The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J1257.4-6915
RA:194.4313 (J2000)
Dec:-69.2909 (J2000)
S/N:62.60
Counterpart Name:4U 1254-690
Ctpt RA:194.4048 (J2000)
Ctpt Dec:-69.2886 (J2000)
Flux:62.37 (61.17, 63.57) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:5.26 (5.16, 5.37)
Chi2r:5.76
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 J1257.4-6915

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1257.4-6915

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1257.4-6915

BAT Spectrum for SWIFT J1257.4-6915

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