TITLE: GCN CIRCULAR NUMBER: 25787 SUBJECT: Integral GRB190919.99: Global MASTER-Net observations report DATE: 19/09/20 00:40:05 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 (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-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 Integral GRB190919.99 (trigger No 8377,20h 48m 58.080s , -44d 38m 49.20s, R=0.0505) errorbox 26 sec after trigger time at 2019-09-19 23:47:17 UT, with upper limit up to 19.6 mag. The observations began at zenit distance = 24 deg. The sun altitude is -17.5 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the Integral GRB190919.99 errorbox 32 sec after trigger time at 2019-09-19 23:47:23 UT, with upper limit up to 19.0 mag. The observations began at zenit distance = 77 deg. The sun altitude is -56.2 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) was pointed to the Integral GRB190919.99 errorbox 54 sec after trigger time at 2019-09-19 23:47:45 UT, with upper limit up to 16.4 mag. The observations began at zenit distance = 50 deg. The sun altitude is -54.7 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1142730 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 32 | MASTER-OAFA | C | 10 | 16.7 | 57 | MASTER-OAFA | C | 60 | 18.0 | Coadd 342 | MASTER-OAFA | C | 630 | 19.6 | Coadd 38 | MASTER-IAC | P| | 10 | 16.2 | 53 | MASTER-IAC | P| | 40 | 17.0 | Coadd 308 | MASTER-IAC | P| | 550 | 19.0 | Coadd 38 | MASTER-IAC | P- | 10 | 15.7 | 53 | MASTER-IAC | P- | 40 | 16.7 | Coadd 368 | MASTER-IAC | P- | 670 | 18.1 | Coadd 60 | MASTER-SAAO | P\ | 10 | 14.9 | 80 | MASTER-SAAO | P\ | 50 | 15.6 | Coadd 66 | MASTER-IAC | P- | 10 | 15.6 | 66 | MASTER-IAC | P| | 10 | 16.1 | 86 | MASTER-OAFA | C | 20 | 17.1 | 90 | MASTER-SAAO | P\ | 20 | 15.1 | 99 | MASTER-IAC | P| | 20 | 16.7 | 99 | MASTER-IAC | P- | 20 | 16.1 | 126 | MASTER-SAAO | P\ | 20 | 15.1 | 143 | MASTER-IAC | P| | 30 | 16.8 | 188 | MASTER-IAC | P| | 120 | 17.8 | Coadd 143 | MASTER-IAC | P- | 30 | 16.4 | 188 | MASTER-IAC | P- | 120 | 17.3 | Coadd 150 | MASTER-OAFA | C | 30 | 17.5 | 173 | MASTER-SAAO | P\ | 30 | 15.4 | 218 | MASTER-SAAO | P\ | 120 | 16.2 | Coadd 199 | MASTER-IAC | P- | 40 | 16.5 | 200 | MASTER-IAC | P| | 40 | 16.9 | 224 | MASTER-SAAO | P\ | 40 | 15.7 | 226 | MASTER-OAFA | C | 40 | 17.8 | 296 | MASTER-OAFA | C | 180 | 18.8 | Coadd 264 | MASTER-IAC | P- | 50 | 16.6 | 264 | MASTER-IAC | P| | 50 | 17.2 | 284 | MASTER-SAAO | P\ | 50 | 15.7 | 317 | MASTER-OAFA | C | 60 | 18.0 | 337 | MASTER-IAC | P- | 60 | 16.7 | 427 | MASTER-IAC | P- | 240 | 17.7 | Coadd 337 | MASTER-IAC | P| | 60 | 17.4 | 427 | MASTER-IAC | P| | 240 | 18.3 | Coadd 355 | MASTER-SAAO | P\ | 60 | 16.0 | 445 | MASTER-SAAO | P\ | 240 | 16.4 | Coadd 427 | MASTER-IAC | P- | 80 | 16.9 | 427 | MASTER-IAC | P| | 80 | 17.5 | 427 | MASTER-OAFA | C | 80 | 18.3 | 440 | MASTER-SAAO | P\ | 80 | 15.8 | 536 | MASTER-IAC | P| | 100 | 17.7 | 536 | MASTER-IAC | P- | 100 | 17.2 | 554 | MASTER-SAAO | P\ | 100 | 15.7 | 556 | MASTER-OAFA | C | 100 | 18.4 | 701 | MASTER-OAFA | C | 390 | 19.4 | Coadd 665 | MASTER-IAC | P- | 120 | 17.2 | 830 | MASTER-IAC | P- | 450 | 17.9 | Coadd 691 | MASTER-SAAO | P\ | 130 | 15.7 | 861 | MASTER-SAAO | P\ | 470 | 15.8 | Coadd 711 | MASTER-OAFA | C | 130 | 18.5 | 819 | MASTER-IAC | P| | 150 | 18.0 | 999 | MASTER-IAC | P| | 510 | 18.0 | Coadd 819 | MASTER-IAC | P- | 150 | 17.3 | 868 | MASTER-SAAO | P\ | 160 | 15.4 | 896 | MASTER-OAFA | C | 160 | 18.8 | 1006 | MASTER-IAC | P| | 180 | 17.9 | 1006 | MASTER-IAC | P- | 180 | 17.4 | 1056 | MASTER-SAAO | P\ | 180 | 14.6 | 1107 | MASTER-OAFA | C | 180 | 18.8 | 1287 | MASTER-OAFA | C | 540 | 19.5 | Coadd 1251 | MASTER-IAC | P| | 180 | 18.1 | 1251 | MASTER-IAC | P- | 180 | 17.4 | 1431 | MASTER-IAC | P- | 540 | 18.0 | Coadd 1280 | MASTER-SAAO | P\ | 180 | 15.3 | 1329 | MASTER-OAFA | C | 180 | 18.9 | 1490 | MASTER-SAAO | P\ | 180 | 15.1 | 1500 | MASTER-IAC | P| | 180 | 18.0 | 1680 | MASTER-IAC | P| | 540 | 18.6 | Coadd 1500 | MASTER-IAC | P- | 180 | 17.4 | 1550 | MASTER-OAFA | C | 180 | 18.8 | 1717 | MASTER-SAAO | P\ | 180 | 15.4 | 1744 | MASTER-IAC | P| | 180 | 17.8 | 1744 | MASTER-IAC | P- | 180 | 17.2 | 1770 | MASTER-OAFA | C | 180 | 18.9 | 1950 | MASTER-OAFA | C | 540 | 19.6 | Coadd 1928 | MASTER-SAAO | P\ | 180 | 15.3 | 1988 | MASTER-OAFA | C | 180 | 18.9 | 1990 | MASTER-IAC | P| | 180 | 17.8 | 1990 | MASTER-IAC | P- | 180 | 17.2 | 2170 | MASTER-IAC | P- | 540 | 17.8 | Coadd 2156 | MASTER-SAAO | P\ | 180 | 15.7 | 2209 | MASTER-OAFA | C | 180 | 19.0 | 2240 | MASTER-IAC | P| | 180 | 17.8 | 2240 | MASTER-IAC | P- | 180 | 17.1 | 2387 | MASTER-SAAO | P\ | 180 | 15.7 | 2431 | MASTER-OAFA | C | 180 | 19.0 | 2489 | MASTER-IAC | P| | 180 | 17.8 | 2489 | MASTER-IAC | P- | 180 | 17.1 | 2652 | MASTER-OAFA | C | 180 | 19.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.