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GCN Circular 34993

GRB 231111A: GECAM-C detection of a long burst (correction)
2023-11-12T02:28:22Z (3 months ago)
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Wen-Long Zhang, Shao-Lin Xiong, Yue Huang report on behalf of the GECAM team:

GECAM-C was triggered by a long burst, GRB 231111A, at 2023-11-11T14:17:19.850 UTC (T0), which was also observed by Swift/BAT (GCN #34981) . 

According to the realtime alert data, the GECAM-C light curve shows roughly two peaks with a total duration of ~30 sec (20-1000 keV). 

The time-averaged spectrum of GECAM-C realtime data from about T0 to T0+20 s could be adequately fit by a cut-off power-law with a flux about 3.3E-7 erg/cm^2/s in 20-1000 keV. 

We note that these results are based on realtime alert data and thus very preliminary. Refined analysis will be reported later.

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).
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