GRBweb by P. Coppin

This page lists all entries on GRB201221B in GRBweb

Summary Fermi GBM GCN 29101 GCN 29147

Summary table
Variable	Value	Source
GRB_name_Fermi	GRB201221591
T0	14:11:42.998 UTC	Fermi_GBM
ra	110.6100°	Fermi_GBM
decl	32.0400°	Fermi_GBM
pos_error	4.76e+00°	Fermi_GBM
T90	0.032 s	Fermi_GBM
T90_error	0.369 s	Fermi_GBM
T90_start	14:11:42.998 UTC	Fermi_GBM
fluence	2.28e-07 erg/cm²	Fermi_GBM
fluence_error	1.24e-08 erg/cm²	Fermi_GBM
T100	0.032 s
GBM_located	True
mjd	59204.59146988426	Fermi_GBM

Fermi GBM table
GRB_name_Fermi	GRB201221591
trigger_name	bn201221591
ra	110.6100°
decl	32.0400°
pos_error	4.76e+00°
datum	2020-12-21
t_trigger	14:11:43.014 UTC
T90	0.032 s
T90_error	0.369 s
T90_start	14:11:42.998 UTC
fluence	2.28e-07 erg/cm²
fluence_error	1.24e-08 erg/cm²
flux_1024	2.25e+00 erg/cm²/s
flux_1024_error	2.25e-01 erg/cm²/s
flux_1024_time	-1.28e-01 erg/cm²/s
flux_64	1.58e+01 erg/cm²/s
flux_64_error	1.40e+00 erg/cm²/s

GCN 29101 table
GRB_name	GRB201221B
GCN_number	29101
Detection_method	Fermi GBM final loc
t_trigger	14:11:43 UTC
ra	110.6000°
decl	32.0000°
Circular_text	TITLE: GCN CIRCULAR NUMBER: 29101 SUBJECT: GRB 201221B: Fermi GBM Final Real-time Localization DATE: 20/12/21 14:23:08 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 14:11:43 UT on 21 Dec 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 201221B (trigger 630252708.014426 / 201221591). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 110.6, Dec = 32.0 (J2000 degrees, equivalent to J2000 07h 22m, 32d 00'), with a statistical uncertainty of 4.1 degrees. The angle from the Fermi LAT boresight is 14.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201221591/quicklook/glg_skymap_all_bn201221591.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201221591/quicklook/glg_healpix_all_bn201221591.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201221591/quicklook/glg_lc_medres34_bn201221591.gif

GCN 29147 table
GRB_name	GRB201221B
GCN_number	29147
Detection_method	Fermi GBM Other
Circular_text	TITLE: GCN CIRCULAR NUMBER: 29147 SUBJECT: GRB 201221B: Insight-HXMT/HE detection DATE: 20/12/23 11:32:53 GMT FROM: Ce Cai at IHEP C. Cai, S. Xiao, Y. F. Du, Y. G. Zheng, Q. Luo, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team: At 2020-12-21T14:11:43.00 (T0), Insight-HXMT/HE detected GRB 201221B (trigger ID: HEB201221591) in a routine search of the data, which also triggered Fermi/GBM (GCN #29101). The Insight-HXMT/HE light curve mainly consists of a single pulse with a duration (T90) of 0.03 s measured from T0-0.00 s. The 1-ms peak rate, measured from T0-0.005 s, is 9739 cnts/sec. The total counts from this burst is 193 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB201221591_lc.jpg All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope. Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.