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TITLE:   GCN CIRCULAR
NUMBER:  31052
SUBJECT: GRB 211107A: Fermi GBM Final Real-time Localization
DATE:    21/11/07 20:31:01 GMT
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

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TITLE:   GCN CIRCULAR
NUMBER:  31071
SUBJECT: GRB 211107A: GECAM detection
DATE:    21/11/10 07:26:02 GMT
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).