//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30427 SUBJECT: GRB 210709A: Fermi GBM Final Real-time Localization DATE: 21/07/09 04:59:22 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 04:49:04 UT on 9 Jul 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210709A (trigger 647498949.307986 / 210709201). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 295.3, Dec = -44.2 (J2000 degrees, equivalent to J2000 19h 41m, -44d 12'), with a statistical uncertainty of 3.9 degrees. The angle from the Fermi LAT boresight is 75.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210709201/quicklook/glg_skymap_all_bn210709201.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/bn210709201/quicklook/glg_healpix_all_bn210709201.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210709201/quicklook/glg_lc_medres34_bn210709201.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30428 SUBJECT: Fermi GRB 210709A: Global MASTER-Net observations report DATE: 21/07/09 06:00:08 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 210709A ( Fermi GBM team, GCN 30427) errorbox 121 sec after notice time and 150 sec after trigger time at 2021-07-09 04:51:34 UT, with upper limit up to 16.2 mag. Observations started at twilight. The observations began at zenith distance = 85 deg. The sun altitude is -16.2 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 210709A errorbox 162 sec after notice time and 191 sec after trigger time at 2021-07-09 04:52:15 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 15 deg. The sun altitude is -80.9 deg. The galactic latitude b = -28 deg., longitude l = 355 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1656291 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 165 | 2021-07-09 04:51:34 | MASTER-IAC | (19h 53m 28.95s , -45d 39m 58.5s) | P| | 30 | 16.0 | 165 | 2021-07-09 04:51:34 | MASTER-IAC | (19h 52m 20.20s , -45d 33m 36.3s) | P- | 30 | 15.0 | 206 | 2021-07-09 04:52:15 | MASTER-OAFA | (19h 50m 50.37s , -44d 56m 51.2s) | C | 30 | 17.8 | 220 | 2021-07-09 04:52:24 | MASTER-IAC | (19h 53m 28.65s , -45d 38m 59.8s) | P| | 40 | 16.0 | 220 | 2021-07-09 04:52:24 | MASTER-IAC | (19h 52m 19.93s , -45d 32m 38.3s) | P- | 40 | 15.2 | 261 | 2021-07-09 04:53:04 | MASTER-OAFA | (19h 50m 47.04s , -44d 55m 48.4s) | C | 40 | 18.1 | 285 | 2021-07-09 04:53:24 | MASTER-IAC | (19h 53m 35.38s , -45d 40m 01.8s) | P| | 50 | 16.2 | 285 | 2021-07-09 04:53:24 | MASTER-IAC | (19h 52m 26.65s , -45d 33m 40.9s) | P- | 50 | 15.1 | 325 | 2021-07-09 04:54:04 | MASTER-OAFA | (19h 50m 46.92s , -44d 57m 13.3s) | C | 50 | 18.2 | 360 | 2021-07-09 04:54:34 | MASTER-IAC | (19h 53m 29.54s , -45d 41m 03.4s) | P| | 60 | 16.2 | 360 | 2021-07-09 04:54:34 | MASTER-IAC | (19h 52m 20.76s , -45d 34m 42.9s) | P- | 60 | 15.2 | 400 | 2021-07-09 04:55:14 | MASTER-OAFA | (19h 50m 50.12s , -44d 55m 29.0s) | C | 60 | 18.4 | 637 | 2021-07-09 04:58:40 | MASTER-IAC | (19h 39m 58.96s , -44d 16m 07.4s) | P| | 120 | 15.8 | 637 | 2021-07-09 04:58:40 | MASTER-IAC | (19h 38m 52.40s , -44d 09m 49.2s) | P- | 120 | 13.6 | 684 | 2021-07-09 04:59:28 | MASTER-OAFA | (19h 37m 03.50s , -43d 35m 29.7s) | C | 120 | 18.6 | 834 | 2021-07-09 05:01:48 | MASTER-OAFA | (19h 37m 10.23s , -43d 35m 29.7s) | C | 140 | 18.8 | 962 | 2021-07-09 05:03:40 | MASTER-IAC | (19h 39m 48.98s , -44d 16m 42.0s) | P| | 170 | 14.9 | 1009 | 2021-07-09 05:04:28 | MASTER-OAFA | (19h 37m 06.16s , -43d 34m 06.7s) | C | 170 | 18.9 | 1204 | 2021-07-09 05:07:37 | MASTER-OAFA | (19h 37m 06.08s , -43d 35m 44.2s) | C | 180 | 18.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30435 SUBJECT: MAXI GRB210709.93: Global MASTER-Net observations report DATE: 21/07/10 01:17:08 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210709.93 (trigger No 404728808,18h 49m 35.04s , -23d 47m 09.6s, R=1) errorbox 22 sec after notice time and 9031 sec after trigger time at 2021-07-10 00:43:14 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 33 deg. The sun altitude is -61.9 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB210709.93 errorbox 65 sec after notice time and 9074 sec after trigger time at 2021-07-10 00:43:57 UT, with upper limit up to 17.8 mag. The observations began at zenith distance = 45 deg. The sun altitude is -37.1 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB210709.93 errorbox 221 sec after notice time and 9230 sec after trigger time at 2021-07-10 00:46:33 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 52 deg. The sun altitude is -39.5 deg. The galactic latitude b = -11 deg., longitude l = 12 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1656741 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 9122 | 2021-07-10 00:43:14 | MASTER-SAAO | (18h 49m 20.18s , -23d 49m 21.2s) | P\ | 180 | 16.8 | 9165 | 2021-07-10 00:43:57 | MASTER-OAFA | (18h 45m 44.59s , -24d 28m 20.5s) | C | 180 | 17.8 | 9320 | 2021-07-10 00:46:33 | MASTER-IAC | (18h 48m 21.21s , -23d 48m 23.2s) | P| | 180 | 17.7 | 9320 | 2021-07-10 00:46:33 | MASTER-IAC | (18h 47m 31.50s , -23d 42m 56.0s) | P- | 180 | 17.6 | 9321 | 2021-07-10 00:46:34 | MASTER-SAAO | (18h 49m 26.11s , -23d 50m 11.5s) | P\ | 180 | 17.0 | 9364 | 2021-07-10 00:47:17 | MASTER-OAFA | (18h 45m 50.17s , -24d 29m 19.2s) | C | 180 | 17.8 | 9520 | 2021-07-10 00:49:53 | MASTER-IAC | (18h 48m 19.96s , -23d 47m 27.2s) | P| | 180 | 17.9 | 9520 | 2021-07-10 00:49:53 | MASTER-IAC | (18h 47m 30.25s , -23d 41m 59.2s) | P- | 180 | 17.7 | 9520 | 2021-07-10 00:49:53 | MASTER-SAAO | (18h 49m 20.57s , -23d 51m 03.3s) | P\ | 180 | 16.9 | 9564 | 2021-07-10 00:50:36 | MASTER-OAFA | (18h 45m 45.28s , -24d 30m 17.7s) | C | 180 | 17.8 | 9720 | 2021-07-10 00:53:12 | MASTER-SAAO | (18h 49m 25.49s , -23d 50m 55.4s) | P\ | 180 | 17.2 | 9722 | 2021-07-10 00:53:14 | MASTER-IAC | (18h 48m 27.11s , -23d 48m 29.4s) | P| | 180 | 17.9 | 9722 | 2021-07-10 00:53:14 | MASTER-IAC | (18h 47m 37.30s , -23d 43m 00.9s) | P- | 180 | 17.7 | 9763 | 2021-07-10 00:53:55 | MASTER-OAFA | (18h 45m 50.32s , -24d 30m 15.0s) | C | 180 | 17.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30446 SUBJECT: GRB 210709A: AstroSat CZTI detection DATE: 21/07/12 04:44:57 GMT FROM: Gaurav Waratkar at IIT,Bombay V. Prasad (IUCAA), P. Sawant (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al, 2020, arxiv:2011.07067) showed detection of a long GRB 210709A, which was also detected by Fermi-GBM (GCN 30427). The source was clearly detected in the 20-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2021-07-09 04:49:04.5 UT. The measured peak count rate associated with the burst is 201 (+40, -42) cts/s above the background in the combined data of four quadrants, with a total of 909 (+221, -239) cts. The local mean background count rate was 386 (+4, -4) cts/s. Using cumulative rates, we measure a T90 of 14 (+4, -4) s. It was also 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 [1]. 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. Links: ------ [1] http://astrosat.iucaa.in/czti/?q=grb