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

ID# 4

4U 1755-338

V4134 Sgr

RA (h:m:s)  DEC (º:':")  J2000:
17:58:40.04 -33:48:26.80
( Bradt1983 )

Galactic l (º)  b (º)  J2000:
357.2155210  -04.8723618

Year of discovery: 1971  
( Giacconi1972 )

# of outbursts after discovery:

Basic data

Distance (d) 6.5±2.5 (kpc) Angelini2003
d above plane (z) -0.6±0.2 (kpc) Angelini2003
Orbital period ∼4.4 (h) White1984
Peak X-ray flux 1.17E-09
(erg/s/cm2) [keV] Giacconi1974
Outburst magnitude (AB) V∼18.5 (mag) Mason1985
Quiescent magnitude (AB) R>21.555 (mag) Wachter1998
E(B-V) 0.624 (mag) Schlafly2011
Spectral type
Notes 4U 1755-338 is a quasi persistent system. This system stayed in outburst for 25yr until 1996 ( Roberts1996 , Angelini2003 ). The distance is uncertain.

Optical/NIR magnitudes

Mag. Outburst (AB) Mason1985
Mag. Quiescence (AB) Wachter1998
>21.555 >21.309 >21.956
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4U 1755-338 in Simbad
Finding charts orientation:North up, East left
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Object marked with lines

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.