TITLE: GCN CIRCULAR NUMBER: 43427 SUBJECT: EP260116a: Global MASTER-Net observations report DATE: 26/01/16 17:09:27 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) MASTER-Tunka robotic telescope [1] located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP260116a ( EP Team et al., GCN 43424) errorbox 16387 sec after notice time and 59243 sec after trigger time at 2026-01-16 16:36:14 UT, with upper limit up to 19.6 mag. The observations began at zenith distance = 44 deg. The sun altitude is -58.9 deg. The galactic latitude b = 13 deg., longitude l = 213 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3104022 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 59273 | 2026-01-16 16:36:14 | MASTER-Tunka | (07h 33m 54.24s , +06d 54m 24.5s) | C | 60 | 18.3 | 59273 | 2026-01-16 16:36:14 | MASTER-Tunka | (07h 34m 21.60s , +06d 48m 07.1s) | C | 60 | 18.8 | 59333 | 2026-01-16 16:36:14 | MASTER-Tunka | (07h 34m 21.60s , +06d 48m 07.2s) | C | 180 | 19.5 | Coadd 59351 | 2026-01-16 16:37:32 | MASTER-Tunka | (07h 34m 00.18s , +06d 53m 22.7s) | C | 60 | 18.3 | 59351 | 2026-01-16 16:37:32 | MASTER-Tunka | (07h 34m 27.46s , +06d 47m 05.3s) | C | 60 | 18.8 | 59425 | 2026-01-16 16:38:45 | MASTER-Tunka | (07h 33m 55.76s , +06d 52m 20.0s) | C | 60 | 18.5 | 59425 | 2026-01-16 16:38:45 | MASTER-Tunka | (07h 34m 23.07s , +06d 46m 03.1s) | C | 60 | 18.8 | 59499 | 2026-01-16 16:39:59 | MASTER-Tunka | (07h 34m 01.62s , +06d 52m 23.8s) | C | 60 | 18.5 | 59499 | 2026-01-16 16:39:59 | MASTER-Tunka | (07h 34m 28.91s , +06d 46m 06.5s) | C | 60 | 19.0 | 59559 | 2026-01-16 16:39:59 | MASTER-Tunka | (07h 34m 28.91s , +06d 46m 06.5s) | C | 180 | 19.6 | Coadd 59572 | 2026-01-16 16:41:13 | MASTER-Tunka | (07h 33m 57.80s , +06d 54m 14.6s) | C | 60 | 18.5 | 59572 | 2026-01-16 16:41:13 | MASTER-Tunka | (07h 34m 25.14s , +06d 47m 57.4s) | C | 60 | 19.0 | 59647 | 2026-01-16 16:42:27 | MASTER-Tunka | (07h 33m 57.89s , +06d 52m 28.8s) | C | 60 | 18.5 | 59647 | 2026-01-16 16:42:27 | MASTER-Tunka | (07h 34m 25.22s , +06d 46m 11.7s) | C | 60 | 19.0 | 59721 | 2026-01-16 16:43:41 | MASTER-Tunka | (07h 34m 01.50s , +06d 53m 59.9s) | C | 60 | 18.6 | 59721 | 2026-01-16 16:43:41 | MASTER-Tunka | (07h 34m 28.85s , +06d 47m 42.9s) | C | 60 | 19.0 | 59795 | 2026-01-16 16:44:56 | MASTER-Tunka | (07h 33m 55.46s , +06d 53m 09.1s) | C | 60 | 18.4 | 59795 | 2026-01-16 16:44:56 | MASTER-Tunka | (07h 34m 22.81s , +06d 46m 52.3s) | C | 60 | 18.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/43427. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...