TITLE: GCN CIRCULAR NUMBER: 28195 SUBJECT: Fermi GRB 200801B: Global MASTER-Net observations report DATE: 20/08/03 01:30:11 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), 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 GRB 200801B ( Fermi GBM team, GCN 28184) errorbox 1 days 31237 sec after notice time and 1 days 31265 sec after trigger time at 2020-08-03 00:16:52 UT, with upper limit up to 17.8 mag. The observations began at zenith distance = 74 deg. The sun altitude is -64.7 deg. The galactic latitude b = -40 deg., longitude l = 235 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1412095 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 117695 | 2020-08-03 00:16:52 | MASTER-SAAO | (04h 34m 14.12s , -34d 00m 12.6s) | C | 60 | 17.2 | 117775 | 2020-08-03 00:18:11 | MASTER-SAAO | (04h 40m 57.39s , -36d 00m 44.9s) | C | 60 | 17.4 | 117855 | 2020-08-03 00:19:31 | MASTER-SAAO | (04h 27m 58.81s , -31d 59m 52.9s) | C | 60 | 16.7 | 118436 | 2020-08-03 00:29:13 | MASTER-SAAO | (04h 34m 12.90s , -34d 00m 26.1s) | C | 60 | 17.4 | 118516 | 2020-08-03 00:30:32 | MASTER-SAAO | (04h 41m 02.38s , -36d 01m 46.2s) | C | 60 | 17.6 | 118596 | 2020-08-03 00:31:52 | MASTER-SAAO | (04h 28m 06.15s , -32d 00m 17.9s) | C | 60 | 17.0 | 118755 | 2020-08-03 00:34:32 | MASTER-SAAO | (04h 38m 34.73s , -32d 00m 30.4s) | C | 60 | 17.0 | 118755 | 2020-08-03 00:34:32 | MASTER-SAAO | (04h 46m 51.81s , -31d 59m 19.5s) | C | 60 | 16.7 | 118835 | 2020-08-03 00:35:52 | MASTER-SAAO | (04h 45m 06.92s , -34d 01m 26.8s) | C | 60 | 17.6 | 118835 | 2020-08-03 00:35:52 | MASTER-SAAO | (04h 53m 35.54s , -34d 00m 14.9s) | C | 60 | 17.3 | 118915 | 2020-08-03 00:37:11 | MASTER-SAAO | (04h 40m 53.02s , -30d 01m 20.5s) | C | 60 | 16.9 | 119074 | 2020-08-03 00:39:51 | MASTER-SAAO | (04h 38m 38.04s , -32d 00m 48.7s) | C | 60 | 17.3 | 119074 | 2020-08-03 00:39:51 | MASTER-SAAO | (04h 46m 55.19s , -31d 59m 37.1s) | C | 60 | 16.9 | 119154 | 2020-08-03 00:41:10 | MASTER-SAAO | (04h 45m 03.41s , -34d 01m 59.9s) | C | 60 | 17.8 | 119154 | 2020-08-03 00:41:10 | MASTER-SAAO | (04h 53m 32.11s , -34d 00m 47.6s) | C | 60 | 17.5 | 119234 | 2020-08-03 00:42:30 | MASTER-SAAO | (04h 40m 59.17s , -29d 59m 21.2s) | C | 60 | 17.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.