TITLE: GCN CIRCULAR NUMBER: 27327 SUBJECT: Swift GRB200306.95: Global MASTER-Net observations report DATE: 20/03/06 23:04:08 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB200306.95 (trigger No 960102,13h 14m 19.68s , +11d 15m 18.0s, R=0.05) errorbox 18 sec after notice time and 63 sec after trigger time at 2020-03-06 22:51:42 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 32 deg. The sun altitude is -47.4 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB200306.95 errorbox 40 sec after notice time and 85 sec after trigger time at 2020-03-06 22:52:04 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 36 deg. The sun altitude is -49.3 deg. The galactic latitude b = 73 deg., longitude l = 324 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1306689 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 69 | MASTER-Kislovodsk | P- | 10 | 16.9 | 89 | MASTER-Kislovodsk | P- | 50 | 18.0 | Coadd 69 | MASTER-Kislovodsk | P| | 10 | 16.8 | 89 | MASTER-Kislovodsk | P| | 50 | 17.9 | Coadd 91 | MASTER-Kislovodsk | P- | 20 | 17.4 | 91 | MASTER-Kislovodsk | P| | 20 | 17.2 | 96 | MASTER-Tavrida | C | 20 | 17.5 | 121 | MASTER-Tavrida | C | 70 | 18.2 | Coadd 117 | MASTER-Kislovodsk | P- | 20 | 17.3 | 117 | MASTER-Kislovodsk | P| | 20 | 17.2 | 136 | MASTER-Tavrida | C | 20 | 17.5 | 149 | MASTER-Kislovodsk | P- | 30 | 17.1 | 149 | MASTER-Kislovodsk | P| | 30 | 17.5 | 184 | MASTER-Kislovodsk | P| | 100 | 18.3 | Coadd 181 | MASTER-Tavrida | C | 30 | 17.7 | 185 | MASTER-Kislovodsk | P- | 30 | 17.6 | 230 | MASTER-Kislovodsk | P- | 120 | 18.5 | Coadd 185 | MASTER-Kislovodsk | P| | 30 | 17.5 | 227 | MASTER-Kislovodsk | P- | 40 | 17.9 | 227 | MASTER-Kislovodsk | P| | 40 | 17.6 | 237 | MASTER-Tavrida | C | 40 | 18.0 | 297 | MASTER-Tavrida | C | 160 | 18.9 | Coadd 278 | MASTER-Kislovodsk | P- | 50 | 18.1 | 278 | MASTER-Kislovodsk | P| | 50 | 17.8 | 343 | MASTER-Kislovodsk | P| | 180 | 18.6 | Coadd 302 | MASTER-Tavrida | C | 50 | 18.2 | 340 | MASTER-Kislovodsk | P- | 60 | 18.2 | 420 | MASTER-Kislovodsk | P- | 220 | 18.9 | Coadd 340 | MASTER-Kislovodsk | P| | 60 | 17.9 | 383 | MASTER-Tavrida | C | 70 | 18.3 | 411 | MASTER-Kislovodsk | P- | 70 | 18.2 | 411 | MASTER-Kislovodsk | P| | 70 | 18.1 | 483 | MASTER-Tavrida | C | 90 | 18.5 | 498 | MASTER-Kislovodsk | P- | 90 | 18.2 | 498 | MASTER-Kislovodsk | P| | 90 | 18.1 | 605 | MASTER-Kislovodsk | P- | 110 | 18.2 | 605 | MASTER-Kislovodsk | P| | 110 | 18.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.