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

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ID# 2

4U 1630-472

Nor X-1

( Buxton1998 )

RA     [J2000]     DEC [hh:mm:ss.ss]          [dd:mm:ss.ss] 16:34:01.61  -47:23:34.80

ℓ                      b [deg]                            [deg] 336.9112429  +00.25029536

Year of discovery: 1969  
( Giacconi1972 Priedhorsky1986 )

# of outbursts after discovery: >20

Basic data

Distance [kpc]	4.7-11.5	Kalemci2008
Distance to the plane (z) [kpc]	0.02 – 0.05	Kalemci2008
Orbital period (Porb) [h]
Peak X-ray flux [erg s-1 cm-2] [keV]	2.65E-08 [2-10]	XTE/ASM
Outburst magnitude (AB)	K (not AB)=16.1	Augusteijn2001
Quiescent magnitude (AB)
E(B-V) [mag]	4.2	Callanan2000
Spectral type

NOTES

4U 1630-472: The peak X-ray flux was obtained from the 2003 outburst ( Tomsick2005 ) , the brightest one detected so far. It has shown quasi-periodic outburst with recurrence times of ∼600-700 d and durations of 100-200 d ( Kuulkers1997 ). The K-band magnitude was not transformed into AB system.

Optical/NIR magnitudes

Mag. Outburst (AB) Augusteijn2001
			K (not AB)=16.1
Mag. Quiescent (AB)

Aladin finding chart

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4U 1630-472 in Simbad

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