GCN Circular 35158
GRB 231122A: GECAM detection
2023-11-22T16:40:17Z (3 months ago)
Chenwei Wang at IHEP <email@example.com>
Chen-Wei Wang, Shao-Lin Xiong report on behalf of the GECAM team:
GECAM-C was triggered in-flight by a long burst, GRB 231122A
at 2023-11-22T12:44:26.350 UTC (denoted as T0),
which was also detected by Fermi/GBM (GCN #35156).
According to the realtime alert data of GECAM-C, this burst mainly consists of many pulses
with a duration of about 50 s. The time-averaged spectrum from T0 to T0+4 s
could be adequately fit by a power law with high energy exponential cutoff function
with a fluence of about 6.8E-6 erg/cm2 in 20-1000 keV.
Using the automatic on-ground localization pipeline with the realtime alert data,
GECAM-C localized this burst to the following position (J2000):
Ra: 106.1 deg
Dec: -7.8 deg
Err: 14.2 deg (1-sigma, statistical only)
GECAM location is consistent with that of Fermi/GBM within the error.
We note that this analysis is based on realtime alert data and thus very preliminary.
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor
(GECAM) mission originally consists of two micro-satellites (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).