GRB 180624A: Swift-BAT refined analysis
Abstract
Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 180624A (trigger #844192) (Gibson et al., GCN Circ. 22832). The BAT ground-calculated position is RA, Dec = 318.096, -2.356 deg which is RA(J2000) = 21h 12m 22.9s Dec(J2000) = -02d 21' 21.0" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 47%. The mask-weighted light curve shows a multi-peaked light curve that starts at ~T-60 s and ends at ~T+540 s. The largest peak occurs at ~T+7 s. The burst went out of the BAT FOV at ~T+720 s. T90 (15-350 keV) is 486.4 +- 38.5 sec (estimated error including systematics). The time-averaged spectrum from T-60.61 to T+541.80 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.91 +- 0.10. The fluence in the 15-150 keV band is 5.8 +- 0.3 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+6.02 sec in the 15-150 keV band is 1.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/844192/BA/
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2018
- Bibcode:
- 2018GCN.22848....1C