TITLE: GCN CIRCULAR NUMBER: 24878 SUBJECT: Swift GRB190624.86 Global MASTER-Net observations report DATE: 19/06/24 22:28:14 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-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 GRB190624.86 (trigger No 911102, 9h 38m 05.76s , +46d 28m 33.60s, R=0.05) errorbox 133 sec after trigger time at 2019-06-24 20:42:53 UT, with upper limit up to 18.3 mag. The observations began at zenit distance = 76 deg. The sun altitude is -23.2 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the Swift GRB190624.86 errorbox 163 sec after trigger time at 2019-06-24 20:43:23 UT, with upper limit up to 19.2 mag. Observations started at twilight. The observations began at zenit distance = 52 deg. The sun altitude is -8.6 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB190624.86 errorbox 269 sec after trigger time at 2019-06-24 20:45:09 UT, with upper limit up to 19.3 mag. The observations began at zenit distance = 72 deg. The sun altitude is -21.2 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=1056367 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 148 | MASTER-Kislovodsk | P- | 30 | 17.3 | 148 | MASTER-Kislovodsk | P| | 30 | 17.3 | 179 | MASTER-IAC | P| | 30 | 14.5 | 188 | MASTER-Kislovodsk | P- | 30 | 17.1 | 188 | MASTER-Kislovodsk | P| | 30 | 17.3 | 233 | MASTER-Kislovodsk | P- | 40 | 17.4 | 233 | MASTER-Kislovodsk | P| | 40 | 17.5 | 243 | MASTER-IAC | P| | 40 | 14.6 | 288 | MASTER-Kislovodsk | P- | 50 | 17.8 | 288 | MASTER-Kislovodsk | P| | 50 | 17.6 | 295 | MASTER-Tavrida | C | 50 | 18.0 | 375 | MASTER-Tavrida | C | 210 | 18.9 | Coadd 311 | MASTER-IAC | P| | 60 | 14.8 | 353 | MASTER-Kislovodsk | P- | 60 | 17.8 | 353 | MASTER-Kislovodsk | P| | 60 | 17.9 | 379 | MASTER-Tavrida | C | 70 | 18.2 | 391 | MASTER-IAC | P| | 70 | 15.1 | 433 | MASTER-Kislovodsk | P- | 80 | 17.9 | 433 | MASTER-Kislovodsk | P| | 80 | 17.9 | 482 | MASTER-Tavrida | C | 90 | 18.3 | 488 | MASTER-IAC | P| | 90 | 15.4 | 534 | MASTER-Kislovodsk | P- | 100 | 18.1 | 534 | MASTER-Kislovodsk | P| | 100 | 17.9 | 606 | MASTER-Tavrida | C | 110 | 18.2 | 761 | MASTER-Tavrida | C | 420 | 19.3 | Coadd 612 | MASTER-IAC | P| | 110 | 15.8 | 654 | MASTER-Kislovodsk | P- | 120 | 17.8 | 654 | MASTER-Kislovodsk | P| | 120 | 17.9 | 755 | MASTER-Tavrida | C | 140 | 18.5 | 756 | MASTER-IAC | P| | 140 | 16.3 | 794 | MASTER-Kislovodsk | P- | 140 | 18.1 | 794 | MASTER-Kislovodsk | P| | 140 | 18.0 | 929 | MASTER-IAC | P| | 170 | 16.4 | 933 | MASTER-Tavrida | C | 170 | 18.5 | 960 | MASTER-Kislovodsk | P- | 170 | 18.3 | 960 | MASTER-Kislovodsk | P| | 170 | 18.3 | 1127 | MASTER-IAC | P| | 180 | 16.7 | 1307 | MASTER-IAC | P| | 540 | 17.6 | Coadd 1937 | MASTER-IAC | P| | 1800 | 18.9 | Coadd 1127 | MASTER-IAC | P- | 180 | 16.8 | 1307 | MASTER-IAC | P- | 540 | 17.6 | Coadd 1937 | MASTER-IAC | P- | 1800 | 18.9 | Coadd 1132 | MASTER-Tavrida | C | 180 | 18.6 | 1132 | MASTER-Tavrida | C | 180 | 18.3 | 1145 | MASTER-Kislovodsk | P- | 180 | 17.9 | 1145 | MASTER-Kislovodsk | P| | 180 | 17.9 | 1345 | MASTER-Tavrida | C | 180 | 18.5 | 1345 | MASTER-Tavrida | C | 180 | 18.3 | 1349 | MASTER-Kislovodsk | P- | 180 | 17.8 | 1349 | MASTER-Kislovodsk | P| | 180 | 17.8 | 1370 | MASTER-IAC | P| | 180 | 17.1 | 1370 | MASTER-IAC | P- | 180 | 17.1 | 1554 | MASTER-Kislovodsk | P| | 180 | 17.9 | 1554 | MASTER-Kislovodsk | P- | 180 | 17.8 | 1558 | MASTER-Tavrida | C | 180 | 18.6 | 1558 | MASTER-Tavrida | C | 180 | 18.3 | 1617 | MASTER-IAC | P| | 180 | 17.5 | 1617 | MASTER-IAC | P- | 180 | 17.4 | 1758 | MASTER-Kislovodsk | P- | 180 | 17.8 | 1771 | MASTER-Tavrida | C | 180 | 18.3 | 1771 | MASTER-Tavrida | C | 180 | 18.6 | 1864 | MASTER-IAC | P| | 180 | 17.7 | 2044 | MASTER-IAC | P| | 540 | 18.6 | Coadd 1864 | MASTER-IAC | P- | 180 | 17.6 | 2044 | MASTER-IAC | P- | 540 | 18.6 | Coadd 1963 | MASTER-Kislovodsk | P- | 180 | 17.8 | 1963 | MASTER-Kislovodsk | P| | 180 | 17.6 | 1984 | MASTER-Tavrida | C | 180 | 18.3 | 1985 | MASTER-Tavrida | C | 180 | 18.3 | 2111 | MASTER-IAC | P| | 180 | 17.9 | 2111 | MASTER-IAC | P- | 180 | 17.9 | 2168 | MASTER-Kislovodsk | P- | 180 | 17.6 | 2168 | MASTER-Kislovodsk | P| | 180 | 17.6 | 2197 | MASTER-Tavrida | C | 180 | 18.2 | 2197 | MASTER-Tavrida | C | 180 | 18.3 | 2356 | MASTER-IAC | P| | 180 | 18.1 | 2356 | MASTER-IAC | P- | 180 | 18.0 | 2373 | MASTER-Kislovodsk | P- | 180 | 17.6 | 2373 | MASTER-Kislovodsk | P| | 180 | 17.6 | 2411 | MASTER-Tavrida | C | 180 | 18.3 | 2411 | MASTER-Tavrida | C | 180 | 18.3 | 2577 | MASTER-Kislovodsk | P- | 180 | 17.4 | 2577 | MASTER-Kislovodsk | P| | 180 | 17.5 | 2608 | MASTER-IAC | P| | 180 | 18.3 | 2788 | MASTER-IAC | P| | 540 | 19.2 | Coadd 2608 | MASTER-IAC | P- | 180 | 18.2 | 2788 | MASTER-IAC | P- | 540 | 19.2 | Coadd 2624 | MASTER-Tavrida | C | 180 | 18.3 | 2624 | MASTER-Tavrida | C | 180 | 18.3 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.