//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 29789 SUBJECT: GRB 210411A: Fermi GBM Final Real-time Localization DATE: 21/04/11 03:41:20 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 03:30:56 UT on 11 Apr 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210411A (trigger 639804661.435174 / 210411146). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 259.4, Dec = -27.4 (J2000 degrees, equivalent to J2000 17h 17m, -27d 23'), with a statistical uncertainty of 3.0 degrees. The angle from the Fermi LAT boresight is 90.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210411146/quicklook/glg_skymap_all_bn210411146.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/bn210411146/quicklook/glg_healpix_all_bn210411146.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210411146/quicklook/glg_lc_medres34_bn210411146.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 29791 SUBJECT: Fermi GRB 210411A: Global MASTER-Net observations report DATE: 21/04/11 07:26:49 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 210411A ( Fermi GBM team, GCN 29789) errorbox 471 sec after notice time and 547 sec after trigger time at 2021-04-11 03:40:04 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 65 deg. The sun altitude is -63.8 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210411A errorbox 519 sec after notice time and 595 sec after trigger time at 2021-04-11 03:40:52 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 59 deg. The sun altitude is -37.5 deg. The galactic latitude b = 5 deg., longitude l = 358 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1589139 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 578 | 2021-04-11 03:40:04 | MASTER-OAFA | (17h 23m 57.03s , -26d 40m 24.3s) | C | 60 | 16.8 | 656 | 2021-04-11 03:40:52 | MASTER-IAC | (17h 16m 27.13s , -27d 21m 57.1s) | P| | 120 | 17.5 | 656 | 2021-04-11 03:40:52 | MASTER-IAC | (17h 15m 35.27s , -27d 16m 25.1s) | P- | 120 | 17.1 | 687 | 2021-04-11 03:41:23 | MASTER-OAFA | (17h 15m 40.62s , -28d 03m 11.8s) | C | 120 | 16.8 | 811 | 2021-04-11 03:43:12 | MASTER-IAC | (17h 16m 20.96s , -27d 22m 43.5s) | P| | 150 | 17.7 | 811 | 2021-04-11 03:43:12 | MASTER-IAC | (17h 15m 29.22s , -27d 17m 12.1s) | P- | 150 | 17.3 | 842 | 2021-04-11 03:43:43 | MASTER-OAFA | (17h 15m 36.38s , -28d 04m 04.6s) | C | 150 | 16.8 | 996 | 2021-04-11 03:46:02 | MASTER-IAC | (17h 16m 19.84s , -27d 21m 46.4s) | P| | 180 | 17.8 | 996 | 2021-04-11 03:46:02 | MASTER-IAC | (17h 15m 28.23s , -27d 16m 14.6s) | P- | 180 | 17.4 | 1026 | 2021-04-11 03:46:32 | MASTER-OAFA | (17h 15m 35.02s , -28d 03m 04.0s) | C | 180 | 16.8 | 1196 | 2021-04-11 03:49:22 | MASTER-IAC | (17h 16m 27.03s , -27d 22m 48.9s) | P| | 180 | 17.9 | 1196 | 2021-04-11 03:49:22 | MASTER-IAC | (17h 15m 35.46s , -27d 17m 16.5s) | P- | 180 | 17.4 | 1226 | 2021-04-11 03:49:52 | MASTER-OAFA | (17h 15m 41.93s , -28d 04m 03.5s) | C | 180 | 16.8 | 1336 | 2021-04-11 03:52:42 | MASTER-IAC | (16h 57m 35.03s , -25d 59m 03.8s) | C | 60 | 18.1 | 1743 | 2021-04-11 03:59:29 | MASTER-OAFA | (17h 07m 01.29s , -28d 38m 16.1s) | C | 60 | 15.9 | 1902 | 2021-04-11 04:02:08 | MASTER-OAFA | (17h 08m 31.62s , -30d 40m 19.6s) | C | 60 | 16.4 | 1982 | 2021-04-11 04:03:28 | MASTER-OAFA | (17h 25m 05.73s , -28d 38m 57.0s) | C | 60 | 16.7 | 2061 | 2021-04-11 04:04:47 | MASTER-OAFA | (17h 07m 39.23s , -24d 38m 32.1s) | C | 60 | 17.1 | 2141 | 2021-04-11 04:06:06 | MASTER-OAFA | (17h 26m 59.74s , -30d 38m 52.5s) | C | 60 | 17.1 | 2220 | 2021-04-11 04:07:26 | MASTER-OAFA | (17h 25m 04.94s , -24d 40m 44.2s) | C | 60 | 17.1 | 2776 | 2021-04-11 04:16:42 | MASTER-OAFA | (17h 24m 30.83s , -26d 40m 18.9s) | C | 60 | 17.0 | 2856 | 2021-04-11 04:18:02 | MASTER-OAFA | (17h 33m 22.43s , -26d 39m 19.0s) | C | 60 | 16.7 | 3094 | 2021-04-11 04:22:00 | MASTER-OAFA | (17h 06m 55.34s , -28d 39m 13.6s) | C | 60 | 16.6 | 3174 | 2021-04-11 04:23:20 | MASTER-OAFA | (17h 15m 59.88s , -28d 38m 29.9s) | C | 60 | 16.5 | 3253 | 2021-04-11 04:24:39 | MASTER-OAFA | (17h 06m 42.93s , -26d 39m 11.2s) | C | 60 | 17.0 | 3333 | 2021-04-11 04:25:59 | MASTER-OAFA | (17h 15m 32.72s , -26d 40m 27.0s) | C | 60 | 17.3 | 3413 | 2021-04-11 04:27:19 | MASTER-OAFA | (17h 08m 38.69s , -30d 40m 14.5s) | C | 60 | 16.5 | 3492 | 2021-04-11 04:28:38 | MASTER-OAFA | (17h 17m 49.03s , -30d 38m 47.3s) | C | 60 | 16.9 | 3572 | 2021-04-11 04:29:58 | MASTER-OAFA | (17h 25m 05.83s , -28d 40m 40.6s) | C | 60 | 16.4 | 3652 | 2021-04-11 04:31:17 | MASTER-OAFA | (17h 34m 13.32s , -28d 39m 33.2s) | C | 60 | 17.1 | 3731 | 2021-04-11 04:32:37 | MASTER-OAFA | (17h 07m 34.30s , -24d 39m 09.5s) | C | 60 | 17.2 | 3810 | 2021-04-11 04:33:56 | MASTER-OAFA | (17h 16m 19.44s , -24d 38m 25.5s) | C | 60 | 17.5 | 3890 | 2021-04-11 04:35:16 | MASTER-OAFA | (17h 27m 06.93s , -30d 39m 52.1s) | C | 60 | 17.2 | 4049 | 2021-04-11 04:37:55 | MASTER-OAFA | (17h 25m 10.73s , -24d 40m 23.0s) | C | 60 | 17.0 | 4447 | 2021-04-11 04:44:33 | MASTER-OAFA | (16h 57m 52.45s , -28d 37m 54.7s) | C | 60 | 16.8 | 4561 | 2021-04-11 04:45:27 | MASTER-IAC | (17h 16m 28.39s , -27d 23m 28.5s) | C | 180 | 18.0 | 4561 | 2021-04-11 04:45:27 | MASTER-IAC | (17h 15m 35.51s , -27d 17m 35.6s) | C | 180 | 17.8 | 4761 | 2021-04-11 04:48:47 | MASTER-IAC | (17h 16m 26.15s , -27d 21m 56.5s) | C | 180 | 18.2 | 4761 | 2021-04-11 04:48:47 | MASTER-IAC | (17h 15m 33.23s , -27d 16m 03.3s) | C | 180 | 18.0 | 4848 | 2021-04-11 04:51:14 | MASTER-OAFA | (17h 24m 28.58s , -26d 40m 23.5s) | C | 60 | 17.2 | 4961 | 2021-04-11 04:52:07 | MASTER-IAC | (17h 14m 50.98s , -24d 59m 25.1s) | C | 180 | 18.4 | 4961 | 2021-04-11 04:52:07 | MASTER-IAC | (17h 13m 59.01s , -24d 53m 30.8s) | C | 180 | 18.1 | 4927 | 2021-04-11 04:52:33 | MASTER-OAFA | (17h 33m 24.93s , -26d 39m 14.1s) | C | 60 | 17.7 | 5086 | 2021-04-11 04:55:12 | MASTER-OAFA | (17h 06m 56.82s , -28d 38m 10.1s) | C | 60 | 16.6 | 5162 | 2021-04-11 04:55:28 | MASTER-IAC | (17h 14m 54.31s , -24d 57m 58.9s) | C | 180 | 18.3 | 5162 | 2021-04-11 04:55:28 | MASTER-IAC | (17h 14m 02.39s , -24d 52m 04.4s) | C | 180 | 18.1 | 5167 | 2021-04-11 04:56:33 | MASTER-OAFA | (17h 16m 07.09s , -28d 39m 27.1s) | C | 60 | 16.8 | 5246 | 2021-04-11 04:57:52 | MASTER-OAFA | (17h 06m 37.55s , -26d 40m 07.6s) | C | 60 | 17.0 | 5362 | 2021-04-11 04:58:48 | MASTER-IAC | (17h 14m 48.25s , -24d 58m 33.7s) | C | 180 | 18.3 | 5362 | 2021-04-11 04:58:48 | MASTER-IAC | (17h 13m 56.34s , -24d 52m 39.2s) | C | 180 | 18.0 | 5326 | 2021-04-11 04:59:12 | MASTER-OAFA | (17h 15m 37.02s , -26d 39m 58.4s) | C | 60 | 17.4 | 5405 | 2021-04-11 05:00:31 | MASTER-OAFA | (17h 08m 35.24s , -30d 38m 18.2s) | C | 60 | 16.6 | 5489 | 2021-04-11 05:01:55 | MASTER-OAFA | (17h 17m 49.41s , -30d 40m 16.0s) | C | 60 | 16.9 | 5570 | 2021-04-11 05:03:16 | MASTER-OAFA | (17h 25m 09.81s , -28d 38m 53.8s) | C | 60 | 16.7 | 5650 | 2021-04-11 05:04:36 | MASTER-OAFA | (17h 34m 06.46s , -28d 40m 01.2s) | C | 60 | 17.1 | 6166 | 2021-04-11 05:12:12 | MASTER-IAC | (17h 06m 52.58s , -26d 29m 21.6s) | C | 180 | 17.7 | 6166 | 2021-04-11 05:12:12 | MASTER-IAC | (17h 05m 58.31s , -26d 23m 16.7s) | C | 180 | 17.6 | 6365 | 2021-04-11 05:15:31 | MASTER-IAC | (17h 06m 50.56s , -26d 27m 49.5s) | C | 180 | 17.7 | 6365 | 2021-04-11 05:15:31 | MASTER-IAC | (17h 05m 56.28s , -26d 21m 43.6s) | C | 180 | 17.6 | 6565 | 2021-04-11 05:18:51 | MASTER-IAC | (17h 14m 50.19s , -29d 29m 31.1s) | C | 180 | 17.6 | 6565 | 2021-04-11 05:18:51 | MASTER-IAC | (17h 13m 54.90s , -29d 23m 26.7s) | C | 180 | 17.5 | 6765 | 2021-04-11 05:22:11 | MASTER-IAC | (17h 14m 52.37s , -29d 28m 07.3s) | C | 180 | 17.7 | 6765 | 2021-04-11 05:22:11 | MASTER-IAC | (17h 13m 57.12s , -29d 22m 02.0s) | C | 180 | 17.6 | 6965 | 2021-04-11 05:25:31 | MASTER-IAC | (17h 14m 47.25s , -25d 58m 47.6s) | C | 180 | 18.0 | 6965 | 2021-04-11 05:25:31 | MASTER-IAC | (17h 13m 53.52s , -25d 52m 41.3s) | C | 180 | 17.8 | 7165 | 2021-04-11 05:28:51 | MASTER-IAC | (17h 14m 48.35s , -25d 57m 48.6s) | C | 180 | 18.2 | 7165 | 2021-04-11 05:28:51 | MASTER-IAC | (17h 13m 54.58s , -25d 51m 41.5s) | C | 180 | 18.0 | 7365 | 2021-04-11 05:32:11 | MASTER-IAC | (17h 14m 53.08s , -25d 58m 50.2s) | C | 180 | 18.2 | 7365 | 2021-04-11 05:32:11 | MASTER-IAC | (17h 13m 59.18s , -25d 52m 42.8s) | C | 180 | 18.0 | 7565 | 2021-04-11 05:35:31 | MASTER-IAC | (17h 14m 47.34s , -25d 59m 51.5s) | C | 180 | 18.2 | 7565 | 2021-04-11 05:35:31 | MASTER-IAC | (17h 13m 53.40s , -25d 53m 44.2s) | C | 180 | 18.0 | 7765 | 2021-04-11 05:38:51 | MASTER-IAC | (17h 30m 53.67s , -28d 59m 51.5s) | C | 180 | 17.6 | 7765 | 2021-04-11 05:38:51 | MASTER-IAC | (17h 29m 58.53s , -28d 53m 45.8s) | C | 180 | 17.5 | 7965 | 2021-04-11 05:42:11 | MASTER-IAC | (17h 30m 50.06s , -28d 58m 34.3s) | C | 180 | 17.6 | 7965 | 2021-04-11 05:42:11 | MASTER-IAC | (17h 29m 54.98s , -28d 52m 28.7s) | C | 180 | 17.5 | 8166 | 2021-04-11 05:45:31 | MASTER-IAC | (17h 30m 50.90s , -24d 29m 52.0s) | C | 180 | 18.3 | 8166 | 2021-04-11 05:45:31 | MASTER-IAC | (17h 29m 57.63s , -24d 23m 44.8s) | C | 180 | 18.0 | 8365 | 2021-04-11 05:48:51 | MASTER-IAC | (17h 30m 54.12s , -24d 28m 39.8s) | C | 180 | 18.2 | 8365 | 2021-04-11 05:48:51 | MASTER-IAC | (17h 30m 00.85s , -24d 22m 31.9s) | C | 180 | 17.9 | 8566 | 2021-04-11 05:52:12 | MASTER-IAC | (17h 18m 47.18s , -30d 59m 07.8s) | C | 180 | 17.5 | 8566 | 2021-04-11 05:52:12 | MASTER-IAC | (17h 17m 51.23s , -30d 53m 02.9s) | C | 180 | 17.3 | 8766 | 2021-04-11 05:55:32 | MASTER-IAC | (17h 18m 47.47s , -30d 58m 10.4s) | C | 180 | 17.4 | 8766 | 2021-04-11 05:55:32 | MASTER-IAC | (17h 17m 51.55s , -30d 52m 04.7s) | C | 180 | 17.1 | 8966 | 2021-04-11 05:58:52 | MASTER-IAC | (17h 18m 53.62s , -22d 29m 04.5s) | C | 180 | 17.3 | 8966 | 2021-04-11 05:58:52 | MASTER-IAC | (17h 18m 01.13s , -22d 22m 55.5s) | C | 180 | 17.1 | 9166 | 2021-04-11 06:02:12 | MASTER-IAC | (17h 18m 47.44s , -22d 30m 05.5s) | C | 180 | 17.2 | 9166 | 2021-04-11 06:02:12 | MASTER-IAC | (17h 17m 54.95s , -22d 23m 56.9s) | C | 180 | 17.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.