GRB 210822A: GECAM detection
Abstract
During the commissioning phase, GECAM-B was triggered in-flight by a long bright burst, GRB 210822A, at 2021-08-22T09:18:18.00 UTC (denoted as T0), which is also observed by Swift/BAT (GCN #30677). Its alert data was downlinked to the ground through the short message service of BeiDou Navigation Satellite System (BDS). According to the GECAM-B light curves in about 30-1000 keV from BDS alert data, this burst mainly consists of multiple pulses with a duration of about 15 s. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/gecamb_lc_grd_all_combine_83323099.png An automatic localization was calculated using the light curves and spectrum, and the GECAM location is consistent with the Swift/BAT position 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:
- August 2021
- Bibcode:
- 2021GCN.30678....1W