The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J2139.4+5703
RA:324.8572 (J2000)
Dec:57.0421 (J2000)
S/N:4.97
Counterpart Name:Ginga 2138+56
Ctpt RA:324.8779 (J2000)
Ctpt Dec:56.9862 (J2000)
Flux:5.48 (3.88, 7.36) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:3.09 (2.52, 3.87)
Chi2r:2.85
Redshift:NA
Luminosity:NA log[ergs s-1] (14-195 keV)
AS:1
Class:13
Type:HMXB

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J2139.4+5703

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J2139.4+5703

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J2139.4+5703

BAT Spectrum for SWIFT J2139.4+5703

BAT Hard X-ray Transient Source Page:

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