//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30257 SUBJECT: GRB 210619A: Fermi GBM Final Real-time Localization DATE: 21/06/19 12:56:07 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 12:45:43 UT on 19 Jun 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210619A (trigger 645799548.729736 / 210619532). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 73.9, Dec = 12.5 (J2000 degrees, equivalent to J2000 04h 55m, 12d 30'), with a statistical uncertainty of 1.6 degrees. The angle from the Fermi LAT boresight is 93.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210619532/quicklook/glg_skymap_all_bn210619532.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/bn210619532/quicklook/glg_healpix_all_bn210619532.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210619532/quicklook/glg_lc_medres34_bn210619532.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30258 SUBJECT: GRB 210619A: BALROG localization (Fermi Trigger 645799548 / GRB 210619532) DATE: 21/06/19 13:06:01 GMT FROM: Jochen Greiner at MPE,Garching F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 645799548 at 12:45:43 on 19 June 2021 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position (1 sigma statistical errors) is: RA(2000.0) = 69.9+/-1.8 deg Decl.(2000.0) = 8.8+/-1.7 deg We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB210619532/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB210619532/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB210619532/json //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30259 SUBJECT: Swift GRB210619.99: Global MASTER-Net OT detection DATE: 21/06/20 00:05:14 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, F. Balakin, I. Gorbunov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias 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) was pointed to the GRB210619.99 22 sec after notice time and 36 sec after trigger time at 2021-06-20 00:00:02 UT. On our first (10s exposure) set we found 1 optical transient within Swift error-box (ra=319.708 dec=33.86 r=0.05) brighter than 15.3. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 41 2021-06-20 00:00:02 10 (21h 18m 52.35s , +33d 51m 01.4s) 10.4 The 5-sigma upper limit has been about 15.3mag The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30260 SUBJECT: Swift GRB210619.99: Global MASTER-Net observations report DATE: 21/06/20 00:10:13 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) was pointed to the Swift GRB210619.99 (trigger No 1056757,21h 18m 51.12s , +33d 51m 36.0s, R=0.05) errorbox 0 sec after notice time and 36 sec after trigger time at 2021-06-20 00:00:02 UT, with upper limit up to 16.7 mag. The observations began at zenith distance = 72 deg. The sun altitude is -70.4 deg. The galactic latitude b = -11 deg., longitude l = 81 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1640637 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 42 | MASTER-SAAO | P\ | 10 | 15.8 | 57 | MASTER-SAAO | P\ | 40 | 16.5 | Coadd 71 | MASTER-SAAO | P\ | 10 | 15.6 | 106 | MASTER-SAAO | P\ | 20 | 16.2 | 150 | MASTER-SAAO | P\ | 30 | 16.5 | 205 | MASTER-SAAO | P\ | 40 | 16.4 | 269 | MASTER-SAAO | P\ | 50 | 16.7 | 344 | MASTER-SAAO | P\ | 60 | 16.7 | The observation and reduction will continue. The message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30262 SUBJECT: Swift GRB210619.99: Global MASTER-Net OT detection DATE: 21/06/20 00:56:33 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, F. Balakin, I. Gorbunov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) 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) was pointed to the GRB210619.99 23 sec after notice time and 37 sec after trigger time at 2021-06-20 00:00:03 UT. On our first (10s exposure) set we found 1 optical transient within Swift error-box (ra=319.713 dec=33.86 r=0.05) brighter than 15.6. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 42 2021-06-20 00:00:03 10 (21h 18m 52.38s , +33d 51m 01.4s) 10.7 The 5-sigma upper limit has been about 15.6mag The message may be cited.