TITLE: GCN CIRCULAR NUMBER: 23995 SUBJECT: SWIFT GRB190324.95 Global MASTER-Net observations report DATE: 19/03/25 00:06:30 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 GRB190324.95 ( 3h 18m 18.24s , -47d 14m 20.40s, R=0.05) 2541 sec after trigger time at 2019-03-24 23:26:22 UT, with upper limit up to 17.5 mag. Observations started at twilight. The observations began at zenit distance = 45 deg. The sun altitude is -10.4 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 2632 | MASTER-OAFA | C | 180 | 16.2 | 2812 | MASTER-OAFA | C | 540 | 17.5 | Coadd Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.