//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 33242 SUBJECT: GRB 230201A: Fermi GBM Final Real-time Localization DATE: 23/02/01 05:50:01 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 05:39:33 UT on 1 Feb 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 230201A (trigger 696922778.405158 / 230201236). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 346.5, Dec = 43.8 (J2000 degrees, equivalent to J2000 23h 06m, 43d 47'), with a statistical uncertainty of 9.7 degrees. The angle from the Fermi LAT boresight is 126.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230201236/quicklook/glg_skymap_all_bn230201236.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230201236/quicklook/glg_healpix_all_bn230201236.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2023/bn230201236/quicklook/glg_lc_medres34_bn230201236.gif //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 33245 SUBJECT: Fermi GRB 230201A: Global MASTER-Net observations report DATE: 23/02/01 14:15:17 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-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 230201A ( Fermi GBM team, GCN 33242) errorbox 30102 sec after notice time and 30143 sec after trigger time at 2023-02-01 14:01:57 UT, with upper limit up to 16.6 mag. The observations began at zenith distance = 69 deg. The sun altitude is -51.3 deg. The galactic latitude b = -15 deg., longitude l = 104 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2195907 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 30174 | 2023-02-01 14:01:57 | MASTER-Amur | (23h 26m 10.17s , +46d 56m 59.1s) | C | 60 | 16.5 | 30253 | 2023-02-01 14:03:16 | MASTER-Amur | (23h 37m 52.83s , +46d 57m 45.0s) | C | 60 | 16.5 | 30333 | 2023-02-01 14:04:36 | MASTER-Amur | (23h 43m 41.80s , +45d 01m 42.1s) | C | 60 | 16.6 | 30413 | 2023-02-01 14:05:56 | MASTER-Amur | (23h 55m 06.14s , +45d 01m 50.0s) | C | 60 | 16.5 | 30492 | 2023-02-01 14:07:15 | MASTER-Amur | (23h 32m 04.89s , +48d 49m 45.5s) | C | 60 | 16.5 | 30572 | 2023-02-01 14:08:35 | MASTER-Amur | (23h 44m 15.31s , +48d 51m 13.9s) | C | 60 | 16.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.