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

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ID# 71

Swift J1727.8-1613

(Miller-Jones2023)

RA     (ICRS)     DEC [hh:mm:ss.ss]          [dd:mm:ss.ss] 17:27:43.31  -16:12:19.23

ℓ                      b [deg]                            [deg] 008.6416052  10.25479693

Year of discovery: 2023  
(Page2023Negoro2023)

# of outbursts after discovery:

Basic data

Distance [kpc]	3.4±0.3	MataSanchez2024a
Distance to the plane (z) [kpc]	0.61±0.06	MataSanchez2024a
Orbital period (Porb) [h]	10.804±0.001	MataSanchez2024a
Peak X-ray flux [erg s-1 cm-2] [keV]	1.65E-07 [2-10]	Draghis2023
Outburst magnitude (AB)	i'=12.57±0.01	Alabarta2023
Quiescent magnitude (AB)	i=19.41±0.2	MataSanchez2024
E(B-V) [mag]	0.47	MataSanchez2024

Dynamically confirmed BH

NOTES

Dynamical parameters

Orbital period [h]	10.804±0.001	MataSanchez2024a
Star's spectral type	K4V	MataSanchez2024a
Star's radial velocity amplitude (K2) [km/s]	390±4	MataSanchez2024a
Mass function 'f(M1)' [M☉]	2.77±0.09	MataSanchez2024a
BH mass (M1) [M☉]	>3.1±0.1	MataSanchez2024a
Mass ratio (q=M2/M1)
Inclination angle (i) [deg]	<74	MataSanchez2024a

Optical/NIR magnitudes

Mag. Outburst (AB) Alabarta2023
		r’=12.60±0.01	i'=12.57±0.01
Y=12.59±0.01
Mag. Quiescent (AB) MataSanchez2024
		g’=20.82±0.05
r=19.95±0.0		i=19.41±0.2	z=19.06±0.02

Aladin finding chart

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Swift J1727.8-1613 in Simbad

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Pan-STARRS1 finding chart

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