Coordinates

RA: 19^h45^m39^s.354
DEC: +27^∘21'55''.437
Position-uncertainty [arcsec]: 2.804 × 10^-5
Galactic-longitude [deg]: 63.21
Galactic-latitude [deg]: 1.4
Coordinate-Reference

Binary System

Alternative Name: GRO J1944+26
X-ray Type: BE,CL,XP,XT
Mean Distance [kpc]: 11.6
Distance Range [kpc]: 7.34 - 16.52

Compact Object

Orbital Period [d]: 169.2^[1][2]
Pulse Period [s]: 15.8^[1][2][3][4]
CRSF energy [keV]: 36^[1][2]
Chandra flux [10^-12 erg cm^-2 s^-1]:0.59 (0.5-7.0 keV)
Swift/XRT flux [10^-12 erg cm^-2 s^-1]:1303.0 (0.3-10.0 keV)
Swift/BAT flux [10^-12 erg cm^-2 s^-1]:53.84 (14-195 keV)
INTEGRAL flux [10^-12 erg cm^-2 s^-1]:53.77 (17-60 keV)

Optical Counterpart

Gaia DR3 Name: 2028089540103670144
Counterpart: confirmed
Spectral Type: B01-IVVe^[1]
G [mag]: 15.6886(0.0030)
V [mag]: 16.92
J [mag]: 12.54(0.04)
H [mag]: 11.831(0.035)
K [mag]: 11.333(0.024)
W1 [mag]: 10.768(0.014)
W2 [mag]: 10.382(0.010)
Effective stellar temperature [K]: 5280.8