a dynamical BH but there was at least a suggestion that it might contain a BH based on optical properties

NOTES

Dynamical parameters

Orbital period [h]	7.0±0.2	Jana2022
Star's spectral type
Star's radial velocity amplitude (K2) [km/s]	460 - 570	MataSanchez2022
Mass function 'f(M1)' [M☉]	2.1-7.2	Jana2022
BH mass (M1) [M☉]	3 - 10 3.5 - 12.5	MataSanchez2022 Jana2022
Mass ratio (q=M2/M1)	0.01 - 0.2	MataSanchez2022
Inclination angle (i) [deg]	>65	MataSanchez2022

Optical/NIR magnitudes

Mag. Outburst (AB) Saikia2021Hosokawa2021
	g’∼16.2	Rc=15.9±0.4	i'=16.01±0.01
Mag. Quiescent (AB)

Additional information

Light Curve by XB-NEWS (Russell2019)

Aladin finding chart

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MAXI J1803-298 in Simbad

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Pan-STARRS1 finding chart

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