TITLE: GCN CIRCULAR NUMBER: 23975 SUBJECT: SWIFT GRB190320.05 Global MASTER-Net observations report DATE: 19/03/20 04:57:34 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB190320.05 ( 7h 51m 14.64s , -45d 53m 24.00s, R=0.05) 82 sec after trigger time at 2019-03-20 01:15:58 UT, with upper limit up to 18.7 mag. The observations began at zenit distance = 17 deg. The sun altitude is -31.8 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 92 | MASTER-OAFA | C | 20 | 16.7 | 127 | MASTER-OAFA | C | 90 | 17.5 | Coadd 392 | MASTER-OAFA | C | 620 | 18.2 | Coadd 156 | MASTER-OAFA | C | 30 | 16.9 | 229 | MASTER-OAFA | C | 40 | 17.1 | 319 | MASTER-OAFA | C | 60 | 17.1 | 409 | MASTER-OAFA | C | 240 | 17.8 | Coadd 429 | MASTER-OAFA | C | 80 | 17.3 | 559 | MASTER-OAFA | C | 100 | 17.4 | 714 | MASTER-OAFA | C | 130 | 17.5 | 884 | MASTER-OAFA | C | 470 | 18.1 | Coadd 901 | MASTER-OAFA | C | 160 | 17.6 | 1111 | MASTER-OAFA | C | 180 | 17.7 | 1921 | MASTER-OAFA | C | 1800 | 18.6 | Coadd 1331 | MASTER-OAFA | C | 180 | 17.7 | 1511 | MASTER-OAFA | C | 540 | 18.2 | Coadd 1552 | MASTER-OAFA | C | 180 | 17.7 | 1772 | MASTER-OAFA | C | 180 | 17.7 | 1992 | MASTER-OAFA | C | 180 | 17.7 | 2172 | MASTER-OAFA | C | 540 | 18.1 | Coadd 2212 | MASTER-OAFA | C | 180 | 17.6 | 2433 | MASTER-OAFA | C | 180 | 17.6 | 2652 | MASTER-OAFA | C | 180 | 17.6 | 2832 | MASTER-OAFA | C | 540 | 17.6 | Coadd 2871 | MASTER-OAFA | C | 180 | 17.6 | 3090 | MASTER-OAFA | C | 180 | 17.7 | 3311 | MASTER-OAFA | C | 180 | 17.7 | 3491 | MASTER-OAFA | C | 540 | 18.2 | Coadd 4121 | MASTER-OAFA | C | 1800 | 18.7 | Coadd Filter C is a clear (unfiltred) band. The observation and reduction will continue.