//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 32233 SUBJECT: GRB 220620B: Fermi GBM Final Real-time Localization DATE: 22/06/20 06:26:49 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 06:16:25 UT on 20 Jun 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220620B (trigger 677398590.943632 / 220620261). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 326.9, Dec = -44.6 (J2000 degrees, equivalent to J2000 21h 47m, -44d 36'), with a statistical uncertainty of 8.9 degrees. The angle from the Fermi LAT boresight is 68.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220620261/quicklook/glg_skymap_all_bn220620261.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220620261/quicklook/glg_healpix_all_bn220620261.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220620261/quicklook/glg_lc_medres34_bn220620261.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 32235 SUBJECT: Fermi GRB 220620B: Global MASTER-Net observations report DATE: 22/06/20 06:45:35 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (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 (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (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 220620B ( Fermi GBM team, GCN 32233) errorbox 1110 sec after notice time and 1150 sec after trigger time at 2022-06-20 06:35:36 UT, with upper limit up to 17.0 mag. The observations began at zenith distance = 23 deg. The sun altitude is -62.5 deg. The galactic latitude b = -50 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=2011044 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 1180 | 2022-06-20 06:35:36 | MASTER-OAFA | (21h 30m 36.32s , -43d 47m 50.1s) | C | 60 | 17.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.