TITLE: GCN CIRCULAR NUMBER: 30398 SUBJECT: Integral GRB210707.02: Global MASTER-Net observations report DATE: 21/07/07 00:57:09 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), 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Integral GRB210707.02 (trigger No 9295,19h 34m 53.86s , +21d 53m 33.3s, R=0.0521667) errorbox 22 sec after trigger time at 2021-07-07 00:33:55 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 57 deg. The sun altitude is -63.9 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Integral GRB210707.02 errorbox 56 sec after trigger time at 2021-07-07 00:34:29 UT, with upper limit up to 15.2 mag. Observations started at twilight. The observations began at zenith distance = 40 deg. The sun altitude is -10.0 deg. MASTER-IAC robotic telescope located in Spain (IAC Teide Observatory) was pointed to the Integral GRB210707.02 errorbox 57 sec after trigger time at 2021-07-07 00:34:29 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 15 deg. The sun altitude is -38.8 deg. The galactic latitude b = 0 deg., longitude l = 58 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1654824 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 28 | MASTER-SAAO | P\ | 10 | 17.4 | 38 | MASTER-SAAO | P\ | 30 | 18.1 | Coadd 49 | MASTER-SAAO | P\ | 10 | 17.5 | 62 | MASTER-Kislovodsk | P| | 10 | 13.2 | 62 | MASTER-IAC | P| | 10 | 16.8 | 62 | MASTER-IAC | P- | 10 | 16.6 | 71 | MASTER-SAAO | P\ | 10 | 17.5 | 89 | MASTER-IAC | P| | 20 | 17.4 | 89 | MASTER-IAC | P- | 20 | 17.1 | 98 | MASTER-Kislovodsk | P| | 20 | 13.1 | 99 | MASTER-SAAO | P\ | 20 | 18.0 | 124 | MASTER-SAAO | P\ | 70 | 18.7 | Coadd 121 | MASTER-IAC | P| | 20 | 17.3 | 121 | MASTER-IAC | P- | 20 | 17.1 | 131 | MASTER-SAAO | P\ | 20 | 18.0 | 143 | MASTER-Kislovodsk | P| | 30 | 12.9 | 156 | MASTER-IAC | P| | 30 | 17.7 | 156 | MASTER-IAC | P- | 30 | 17.5 | 168 | MASTER-SAAO | P\ | 30 | 18.2 | 198 | MASTER-Kislovodsk | P| | 40 | 14.6 | 201 | MASTER-IAC | P| | 40 | 17.9 | 201 | MASTER-IAC | P- | 40 | 17.6 | 216 | MASTER-SAAO | P\ | 40 | 17.5 | 271 | MASTER-SAAO | P\ | 150 | 18.9 | Coadd 261 | MASTER-IAC | P| | 50 | 18.0 | 262 | MASTER-Kislovodsk | P| | 50 | 13.7 | 273 | MASTER-SAAO | P\ | 50 | 18.6 | 337 | MASTER-Kislovodsk | P| | 60 | 14.9 | 341 | MASTER-SAAO | P\ | 60 | 18.6 | 423 | MASTER-SAAO | P\ | 80 | 18.3 | 533 | MASTER-SAAO | P\ | 300 | 19.3 | Coadd 427 | MASTER-Kislovodsk | P| | 80 | 14.6 | 525 | MASTER-SAAO | P\ | 100 | 18.8 | 537 | MASTER-Kislovodsk | P| | 100 | 15.2 | 648 | MASTER-SAAO | P\ | 120 | 18.8 | 666 | MASTER-Kislovodsk | P| | 120 | 13.9 | 790 | MASTER-SAAO | P\ | 140 | 19.0 | 821 | MASTER-Kislovodsk | P| | 150 | 13.9 | 957 | MASTER-SAAO | P\ | 170 | 18.7 | The observation and reduction will continue. The message may be cited.