//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 31244 SUBJECT: GRB 211216B: Fermi GBM Final Real-time Localization DATE: 21/12/16 13:31:20 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 13:21:07 UT on 16 Dec 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 211216B (trigger 661353672.391664 / 211216556). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 100.8, Dec = 60.1 (J2000 degrees, equivalent to J2000 06h 43m, 60d 06'), with a statistical uncertainty of 4.3 degrees. The angle from the Fermi LAT boresight is 100.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211216556/quicklook/glg_skymap_all_bn211216556.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/bn211216556/quicklook/glg_healpix_all_bn211216556.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn211216556/quicklook/glg_lc_medres34_bn211216556.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 31246 SUBJECT: GRB 211216B: GECAM detection DATE: 21/12/16 15:15:27 GMT FROM: Wangchen Xue at IHEP W. C. Xue, S. Xiao, Y. Q. Zhang, S. L. Xiong, C. Cai, P. Zhang, C. Y. Li, S. L. Xie, X. Y. Zhao, Y. Huang, X. Y. Song, J. C. Liu, Y. Zhao, Z. W. Guo, C. Zheng, C. W. Wang, Q. B. Yi, B. X. Zhang, W. X. Peng, R. Qiao, D. Y. Guo, X. B. Li, X. Ma, L. M. Song, 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, H. M. Zhang, Z. H. An, M. Gao, K. Gong, B. Li, C. Li, J. H. Li, X. Q. Li, Y. G. Li, X. H. Liang, X. J. Liu, Y. Q. Liu, X. L. Sun, Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, X. Zhou, F. J. Lu, S. N. Zhang (IHEP) report on behalf of GECAM team: During the commissioning phase, GECAM-B was triggered in-flight by a long burst, GRB 211216B, at 2021-12-16T13:21:08.550 UTC (denoted as T0), which was also observed by Fermi/GBM (GCN #31244). GECAM alert data was downlinked to the ground through the short message service of BeiDou Navigation Satellite System (BDS) within ~60 s after T0. According to the BDS alert data, this burst mainly consists of multiple pulses with a duration of about 30 s. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/gecamb_lc_grd_all_combine_93360068.png Using the automatic on-ground localization pipeline with the BDS alert data, GECAM-B localized this burst to the following position (J2000): Ra: 101.95 deg Dec: 49.58 deg Err: 6.23 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. 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). //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 31247 SUBJECT: Fermi GRB 211216B: Global MASTER-Net observations report DATE: 21/12/16 15:30:08 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 211216B ( Fermi GBM team, GCN 31244) errorbox 5497 sec after notice time and 5506 sec after trigger time at 2021-12-16 14:52:53 UT, with upper limit up to 16.8 mag. Observations started at twilight. The observations began at zenith distance = 62 deg. The sun altitude is -13.3 deg. The galactic latitude b = 23 deg., longitude l = 156 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1816527 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 5536 | 2021-12-16 14:52:53 | MASTER-Kislovodsk | (06h 36m 03.28s , +60d 06m 50.8s) | C | 60 | 16.8 | 5536 | 2021-12-16 14:52:53 | MASTER-Kislovodsk | (06h 44m 05.60s , +59d 42m 12.6s) | C | 60 | 15.8 | 5616 | 2021-12-16 14:54:13 | MASTER-Kislovodsk | (06h 43m 24.96s , +58d 14m 40.6s) | C | 60 | 16.4 | 5616 | 2021-12-16 14:54:13 | MASTER-Kislovodsk | (06h 50m 59.87s , +57d 50m 00.9s) | C | 60 | 15.1 | 5697 | 2021-12-16 14:55:34 | MASTER-Kislovodsk | (06h 28m 09.61s , +62d 01m 05.7s) | C | 60 | 16.2 | 5697 | 2021-12-16 14:55:34 | MASTER-Kislovodsk | (06h 36m 41.23s , +61d 36m 24.5s) | C | 60 | 14.5 | 5937 | 2021-12-16 14:59:34 | MASTER-Kislovodsk | (07h 00m 11.18s , +62d 02m 28.7s) | C | 60 | 13.6 | 6018 | 2021-12-16 15:00:55 | MASTER-Kislovodsk | (07h 03m 23.70s , +63d 30m 55.4s) | C | 60 | 14.2 | 6018 | 2021-12-16 15:00:55 | MASTER-Kislovodsk | (06h 53m 59.70s , +63d 55m 34.8s) | C | 60 | 16.2 | 6258 | 2021-12-16 15:04:55 | MASTER-Kislovodsk | (06h 19m 33.73s , +63d 57m 13.0s) | C | 60 | 16.2 | 6258 | 2021-12-16 15:04:55 | MASTER-Kislovodsk | (06h 28m 46.22s , +63d 32m 46.8s) | C | 60 | 15.7 | 6338 | 2021-12-16 15:06:15 | MASTER-Kislovodsk | (06h 14m 31.88s , +58d 13m 43.4s) | C | 60 | 14.7 | 6339 | 2021-12-16 15:06:15 | MASTER-Kislovodsk | (06h 22m 09.19s , +57d 49m 29.2s) | C | 60 | 13.9 | 6418 | 2021-12-16 15:07:35 | MASTER-Kislovodsk | (06h 23m 09.19s , +56d 21m 08.8s) | C | 60 | 14.4 | 6418 | 2021-12-16 15:07:35 | MASTER-Kislovodsk | (06h 30m 20.94s , +55d 56m 54.9s) | C | 60 | 13.4 | 6908 | 2021-12-16 15:15:45 | MASTER-Kislovodsk | (06h 36m 03.28s , +60d 08m 15.1s) | C | 60 | 16.5 | 6908 | 2021-12-16 15:15:45 | MASTER-Kislovodsk | (06h 44m 02.61s , +59d 44m 09.3s) | C | 60 | 16.1 | 6988 | 2021-12-16 15:17:05 | MASTER-Kislovodsk | (06h 43m 23.49s , +58d 13m 11.9s) | C | 60 | 15.7 | 6988 | 2021-12-16 15:17:05 | MASTER-Kislovodsk | (06h 50m 55.79s , +57d 49m 07.8s) | C | 60 | 15.8 | 7068 | 2021-12-16 15:18:25 | MASTER-Kislovodsk | (06h 28m 12.51s , +62d 01m 42.0s) | C | 60 | 16.2 | 7068 | 2021-12-16 15:18:25 | MASTER-Kislovodsk | (06h 36m 41.97s , +61d 37m 32.2s) | C | 60 | 15.8 | 7229 | 2021-12-16 15:21:06 | MASTER-Kislovodsk | (07h 06m 29.06s , +60d 07m 15.7s) | C | 60 | 16.1 | 7229 | 2021-12-16 15:21:06 | MASTER-Kislovodsk | (07h 14m 27.47s , +59d 43m 00.6s) | C | 60 | 15.2 | 7309 | 2021-12-16 15:22:26 | MASTER-Kislovodsk | (07h 00m 34.68s , +62d 02m 38.0s) | C | 60 | 16.1 | 7309 | 2021-12-16 15:22:26 | MASTER-Kislovodsk | (07h 09m 03.35s , +61d 38m 20.1s) | C | 60 | 15.9 | 7389 | 2021-12-16 15:23:46 | MASTER-Kislovodsk | (06h 54m 12.21s , +63d 56m 02.2s) | C | 60 | 15.2 | 7389 | 2021-12-16 15:23:46 | MASTER-Kislovodsk | (07h 03m 15.20s , +63d 31m 40.9s) | C | 60 | 14.6 | 7469 | 2021-12-16 15:25:06 | MASTER-Kislovodsk | (06h 50m 28.82s , +56d 21m 15.1s) | C | 60 | 16.4 | 7469 | 2021-12-16 15:25:06 | MASTER-Kislovodsk | (06h 57m 39.01s , +55d 57m 08.8s) | C | 60 | 16.2 | 7549 | 2021-12-16 15:26:26 | MASTER-Kislovodsk | (07h 19m 50.85s , +57d 49m 33.2s) | C | 60 | 15.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.