GRB 211107A
GCN Circular 31071
Subject
GRB 211107A: GECAM detection
Date
2021-11-10T07:26:02Z (4 years ago)
From
Y Q Zhang at IHEP <yqzhang@ihep.ac.cn>
Y. Q. Zhang, S. L. Xiong, S. Xiao, C. Cai, X. Y. Zhao, Y. Huang, X. Y. Song,
J. C. Liu, S. L. Xie, Y. Zhao, Z. W. Guo, C. Zheng, W. C. Xue, C. Y. Li,
C. W. Wang, Q. B. Yi, B. X. Zhang, P. Zhang, W. X. Peng, R. Qiao, D. Y. Guo,
X. B. Li, X. Ma, P. Wang, J. Wang, Z. Zhang, S. J. Zheng, W. Chen, J. J. He,
G. Y. Zhao, Y. Q. Du, H. Wu, J. Liang, Q. Luo, X. L. Zhang,
L. M. Song, F. J. Lu, S. N. Zhang (IHEP), report on behalf of GECAM team:
During the commissioning phase, GECAM-B was triggered on-ground by a weak burst,
GRB 211107A, at 2021-11-07T20:20:40.220 UTC (denoted as T0),
which was also observed by Fermi/GBM (GCN #31052).
According to the GECAM-B light curves in about 20-500 keV,
this burst mainly consists of multiple pulses with a duration of 5 s.
The GECAM light curve could be found here:
http://twiki.ihep.ac.cn/pub/GECAM/GRBList/gecamb_lc_grd_90015640_v01.PNG
GECAM location is consistent with the Fermi/GBM 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).
GCN Circular 31052
Subject
GRB 211107A: Fermi GBM Final Real-time Localization
Date
2021-11-07T20:31:01Z (4 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 20:20:40 UT on 7 Nov 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211107A (trigger 658009245.216482 / 211107848).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 183.4, Dec = -61.2 (J2000 degrees, equivalent to J2000 12h 13m, -61d 12'), with a statistical uncertainty of 17.9 degrees.
The angle from the Fermi LAT boresight is 87.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211107848/quicklook/glg_skymap_all_bn211107848.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211107848/quicklook/glg_healpix_all_bn211107848.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211107848/quicklook/glg_lc_medres34_bn211107848.gif