TITLE: GCN CIRCULAR NUMBER: 44308 SUBJECT: EP260416a: Global MASTER-Net observations report DATE: 26/04/16 06:18:42 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-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP260416a ( EP Team et al., GCN 44307) errorbox 436 sec after trigger time at 2026-04-16 05:36:48 UT, with upper limit up to 20.7 mag. The observations began at zenith distance = 66 deg. The sun altitude is -64.5 deg. The galactic latitude b = 83 deg., longitude l = 71 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3254155 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 482 | 2026-04-16 05:36:48 | MASTER-OAFA | (13h 14m 35.21s , +31d 29m 47.4s) | C | 90 | 20.1 | 602 | 2026-04-16 05:36:48 | MASTER-OAFA | (13h 14m 35.21s , +31d 29m 47.4s) | C | 330 | 20.7 | Coadd 588 | 2026-04-16 05:38:25 | MASTER-OAFA | (13h 14m 34.93s , +31d 29m 48.7s) | C | 110 | 20.2 | 714 | 2026-04-16 05:40:21 | MASTER-OAFA | (13h 14m 34.60s , +31d 29m 49.8s) | C | 130 | 20.2 | 865 | 2026-04-16 05:42:37 | MASTER-OAFA | (13h 14m 34.22s , +31d 29m 50.9s) | C | 160 | 20.2 | 925 | 2026-04-16 05:42:37 | MASTER-OAFA | (13h 14m 34.22s , +31d 29m 50.8s) | C | 280 | 20.4 | Coadd 981 | 2026-04-16 05:45:23 | MASTER-OAFA | (13h 14m 33.92s , +31d 29m 51.3s) | C | 60 | 20.0 | 1047 | 2026-04-16 05:46:28 | MASTER-OAFA | (13h 14m 33.76s , +31d 29m 51.3s) | C | 60 | 20.0 | 1112 | 2026-04-16 05:47:34 | MASTER-OAFA | (13h 14m 33.59s , +31d 29m 51.5s) | C | 60 | 20.0 | 1172 | 2026-04-16 05:47:34 | MASTER-OAFA | (13h 14m 33.59s , +31d 29m 51.5s) | C | 180 | 20.3 | Coadd 1178 | 2026-04-16 05:48:40 | MASTER-OAFA | (13h 14m 33.42s , +31d 29m 51.9s) | C | 60 | 20.0 | 1244 | 2026-04-16 05:49:45 | MASTER-OAFA | (13h 14m 33.23s , +31d 29m 52.2s) | C | 60 | 20.0 | 1309 | 2026-04-16 05:50:51 | MASTER-OAFA | (13h 14m 33.04s , +31d 29m 52.8s) | C | 60 | 20.0 | 1369 | 2026-04-16 05:50:51 | MASTER-OAFA | (13h 14m 33.04s , +31d 29m 52.8s) | C | 180 | 20.3 | Coadd 1375 | 2026-04-16 05:51:57 | MASTER-OAFA | (13h 14m 32.87s , +31d 29m 52.7s) | C | 60 | 20.0 | 1441 | 2026-04-16 05:53:02 | MASTER-OAFA | (13h 14m 32.72s , +31d 29m 52.6s) | C | 60 | 20.0 | 1506 | 2026-04-16 05:54:08 | MASTER-OAFA | (13h 14m 32.54s , +31d 29m 52.7s) | C | 60 | 20.0 | 1566 | 2026-04-16 05:54:08 | MASTER-OAFA | (13h 14m 32.54s , +31d 29m 52.7s) | C | 180 | 20.4 | Coadd 1573 | 2026-04-16 05:55:15 | MASTER-OAFA | (13h 14m 32.35s , +31d 29m 52.6s) | C | 60 | 20.0 | 1639 | 2026-04-16 05:56:20 | MASTER-OAFA | (13h 14m 32.16s , +31d 29m 52.8s) | C | 60 | 20.0 | 1704 | 2026-04-16 05:57:26 | MASTER-OAFA | (13h 14m 32.01s , +31d 29m 52.6s) | C | 60 | 20.0 | 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/44308. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...