//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30100 SUBJECT: GRB 210529A: Fermi GBM Final Real-time Localization DATE: 21/05/29 16:25:42 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 16:15:24 UT on 29 May 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210529A (trigger 643997729.72023 / 210529677). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 15.8, Dec = -15.7 (J2000 degrees, equivalent to J2000 01h 03m, -15d 41'), with a statistical uncertainty of 10.9 degrees. The angle from the Fermi LAT boresight is 69.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210529677/quicklook/glg_skymap_all_bn210529677.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/bn210529677/quicklook/glg_healpix_all_bn210529677.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210529677/quicklook/glg_lc_medres34_bn210529677.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30103 SUBJECT: Fermi GRB 210529A: Global MASTER-Net observations report DATE: 21/05/30 07:45:09 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, 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, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210529A ( Fermi GBM team, GCN 30100) errorbox 46458 sec after notice time and 46483 sec after trigger time at 2021-05-30 05:10:08 UT, with upper limit up to 16.7 mag. Observations started at twilight. The observations began at zenith distance = 77 deg. The sun altitude is -11.8 deg. The galactic latitude b = -78 deg., longitude l = 140 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1624095 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 46514 | 2021-05-30 05:10:08 | MASTER-IAC | (00h 57m 36.05s , -15d 53m 40.4s) | C | 60 | 16.7 | 46594 | 2021-05-30 05:11:28 | MASTER-IAC | (00h 57m 10.58s , -14d 00m 40.8s) | C | 60 | 16.6 | 46674 | 2021-05-30 05:12:48 | MASTER-IAC | (00h 58m 11.01s , -17d 49m 42.8s) | C | 60 | 16.4 | 46754 | 2021-05-30 05:14:08 | MASTER-IAC | (01h 04m 58.61s , -12d 12m 43.3s) | C | 60 | 14.0 | 46754 | 2021-05-30 05:14:08 | MASTER-IAC | (00h 56m 43.43s , -12d 07m 22.0s) | C | 60 | 16.4 | 46836 | 2021-05-30 05:15:30 | MASTER-IAC | (01h 12m 13.21s , -12d 05m 52.7s) | C | 60 | 16.3 | 46916 | 2021-05-30 05:16:51 | MASTER-IAC | (01h 04m 29.02s , -10d 18m 54.0s) | C | 60 | 15.6 | 46916 | 2021-05-30 05:16:51 | MASTER-IAC | (00h 56m 17.02s , -10d 13m 34.5s) | C | 60 | 16.5 | 46998 | 2021-05-30 05:18:12 | MASTER-IAC | (01h 12m 50.64s , -14d 00m 03.7s) | C | 60 | 16.0 | 47078 | 2021-05-30 05:19:33 | MASTER-IAC | (01h 13m 23.94s , -15d 54m 34.5s) | C | 60 | 15.8 | 47159 | 2021-05-30 05:20:53 | MASTER-IAC | (00h 58m 52.30s , -19d 41m 44.6s) | C | 60 | 15.9 | 47239 | 2021-05-30 05:22:13 | MASTER-IAC | (00h 50m 47.44s , -17d 54m 11.0s) | C | 60 | 15.6 | 47239 | 2021-05-30 05:22:13 | MASTER-IAC | (00h 42m 18.76s , -17d 48m 52.0s) | C | 60 | 16.1 | 47319 | 2021-05-30 05:23:33 | MASTER-IAC | (00h 49m 43.74s , -14d 07m 09.3s) | C | 60 | 15.6 | 47319 | 2021-05-30 05:23:33 | MASTER-IAC | (00h 41m 24.57s , -14d 01m 51.4s) | C | 60 | 16.1 | 47497 | 2021-05-30 05:26:31 | MASTER-IAC | (01h 06m 02.18s , -15d 59m 14.5s) | C | 60 | 13.5 | 47497 | 2021-05-30 05:26:31 | MASTER-IAC | (00h 57m 38.54s , -15d 53m 54.9s) | C | 60 | 15.5 | 47577 | 2021-05-30 05:27:52 | MASTER-IAC | (01h 05m 26.30s , -14d 06m 33.0s) | C | 60 | 14.7 | 47577 | 2021-05-30 05:27:52 | MASTER-IAC | (00h 57m 07.11s , -14d 01m 14.4s) | C | 60 | 15.3 | 47657 | 2021-05-30 05:29:11 | MASTER-IAC | (01h 06m 46.47s , -17d 53m 33.8s) | C | 60 | 13.4 | 47657 | 2021-05-30 05:29:11 | MASTER-IAC | (00h 58m 17.69s , -17d 48m 14.3s) | C | 60 | 14.2 | 47738 | 2021-05-30 05:30:32 | MASTER-IAC | (01h 04m 53.32s , -12d 12m 01.0s) | C | 60 | 14.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30115 SUBJECT: GRB 210529A: GECAM detection DATE: 21/06/03 01:08:14 GMT FROM: QiBin Yi at IHEP, HXMT Q. B. Yi, S. Xiao, S. L. Xiong, X. Y. Zhao, X. Y. Song, Y. Huang, C. Cai, Y. Zhao, C. Y. Li, J. C. Liu, Y. Q. Zhang, W. C. Xue, C. Zheng, Z. W. Guo, X. L. Zhao, B. X. Zhang, C. W. Wang, S. L. Xie, P. Wang, X. B. Li, W. X. Peng, R. Qiao, J. Wang, H. S. Zhao, Z. H. An, C. Chen, G. Chen, W. Chen, M. Gao, K. Gong, D. Y. Guo, J. J. He, B. Li, C. Li, C. Y. Li, J. H. Li, Q. X. Li, X. Q. Li, Y. G. Li, X. H. Liang, J. Y. Liao, J. C. Liu, X. J. Liu, Y. Q. Liu, F. J. Lu, Q. Luo, X. Ma, G. Ou, D. L. Shi, J. Y. Shi, L. M. Song, G. X. Sun, X. L. Sun, Y. L. Tuo, J. Z. Wang, X. Y. Wen, Y. B. Xu, Y. P. Xu, S. Yang, M. Yao, B. X. Zhang, C. Y. Zhang, D. L. Zhang, Fan Zhang, Fei Zhang, H. M. Zhang, K. Zhang, P. Zhang, S. N. Zhang, Z. Zhang, S. Y. Zhao, S. J. Zheng, X. Zhou (IHEP), report on behalf of GECAM team: During the commissioning phase, GECAM-B triggered a long hard GRB, GRB 210529A, at 2021-05-29T16:15:24.950 UTC (denoted as T0), which was also observed by Fermi/GBM (GCN #30100). According to the GECAM-B light curves in about 8 keV-4 MeV, this burst mainly consists of multiple pulses with a duration of about 1.3s. The GECAM light curve could be found here: http://twiki.ihep.ac.cn/pub/GECAM/GRBList/multiLCvsE_tn210529_161524.png GECAM-B localized this burst to the following position (J2000): Ra: 40.4 deg Dec: -12.9 deg Err: 26.7 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. This position is consistent with the Fermi GBM team localization (GCN 30100) 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).