Swift BAT 157-Month Hard X-ray Survey » SWIFT J1731.6-1657

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General Information:

Swift Name:	SWIFT J1731.6-1657
RA:	262.9350 (J2000)
Dec:	-16.9627 (J2000)
S/N:	277.19
Counterpart Name:	GX 9+9
Ctpt RA:	262.9342 (J2000)
Ctpt Dec:	-16.9617 (J2000)
Flux:	349.51 (348.10, 350.92) × 10^-12 ergs s^-1 cm^-2, (14-195 keV)
Gamma:	5.99 (5.96, 6.01)
Chi²_{r_:}	77.77
Redshift:	NA
Luminosity:	NA log[ergs s^-1] (14-195 keV)
AS:	1
Class:	14
Type:	LMXB

SIMBAD
NED

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1731.6-1657

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1731.6-1657

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1731.6-1657

BAT Spectrum for SWIFT J1731.6-1657

SWIFT_J1731.6-1657.pha

BAT Hard X-ray Transient Source Page:

http://swift.gsfc.nasa.gov/docs/swift/results/transients/weak/GX9p9/

Data last modified: 15 Sep 2025
Page last modified: 03 Jun 2025