//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 31636 SUBJECT: GRB 220222B: Fermi GBM Final Real-time Localization DATE: 22/02/22 19:34:26 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 19:24:07 UT on 22 Feb 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220222B (trigger 667250652.136138 / 220222808). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 191.1, Dec = -33.5 (J2000 degrees, equivalent to J2000 12h 44m, -33d 30'), with a statistical uncertainty of 8.2 degrees. The angle from the Fermi LAT boresight is 109.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220222808/quicklook/glg_skymap_all_bn220222808.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/bn220222808/quicklook/glg_healpix_all_bn220222808.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220222808/quicklook/glg_lc_medres34_bn220222808.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 31637 SUBJECT: Fermi GRB 220222B: Global MASTER-Net observations report DATE: 22/02/22 20:15:26 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, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, 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 (Irkutsk State University, API), B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (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 GRB 220222B ( Fermi GBM team, GCN 31636) errorbox 437 sec after notice time and 466 sec after trigger time at 2022-02-22 19:31:53 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 70 deg. The sun altitude is -26.3 deg. The galactic latitude b = 29 deg., longitude l = 302 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1891717 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 497 | 2022-02-22 19:31:53 | MASTER-SAAO | (12h 38m 40.72s , -31d 03m 17.8s) | C | 60 | 18.6 | 576 | 2022-02-22 19:33:13 | MASTER-SAAO | (12h 48m 07.15s , -31d 04m 10.3s) | C | 60 | 18.5 | 656 | 2022-02-22 19:34:33 | MASTER-SAAO | (12h 36m 35.08s , -32d 58m 40.5s) | C | 60 | 18.9 | 736 | 2022-02-22 19:35:52 | MASTER-SAAO | (12h 46m 03.63s , -32d 57m 06.5s) | C | 60 | 18.7 | 815 | 2022-02-22 19:37:12 | MASTER-SAAO | (12h 35m 07.91s , -34d 51m 18.9s) | C | 60 | 19.0 | 895 | 2022-02-22 19:38:32 | MASTER-SAAO | (12h 44m 45.80s , -34d 52m 03.4s) | C | 60 | 18.9 | 975 | 2022-02-22 19:39:52 | MASTER-SAAO | (12h 34m 28.35s , -36d 46m 05.6s) | C | 60 | 19.0 | 1055 | 2022-02-22 19:41:12 | MASTER-SAAO | (12h 44m 20.22s , -36d 47m 01.4s) | C | 60 | 18.9 | 1134 | 2022-02-22 19:42:31 | MASTER-SAAO | (12h 18m 24.18s , -32d 57m 43.7s) | C | 60 | 19.1 | 1214 | 2022-02-22 19:43:51 | MASTER-SAAO | (12h 27m 56.03s , -32d 58m 46.3s) | C | 60 | 19.1 | 1475 | 2022-02-22 19:48:12 | MASTER-SAAO | (12h 38m 39.30s , -31d 03m 19.7s) | C | 60 | 18.9 | 1555 | 2022-02-22 19:49:32 | MASTER-SAAO | (12h 48m 05.78s , -31d 04m 14.8s) | C | 60 | 18.7 | 1635 | 2022-02-22 19:50:51 | MASTER-SAAO | (12h 36m 27.81s , -32d 59m 16.5s) | C | 60 | 18.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.