//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25259 SUBJECT: GRB 190804A: Fermi GBM Final Real-time Localization DATE: 19/08/04 01:35:19 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 01:23:27 UT on 4 Aug 2019, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 190804A (trigger 586574612.354622 / 190804058). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 108.0, Dec = -64.9 (J2000 degrees, equivalent to J2000 07h 12m, -64d 54'), with a statistical uncertainty of 12.0 degrees. The angle from the Fermi LAT boresight is 117.0 degrees. The skymap can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190804058/quicklook/glg_skymap_all_bn190804058.png The HEALPix FITS file, including the estimated localization systematic, can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190804058/quicklook/glg_healpix_all_bn190804058.fit The GBM light curve can be found here: http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2019/bn190804058/quicklook/glg_lc_medres34_bn190804058.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25260 SUBJECT: Fermi trigger No 586574612 Global MASTER-Net observations report DATE: 19/08/04 03:31:08 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 (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-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 Fermi GRB190804.06 (trigger No 586574612, 6h 52m 50.40s , -26d 58m 48.00s, R=5.68) errorbox 3811 sec after trigger time at 2019-08-04 02:26:58 UT, with upper limit up to 18.8 mag. The observations began at zenit distance = 73 deg. The sun altitude is -38.1 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1095608 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 3842 | 2019-08-04 02:26:58 | MASTER-SAAO | ( 6h 25m 15.97s , -27d 56m 56.20s) | C | 60 | 18.6 | 4137 | 2019-08-04 02:31:54 | MASTER-SAAO | ( 6h 34m 19.46s , -27d 56m 45.26s) | C | 60 | 18.4 | 4236 | 2019-08-04 02:33:33 | MASTER-SAAO | ( 6h 25m 16.35s , -27d 57m 11.58s) | C | 60 | 18.8 | 4536 | 2019-08-04 02:38:33 | MASTER-SAAO | ( 6h 34m 19.72s , -27d 57m 00.21s) | C | 60 | 18.5 | 4789 | 2019-08-04 02:42:45 | MASTER-SAAO | ( 6h 43m 24.42s , -27d 56m 29.10s) | C | 60 | 18.3 | 4888 | 2019-08-04 02:44:25 | MASTER-SAAO | ( 6h 42m 02.29s , -29d 56m 28.82s) | C | 60 | 18.2 | 5085 | 2019-08-04 02:47:42 | MASTER-SAAO | ( 6h 43m 24.62s , -27d 56m 45.80s) | C | 60 | 18.4 | 5184 | 2019-08-04 02:49:20 | MASTER-SAAO | ( 6h 45m 09.76s , -25d 56m 22.68s) | C | 60 | 18.4 | 5283 | 2019-08-04 02:51:00 | MASTER-SAAO | ( 6h 52m 27.73s , -27d 56m 34.87s) | C | 60 | 18.3 | 5381 | 2019-08-04 02:52:37 | MASTER-SAAO | ( 6h 51m 17.85s , -29d 56m 13.96s) | C | 60 | 18.3 | 5479 | 2019-08-04 02:54:16 | MASTER-SAAO | ( 6h 38m 37.10s , -23d 56m 43.26s) | C | 60 | 18.5 | 5578 | 2019-08-04 02:55:54 | MASTER-SAAO | ( 6h 45m 11.29s , -25d 56m 36.08s) | C | 60 | 18.5 | 5675 | 2019-08-04 02:57:32 | MASTER-SAAO | ( 6h 54m 05.11s , -25d 56m 07.20s) | C | 60 | 18.1 | 5773 | 2019-08-04 02:59:10 | MASTER-SAAO | ( 6h 52m 26.68s , -27d 56m 07.23s) | C | 60 | 18.2 | 5871 | 2019-08-04 03:00:47 | MASTER-SAAO | ( 7h 1m 30.07s , -27d 56m 18.56s) | C | 60 | 17.9 | 5976 | 2019-08-04 03:02:32 | MASTER-SAAO | ( 6h 38m 38.84s , -23d 56m 38.16s) | C | 60 | 18.5 | 6074 | 2019-08-04 03:04:11 | MASTER-SAAO | ( 6h 47m 23.94s , -23d 56m 09.28s) | C | 60 | 18.3 | 6172 | 2019-08-04 03:05:49 | MASTER-SAAO | ( 6h 54m 04.23s , -25d 56m 02.45s) | C | 60 | 18.3 | 6371 | 2019-08-04 03:09:07 | MASTER-SAAO | ( 7h 2m 59.29s , -25d 55m 52.16s) | C | 60 | 18.2 | 6568 | 2019-08-04 03:12:25 | MASTER-SAAO | ( 6h 56m 09.31s , -23d 56m 15.64s) | C | 60 | 18.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25267 SUBJECT: MAXI GRB190804.33 Global MASTER-Net observations report DATE: 19/08/04 21:01:05 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 (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-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 GRB190804.33 (trigger No 6992871870, 15h 57m 44.64s , -44d 23m 13.20s, R=1) errorbox 32405 sec after trigger time at 2019-08-04 16:58:20 UT, with upper limit up to 19.5 mag. Observations started at twilight. The observations began at zenit distance = 14 deg. The sun altitude is -11.8 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) started inspect of the MAXI GRB190804.33 errorbox 45665 sec after trigger time at 2019-08-04 20:39:20 UT, with upper limit up to 16.4 mag. Observations started at twilight. The observations began at zenit distance = 72 deg. The sun altitude is -10.7 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1095913 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 32436 | 2019-08-04 16:58:20 | MASTER-SAAO | ( 15h 52m 08.48s , -43d 54m 03.18s) | C | 60 | 18.2 | 32592 | 2019-08-04 16:59:56 | MASTER-SAAO | ( 15h 57m 42.32s , -44d 17m 23.77s) | C | 180 | 19.1 | 32755 | 2019-08-04 17:03:39 | MASTER-SAAO | ( 15h 50m 50.95s , -43d 54m 24.34s) | C | 60 | 18.5 | 32851 | 2019-08-04 17:05:15 | MASTER-SAAO | ( 16h 1m 58.45s , -43d 54m 38.91s) | C | 60 | 18.8 | 33008 | 2019-08-04 17:06:52 | MASTER-SAAO | ( 16h 2m 51.67s , -44d 16m 44.63s) | C | 180 | 19.5 | 33167 | 2019-08-04 17:10:31 | MASTER-SAAO | ( 16h 3m 07.03s , -43d 54m 23.19s) | C | 60 | 18.9 | 45696 | 2019-08-04 20:39:20 | MASTER-IAC | ( 16h 0m 30.33s , -43d 56m 36.85s) | C | 60 | 16.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 25289 SUBJECT: GRB 190804A: AstroSat CZTI detection DATE: 19/08/08 12:06:02 GMT FROM: Prachee Ghumatkar at IUCAA/AstroSat P. Ghumatkar, 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 GRB 190804A, which was also detected by Fermi GBM (GCN #25259) and Global MASTER-Net (Lipunov V. et al., GCN #25260). The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple pulses of emission with the strongest peak at 01:23:28.0 UT. The measured peak count rate associated with the burst is 149 cts/s above the background in the combined data of four quadrants, with a total of 298 cts. The local mean background count rate was 535 cts/s. Using cumulative rates, we measure a T90 of 2 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.