Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
Abstract
MAXI/GSC observed the position of GRB 111215A (swift trigger=509717, Oates et al. GCN #12681) at 13:12 and 14:44 on December 5, 2011 (UT), 52 min before and 40 min after the trigger time.
The source was marginally detected as follows:
Time 2-4 keV 4-10 keV 13:12 4 +- 7 mCrab 52 +- 19 mCrab 14:44 16 +- 10 mCrab 41 +- 19 mCrab (uncertainties are 1-sigma statistical errors)
If this detections are true it implies that the emission of GRB 111215A lasted for more than 1.5 hours.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- December 2011
- Bibcode:
- 2011ATel.3810....1K
- Keywords:
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- X-ray;
- Gamma-Ray Burst;
- Transient