GRB 220104A:GECAM detection
Abstract
During the commissioning phase, GECAM-B was triggered in-flight by a long bright burst, GRB 220104A, at 2022-01-04T04:01:02.850 UTC (denoted as T0), which was also observed by Fermi/GBM (GCN #31380). According to the BDS alert data, this burst mainly consists of a broad pulse with a duration of about 2 s. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/gecamb_lc_grd_all_combine_94968062.png GECAM-B localized this burst to the following position (J2000): ra: 192.9 deg dec: 37.3 deg err: 10.1 deg (1-sigma, statistical only) The current systematic error of location is estimated to be several degrees which could be minimized by the ongoing calibration. The GECAM preliminary location could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/gecamb_sky_fit_94968062.png This position is consistent with the Fermi GBM team localization (trigger #662961667) within the error. Please note that all GECAM results here are preliminary. The final analysis will be published in journal papers or GECAM online catalog. Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) mission consists of two small satellites (GECAM-A and GECAM-B) in Low Earth Orbit (600 km, 29 deg), launched on Dec 10, 2020 (Beijing Time), which was funded by the Chinese Academy of Sciences (CAS).
- Publication:
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GRB Coordinates Network
- Pub Date:
- January 2022
- Bibcode:
- 2022GCN.31382....1G