Coordinates

RA: 11^h21^m15^s.085
DEC: -60^∘37'25''.593
Position-uncertainty [arcsec]: 1.612 × 10^-5
Galactic-longitude [deg]: 292.09
Galactic-latitude [deg]: 0.34
Coordinate-Reference

Binary System

Alternative Name: Krzeminski
X-ray Type: CL,EB,QPO,SG,XP
Mean Distance [kpc]: 6.07
Distance Range [kpc]: 4.51 - 7.43
Hydrogen Column density [10²¹ cm⁻²]: 17.0

Compact Object

Mean Mass[M_☉]: 1.57^[1]
Mass Range [M_☉]: 1.41 - 1.73^[1]
Orbital Period [d]: 2.09^[1][2][3]
Pulse Period [s]: 4.8^[1][2][3]
CRSF energy [keV]: 28^[1][2]
XMM-Newton flux [10^-12 erg cm^-2 s^-1]:224.06 (0.2-12.0 keV)
Chandra flux [10^-12 erg cm^-2 s^-1]:0.0 (~0.1-10.0 keV)
Swift/XRT flux [10^-12 erg cm^-2 s^-1]:3861.0 (0.3-10.0 keV)
Swift/BAT flux [10^-12 erg cm^-2 s^-1]:1044.71 (14-195 keV)

Optical Counterpart

Gaia DR3 Name: 5337498593446516480
Counterpart: confirmed
Spectral Type: O6.5 II-III^[1]
G [mag]: 12.8789(0.0033)
V [mag]: 12.27(0.08)
J [mag]: 10.736(0.024)
H [mag]: 10.311(0.023)
K [mag]: 10.093(0.021)
W1 [mag]: 9.572(0.008)
W2 [mag]: 9.796(0.008)
Effective stellar temperature [K]: 13653.09