GCN Circular 34992

Yue Wang, Shao-Lin Xiong, Yue Huang report on behalf of the GECAM team:

GECAM-B was triggered in-flight by a long burst, GRB 231110A, at 2023-11-10T21:19:35.100 UTC (T0), which was also observed by Swift/BAT (GCN #34977).

According to the realtime alert data of GECAM-B, this burst
mainly consists of a long pulse with a duration (T90) of about ~20 sec (20-1000 keV).

The GECAM-B localization is consistent with the Swift/BAT localization (trigger=1195733) within the error.

The time-averaged spectrum of GECAM-B realtime data from about T0 to T0+4 s could be
adequately fit by a cut-off power-law with a flux about 1.3E-6 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).