The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J1157.8+5529
RA:179.4465 (J2000)
Dec:55.4406 (J2000)
S/N:10.94
Counterpart Name:NGC 3998
Ctpt RA:179.4839 (J2000)
Ctpt Dec:55.4536 (J2000)
Flux:14.32 (11.84, 16.98) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:1.88 (1.64, 2.15)
Chi2r:0.35
Redshift:0.0035
Luminosity:41.60 log[ergs s-1] (14-195 keV)
AS:1
Class:5
Type:Sy1.9

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1157.8+5529

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1157.8+5529

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1157.8+5529

BAT Spectrum for SWIFT J1157.8+5529

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