TITLE: GCN CIRCULAR NUMBER: 27448 SUBJECT: Fermi trigger No 606799116: Global MASTER-Net observations report DATE: 20/03/26 14:30:23 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 200325A ( Fermi GBM team, GCN 27434) errorbox 15 sec after notice time and 44 sec after trigger time at 2020-03-25 03:19:16 UT, with upper limit up to 19.7 mag. The observations began at zenith distance = 70 deg. The sun altitude is -19.1 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 200325A errorbox 29 sec after notice time and 59 sec after trigger time at 2020-03-25 03:19:30 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 61 deg. The sun altitude is -55.1 deg. The galactic latitude b = -34 deg., longitude l = 290 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1321238 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 50 | 2020-03-25 03:19:16 | MASTER-SAAO | (04h 23m 50.57s , -77d 32m 51.4s) | C | 10 | 18.4 | 50 | 2020-03-25 03:19:16 | MASTER-SAAO | (04h 56m 48.78s , -77d 30m 55.2s) | C | 10 | 18.1 | 64 | 2020-03-25 03:19:30 | MASTER-OAFA | (04h 39m 22.28s , -77d 37m 35.3s) | C | 10 | 17.5 | 92 | 2020-03-25 03:19:58 | MASTER-SAAO | (04h 23m 43.90s , -77d 33m 23.3s) | C | 10 | 18.4 | 92 | 2020-03-25 03:19:58 | MASTER-SAAO | (04h 56m 43.18s , -77d 31m 27.9s) | C | 10 | 18.0 | 110 | 2020-03-25 03:20:11 | MASTER-OAFA | (04h 39m 28.23s , -77d 37m 12.8s) | C | 20 | 18.2 | 140 | 2020-03-25 03:20:42 | MASTER-SAAO | (04h 23m 46.13s , -77d 32m 21.9s) | C | 20 | 19.0 | 140 | 2020-03-25 03:20:42 | MASTER-SAAO | (04h 56m 42.53s , -77d 30m 27.1s) | C | 20 | 18.6 | 167 | 2020-03-25 03:21:03 | MASTER-OAFA | (04h 39m 24.81s , -77d 35m 51.5s) | C | 30 | 18.4 | 198 | 2020-03-25 03:21:34 | MASTER-SAAO | (04h 23m 50.30s , -77d 33m 18.8s) | C | 30 | 19.2 | 198 | 2020-03-25 03:21:34 | MASTER-SAAO | (04h 56m 49.01s , -77d 31m 24.6s) | C | 30 | 18.8 | 233 | 2020-03-25 03:22:04 | MASTER-OAFA | (04h 39m 24.99s , -77d 37m 22.5s) | C | 40 | 18.7 | 265 | 2020-03-25 03:22:36 | MASTER-SAAO | (04h 23m 42.47s , -77d 34m 17.0s) | C | 40 | 19.5 | 265 | 2020-03-25 03:22:36 | MASTER-SAAO | (04h 56m 43.61s , -77d 32m 23.0s) | C | 40 | 19.1 | 309 | 2020-03-25 03:23:16 | MASTER-OAFA | (04h 39m 27.94s , -77d 35m 38.9s) | C | 50 | 18.9 | 347 | 2020-03-25 03:23:49 | MASTER-SAAO | (04h 23m 48.15s , -77d 34m 03.8s) | C | 60 | 19.7 | 347 | 2020-03-25 03:23:49 | MASTER-SAAO | (04h 56m 48.57s , -77d 32m 10.8s) | C | 60 | 19.3 | 401 | 2020-03-25 03:24:37 | MASTER-OAFA | (04h 39m 21.75s , -77d 36m 39.4s) | C | 70 | 19.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.