TITLE:   GCN CIRCULAR
NUMBER:  35231
SUBJECT: GRB 231129C: GECAM-B detection of a bright burst
DATE:    23/11/30 10:03:59 GMT
FROM:    yqzhang_cl@163.com

GRB 231129C: GECAM-B detection of a bright burst

Chao Zheng, Shaolin Xiong, report on behalf of the GECAM team:

GECAM-B was triggered in-flight by a likely long burst, GRB 231129C,
at 2023-11-29T19:10:18.200 UTC, which was also observed by 
Fermi/GBM (Fermi/GBM team, GCN 35217 & 35227) and MAXI/GSC 
(Y. Kawakubo et al., GCN 35223) and CALET (Y. Shimizu et al., GCN 35228)
and AstroSat (G. Waratkar et al., GCN 35230).

According to the realtime alert data of GECAM-B, this burst mainly consists 
of a bright pulse with a total duration (T90) of about ~15 sec (20-1000 keV).

The GECAM light curve could be found here: 
http://twiki.ihep.ac.cn/pub/HXMT/GRBList/GRB231129C_LC.png

GECAM location is consistent with that of MAXI/GSC within the error.
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).