//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27482 SUBJECT: GRB 200403A: Fermi GBM Final Real-time Localization DATE: 20/04/03 21:40:37 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 21:30:16 UT on 3 Apr 2020, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 200403A (trigger 607642221.34614 / 200403896). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 81.3, Dec = 73.3 (J2000 degrees, equivalent to J2000 05h 25m, 73d 17'), with a statistical uncertainty of 1.1 degrees. The angle from the Fermi LAT boresight is 161.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200403896/quicklook/glg_skymap_all_bn200403896.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/bn200403896/quicklook/glg_healpix_all_bn200403896.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn200403896/quicklook/glg_lc_medres34_bn200403896.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27490 SUBJECT: Fermi GRB 200403A: Global MASTER-Net observations report DATE: 20/04/04 08:00:09 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), 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 200403A ( Fermi GBM team, GCN 27482) errorbox 36 sec after notice time and 64 sec after trigger time at 2020-04-03 21:31:20 UT, with upper limit up to 18.5 mag. The observations began at zenith distance = 51 deg. The sun altitude is -40.2 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 200403A errorbox 5527 sec after notice time and 5555 sec after trigger time at 2020-04-03 23:02:52 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 62 deg. The sun altitude is -35.4 deg. The galactic latitude b = 21 deg., longitude l = 142 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1329090 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 69 | 2020-04-03 21:31:20 | MASTER-Tavrida | (06h 03m 30.97s , +73d 27m 42.3s) | C | 10 | 16.8 | 105 | 2020-04-03 21:31:51 | MASTER-Tavrida | (06h 02m 42.66s , +73d 28m 28.0s) | C | 20 | 17.4 | 1393 | 2020-04-03 21:52:59 | MASTER-Tavrida | (05h 09m 17.87s , +71d 17m 20.8s) | C | 60 | 17.6 | 1474 | 2020-04-03 21:54:19 | MASTER-Tavrida | (05h 46m 40.66s , +73d 18m 35.6s) | C | 60 | 16.8 | 2917 | 2020-04-03 22:18:23 | MASTER-Tavrida | (05h 09m 20.99s , +71d 18m 05.3s) | C | 60 | 17.7 | 2997 | 2020-04-03 22:19:43 | MASTER-Tavrida | (05h 35m 03.03s , +71d 17m 48.8s) | C | 60 | 17.8 | 3078 | 2020-04-03 22:21:04 | MASTER-Tavrida | (05h 46m 51.99s , +73d 18m 07.5s) | C | 60 | 18.0 | 3158 | 2020-04-03 22:22:24 | MASTER-Tavrida | (06h 15m 43.28s , +73d 20m 59.6s) | C | 60 | 18.0 | 4576 | 2020-04-03 22:46:02 | MASTER-Tavrida | (05h 35m 07.25s , +71d 19m 49.2s) | C | 60 | 17.9 | 4657 | 2020-04-03 22:47:23 | MASTER-Tavrida | (06h 15m 55.03s , +73d 20m 01.5s) | C | 60 | 18.1 | 4737 | 2020-04-03 22:48:43 | MASTER-Tavrida | (05h 29m 21.00s , +75d 17m 32.7s) | C | 60 | 18.2 | 4818 | 2020-04-03 22:50:04 | MASTER-Tavrida | (06h 01m 00.14s , +71d 18m 50.9s) | C | 60 | 18.0 | 4898 | 2020-04-03 22:51:24 | MASTER-Tavrida | (05h 26m 01.86s , +69d 18m 22.2s) | C | 60 | 17.8 | 5059 | 2020-04-03 22:54:05 | MASTER-Tavrida | (05h 29m 14.89s , +75d 17m 27.9s) | C | 60 | 18.2 | 5220 | 2020-04-03 22:56:46 | MASTER-Tavrida | (06h 01m 00.67s , +71d 19m 57.3s) | C | 60 | 17.0 | 5586 | 2020-04-03 23:02:52 | MASTER-Kislovodsk | (04h 56m 58.20s , +72d 18m 49.4s) | C | 60 | 18.1 | 6590 | 2020-04-03 23:19:36 | MASTER-Tavrida | (06h 26m 53.55s , +71d 21m 22.8s) | C | 60 | 18.0 | 6671 | 2020-04-03 23:20:57 | MASTER-Tavrida | (05h 26m 09.73s , +69d 18m 26.5s) | C | 60 | 17.8 | 6751 | 2020-04-03 23:22:17 | MASTER-Tavrida | (05h 49m 24.89s , +69d 18m 06.2s) | C | 60 | 17.9 | 7073 | 2020-04-03 23:27:39 | MASTER-Tavrida | (06h 26m 58.66s , +71d 20m 57.9s) | C | 60 | 18.2 | 7153 | 2020-04-03 23:28:59 | MASTER-Tavrida | (05h 49m 25.62s , +69d 19m 00.9s) | C | 60 | 17.6 | 8324 | 2020-04-03 23:48:30 | MASTER-Kislovodsk | (04h 57m 13.02s , +72d 16m 06.6s) | C | 60 | 18.2 | 8404 | 2020-04-03 23:49:50 | MASTER-Kislovodsk | (05h 22m 51.79s , +72d 15m 25.0s) | C | 60 | 18.3 | 8485 | 2020-04-03 23:51:11 | MASTER-Kislovodsk | (05h 32m 54.85s , +74d 17m 11.2s) | C | 60 | 18.6 | 8646 | 2020-04-03 23:53:51 | MASTER-Kislovodsk | (05h 15m 12.48s , +70d 17m 16.5s) | C | 60 | 18.1 | 8726 | 2020-04-03 23:55:12 | MASTER-Kislovodsk | (05h 23m 00.88s , +72d 16m 18.3s) | C | 60 | 18.3 | 8806 | 2020-04-03 23:56:32 | MASTER-Kislovodsk | (05h 32m 55.40s , +74d 15m 21.6s) | C | 60 | 18.6 | 8887 | 2020-04-03 23:57:53 | MASTER-Kislovodsk | (06h 01m 51.41s , +74d 15m 53.8s) | C | 60 | 18.7 | 9208 | 2020-04-04 00:03:14 | MASTER-Kislovodsk | (05h 38m 34.54s , +70d 16m 27.1s) | C | 60 | 18.2 | 9288 | 2020-04-04 00:04:34 | MASTER-Kislovodsk | (06h 01m 49.69s , +74d 17m 41.1s) | C | 60 | 18.8 | 9449 | 2020-04-04 00:07:15 | MASTER-Kislovodsk | (05h 48m 50.54s , +72d 15m 52.3s) | C | 60 | 18.5 | 9529 | 2020-04-04 00:08:35 | MASTER-Kislovodsk | (05h 38m 38.45s , +70d 17m 08.3s) | C | 60 | 18.2 | 9770 | 2020-04-04 00:12:36 | MASTER-Kislovodsk | (05h 48m 52.83s , +72d 16m 24.0s) | C | 60 | 18.6 | 9851 | 2020-04-04 00:13:56 | MASTER-Kislovodsk | (06h 14m 31.83s , +72d 15m 46.9s) | C | 60 | 18.9 | 10203 | 2020-04-04 00:19:49 | MASTER-Tavrida | (05h 18m 04.58s , +73d 18m 13.7s) | C | 60 | 18.2 | 10252 | 2020-04-04 00:20:38 | MASTER-Kislovodsk | (06h 14m 34.61s , +72d 16m 39.5s) | C | 60 | 18.9 | 10654 | 2020-04-04 00:27:20 | MASTER-Kislovodsk | (06h 01m 57.31s , +70d 16m 29.3s) | C | 60 | 18.7 | 11055 | 2020-04-04 00:34:01 | MASTER-Kislovodsk | (06h 02m 05.17s , +70d 18m 17.8s) | C | 60 | 18.8 | 11136 | 2020-04-04 00:35:22 | MASTER-Kislovodsk | (06h 25m 21.54s , +70d 17m 10.1s) | C | 60 | 18.8 | 11457 | 2020-04-04 00:40:43 | MASTER-Kislovodsk | (06h 25m 17.95s , +70d 16m 36.9s) | C | 60 | 18.9 | 11925 | 2020-04-04 00:48:30 | MASTER-Tavrida | (05h 21m 22.25s , +74d 11m 54.5s) | C | 60 | 18.5 | 16683 | 2020-04-04 02:07:49 | MASTER-Tavrida | (05h 05m 39.87s , +70d 10m 30.5s) | C | 60 | 18.0 | 16923 | 2020-04-04 02:11:49 | MASTER-Tavrida | (06h 15m 46.19s , +70d 14m 23.5s) | C | 60 | 18.1 | 17047 | 2020-04-04 02:13:53 | MASTER-Tavrida | (05h 05m 33.52s , +70d 11m 27.4s) | C | 60 | 17.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 27492 SUBJECT: GRB 200403A: AstroSat CZTI detection DATE: 20/04/04 14:12:59 GMT FROM: Soumya Gupta at IUCAA/ASTROSAT S. Gupta, V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data showed the detection of a long GRB 200403A, which was also detected by Fermi GBM Final Real-time (GCN #27482) and Global MASTER-Net (Lipunov V. et al., GCN #27490) . The source was clearly detected in the 40-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2020-04-03 21:30:16 UT. The measured peak count rate associated with the burst is 220 +/- 18.3 cts/s above the background in the combined data of four quadrants, with a total of 2564 +/- 50.1 cts. The local mean background count rate was 578 +/- 1.2 cts/s. Using cumulative rates, we measure a T90 of 25.5 +/- 1.08 s. It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.