The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J1256.4+5654
RA:194.1102 (J2000)
Dec:56.8922 (J2000)
S/N:5.07
Counterpart Name:Mrk 231
Ctpt RA:194.0593 (J2000)
Ctpt Dec:56.8737 (J2000)
Flux:7.77 (5.18, 10.70) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:1.63 (1.14, 2.16)
Chi2r:0.33
Redshift:0.4147
Luminosity:45.69 log[ergs s-1] (14-195 keV)
AS:4
Class:4
Type:Sy1

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1256.4+5654

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1256.4+5654

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1256.4+5654

BAT Spectrum for SWIFT J1256.4+5654

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