The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J1739.2-4428
RA:264.7431 (J2000)
Dec:-44.4509 (J2000)
S/N:382.49
Counterpart Name:4U 1735-44
Ctpt RA:264.7429 (J2000)
Ctpt Dec:-44.4500 (J2000)
Flux:491.48 (490.06, 492.90) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:5.22 (5.20, 5.23)
Chi2r:318.64
Redshift:NA
Luminosity:NA log[ergs s-1] (14-195 keV)
AS:1
Class:14
Type:LMXB

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1739.2-4428

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1739.2-4428

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1739.2-4428

BAT Spectrum for SWIFT J1739.2-4428

BAT Hard X-ray Transient Source Page:

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