The Neil Gehrels Swift Observatory

General Information:

Swift Name:SWIFT J1240.2+3457A
RA:189.9984 (J2000)
Dec:34.9582 (J2000)
S/N:5.77
Counterpart Name:Mrk 653
Ctpt RA:189.9653 (J2000)
Ctpt Dec:34.9749 (J2000)
Flux:8.30 (6.01, 10.88) × 10-12 ergs s-1 cm-2, (14-195 keV)
Gamma:2.06 (1.67, 2.51)
Chi2r:0.76
Redshift:0.0431
Luminosity:43.57 log[ergs s-1] (14-195 keV)
AS:1
Class:5
Type:Sy2

BAT 157-Month Lightcurve:

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1240.2+3457A

Crab Weighted Monthly Mosaic Lightcurve for SWIFT J1240.2+3457A

Lightcurve:

BAT 157-Month Spectrum:

BAT Spectrum for SWIFT J1240.2+3457A

BAT Spectrum for SWIFT J1240.2+3457A

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