//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27876 SUBJECT: GRB 200601A: Fermi GBM Final Real-time Localization DATE: 20/06/01 02:30:08 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 02:19:49 UT on 1 Jun 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200601A (trigger 612670794.995442 / 200601097). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 36.7, Dec = 33.5 (J2000 degrees, equivalent to J2000 02h 26m, 33d 30'), with a statistical uncertainty of 1.7 degrees. The angle from the Fermi LAT boresight is 66.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200601097/quicklook/glg_skymap_all_bn200601097.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/bn200601097/quicklook/glg_healpix_all_bn200601097.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200601097/quicklook/glg_lc_medres34_bn200601097.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27877 SUBJECT: Fermi GRB 200601A: Global MASTER-Net observations report DATE: 20/06/01 05:15:07 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), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), 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 200601A ( Fermi GBM team, GCN 27876) errorbox 8734 sec after notice time and 8763 sec after trigger time at 2020-06-01 04:45:53 UT, with upper limit up to 17.6 mag. Observations started at twilight. The observations began at zenith distance = 72 deg. The sun altitude is -16.1 deg. The galactic latitude b = -26 deg., longitude l = 122 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1370430 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 8794 | 2020-06-01 04:45:53 | MASTER-IAC | (02h 08m 25.01s , +33d 54m 13.3s) | C | 60 | 17.5 | 8794 | 2020-06-01 04:45:53 | MASTER-IAC | (02h 18m 15.55s , +33d 49m 56.3s) | C | 60 | 16.7 | 8919 | 2020-06-01 04:47:58 | MASTER-IAC | (02h 11m 40.38s , +35d 55m 25.3s) | C | 60 | 17.5 | 8919 | 2020-06-01 04:47:58 | MASTER-IAC | (02h 21m 45.69s , +35d 51m 10.0s) | C | 60 | 17.0 | 9037 | 2020-06-01 04:49:57 | MASTER-IAC | (02h 05m 27.38s , +31d 54m 52.6s) | C | 60 | 17.6 | 9038 | 2020-06-01 04:49:57 | MASTER-IAC | (02h 15m 04.89s , +31d 50m 35.2s) | C | 60 | 16.8 | 9398 | 2020-06-01 04:55:58 | MASTER-IAC | (02h 08m 21.31s , +33d 53m 58.1s) | C | 60 | 17.3 | 9398 | 2020-06-01 04:55:58 | MASTER-IAC | (02h 18m 11.77s , +33d 49m 43.5s) | C | 60 | 16.7 | 9517 | 2020-06-01 04:57:56 | MASTER-IAC | (02h 11m 40.42s , +35d 54m 00.0s) | C | 60 | 17.2 | 9517 | 2020-06-01 04:57:56 | MASTER-IAC | (02h 21m 45.36s , +35d 49m 46.7s) | C | 60 | 16.7 | 9637 | 2020-06-01 04:59:56 | MASTER-IAC | (02h 15m 07.94s , +31d 51m 13.5s) | C | 60 | 16.5 | 9763 | 2020-06-01 05:02:03 | MASTER-IAC | (02h 21m 20.94s , +29d 54m 07.3s) | C | 60 | 16.7 | 9763 | 2020-06-01 05:02:03 | MASTER-IAC | (02h 30m 46.39s , +29d 49m 46.6s) | C | 60 | 14.5 | 9879 | 2020-06-01 05:03:59 | MASTER-IAC | (02h 15m 12.84s , +37d 55m 29.6s) | C | 60 | 16.6 | 9879 | 2020-06-01 05:03:59 | MASTER-IAC | (02h 25m 33.63s , +37d 51m 16.9s) | C | 60 | 16.0 | 9997 | 2020-06-01 05:05:56 | MASTER-IAC | (02h 02m 50.92s , +29d 54m 53.3s) | C | 60 | 16.8 | 9997 | 2020-06-01 05:05:56 | MASTER-IAC | (02h 12m 15.86s , +29d 50m 37.2s) | C | 60 | 16.0 | 10116 | 2020-06-01 05:07:56 | MASTER-IAC | (02h 21m 17.05s , +29d 56m 07.0s) | C | 60 | 16.2 | 10116 | 2020-06-01 05:07:56 | MASTER-IAC | (02h 30m 42.39s , +29d 51m 47.8s) | C | 60 | 15.5 | 10247 | 2020-06-01 05:10:06 | MASTER-IAC | (02h 15m 13.90s , +37d 54m 53.3s) | C | 60 | 16.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27882 SUBJECT: GRB 200601A: Insight-HXMT/HE detection DATE: 20/06/02 07:59:21 GMT FROM: YaoGuang Zheng at IHEP Y. G. Zheng, C. Cai, Y. F. Du, W. C. Xue, Q. Luo, S. Xiao, Q. B. Yi, 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 2020-06-01T02:19:56.50 (T0), Insight-HXMT/HE detected GRB 200601A (trigger ID: HEB200601097) in a routine search of the data, which also triggered Fermi/GBM (GCN #27876). The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 149.42 s measured from T0-2.12 s. The 1-ms peak rate, measured from T0-1.08 s, is 808 cnts/sec. The total counts from this burst is 29488 counts. URL_LC: http://twiki.ihep.ac.cn/pub/HXMT/GRBList/HEB200601097_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.