TITLE: GCN CIRCULAR NUMBER: 43697 SUBJECT: EP260210a: Global MASTER-Net observations report DATE: 26/02/11 15:54:23 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 EP260210a ( EP Team et al., GCN 43681) errorbox 1 days 8970 sec after notice time and 1 days 16089 sec after trigger time at 2026-02-11 14:49:07 UT, with upper limit up to 20.9 mag. The observations began at zenith distance = 41 deg. The sun altitude is -42.1 deg. The galactic latitude b = 65 deg., longitude l = 162 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3130129 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 7568 | 2026-02-10 12:25:35 | MASTER- | (11h 18m 01.50s , +46d 01m 48.3s) | C | 180 | 20.1 | 7568 | 2026-02-10 12:25:35 | MASTER- | (11h 19m 42.26s , +45d 29m 04.1s) | C | 180 | 19.9 | 7757 | 2026-02-10 12:28:45 | MASTER- | (11h 18m 02.83s , +46d 02m 53.1s) | C | 180 | 20.0 | 7757 | 2026-02-10 12:28:45 | MASTER- | (11h 19m 43.41s , +45d 30m 08.6s) | C | 180 | 19.8 | 7947 | 2026-02-10 12:31:54 | MASTER- | (11h 18m 09.32s , +46d 01m 59.2s) | C | 180 | 19.9 | 7947 | 2026-02-10 12:31:54 | MASTER- | (11h 19m 49.66s , +45d 29m 14.2s) | C | 180 | 19.7 | 8137 | 2026-02-10 12:35:04 | MASTER- | (11h 18m 03.97s , +46d 01m 06.6s) | C | 180 | 19.7 | 8137 | 2026-02-10 12:35:04 | MASTER- | (11h 19m 44.15s , +45d 28m 20.7s) | C | 180 | 19.5 | 8327 | 2026-02-10 12:38:14 | MASTER- | (11h 19m 50.14s , +45d 28m 55.2s) | C | 180 | 18.1 | 9693 | 2026-02-10 13:01:01 | MASTER- | (11h 18m 06.50s , +46d 04m 07.7s) | C | 180 | 19.5 | 9693 | 2026-02-10 13:01:01 | MASTER- | (11h 19m 42.80s , +45d 31m 23.3s) | C | 180 | 19.3 | 102519 | 2026-02-11 14:49:07 | MASTER-Tunka | (11h 17m 51.29s , +45d 05m 25.7s) | C | 60 | 20.1 | 102519 | 2026-02-11 14:49:07 | MASTER-Tunka | (11h 17m 17.48s , +45d 11m 57.6s) | C | 60 | 20.1 | 102579 | 2026-02-11 14:49:07 | MASTER-Tunka | (11h 17m 17.48s , +45d 11m 57.6s) | C | 180 | 20.8 | Coadd 102593 | 2026-02-11 14:50:21 | MASTER-Tunka | (11h 17m 48.72s , +45d 07m 01.6s) | C | 60 | 20.1 | 102593 | 2026-02-11 14:50:21 | MASTER-Tunka | (11h 17m 14.82s , +45d 13m 33.5s) | C | 60 | 20.1 | 102675 | 2026-02-11 14:51:42 | MASTER-Tunka | (11h 17m 14.77s , +45d 11m 48.3s) | C | 60 | 20.2 | 102675 | 2026-02-11 14:51:42 | MASTER-Tunka | (11h 17m 48.77s , +45d 05m 16.6s) | C | 60 | 20.1 | 102777 | 2026-02-11 14:52:55 | MASTER-Tunka | (11h 17m 18.23s , +45d 13m 40.4s) | C | 120 | 20.3 | 102897 | 2026-02-11 14:52:55 | MASTER-Tunka | (11h 17m 18.23s , +45d 13m 40.3s) | C | 360 | 20.9 | Coadd 102777 | 2026-02-11 14:52:55 | MASTER-Tunka | (11h 17m 52.48s , +45d 07m 09.3s) | C | 120 | 20.3 | 102911 | 2026-02-11 14:55:08 | MASTER-Tunka | (11h 17m 11.60s , +45d 12m 39.5s) | C | 120 | 20.4 | 102911 | 2026-02-11 14:55:08 | MASTER-Tunka | (11h 17m 46.09s , +45d 06m 09.1s) | C | 120 | 20.4 | 103052 | 2026-02-11 14:57:30 | MASTER-Tunka | (11h 17m 46.28s , +45d 07m 08.1s) | C | 120 | 20.4 | 103052 | 2026-02-11 14:57:30 | MASTER-Tunka | (11h 17m 11.47s , +45d 13m 37.9s) | C | 120 | 20.4 | 103185 | 2026-02-11 14:59:43 | MASTER-Tunka | (11h 17m 52.89s , +45d 06m 06.4s) | C | 120 | 20.3 | 103185 | 2026-02-11 14:59:43 | MASTER-Tunka | (11h 17m 17.88s , +45d 12m 35.6s) | C | 120 | 20.4 | 103349 | 2026-02-11 15:02:26 | MASTER-Tunka | (11h 16m 48.88s , +46d 09m 10.4s) | C | 120 | 20.4 | 103349 | 2026-02-11 15:02:26 | MASTER-Tunka | (11h 17m 28.36s , +46d 01m 15.6s) | C | 120 | 20.3 | 103469 | 2026-02-11 15:02:26 | MASTER-Tunka | (11h 17m 28.35s , +46d 01m 15.6s) | C | 360 | 20.8 | Coadd 103485 | 2026-02-11 15:04:42 | MASTER-Tunka | (11h 16m 55.90s , +46d 09m 20.0s) | C | 120 | 20.4 | 103485 | 2026-02-11 15:04:42 | MASTER-Tunka | (11h 17m 35.59s , +46d 01m 25.7s) | C | 120 | 20.4 | 103618 | 2026-02-11 15:06:56 | MASTER-Tunka | (11h 16m 51.63s , +46d 10m 48.7s) | C | 120 | 20.4 | 103618 | 2026-02-11 15:06:56 | MASTER-Tunka | (11h 17m 31.57s , +46d 02m 54.6s) | C | 120 | 20.3 | 103751 | 2026-02-11 15:09:09 | MASTER-Tunka | (11h 16m 51.33s , +46d 09m 05.5s) | C | 120 | 20.3 | 103751 | 2026-02-11 15:09:09 | MASTER-Tunka | (11h 17m 31.48s , +46d 01m 11.8s) | C | 120 | 20.3 | 103871 | 2026-02-11 15:09:09 | MASTER-Tunka | (11h 17m 31.47s , +46d 01m 11.8s) | C | 360 | 20.7 | Coadd 103885 | 2026-02-11 15:11:23 | MASTER-Tunka | (11h 17m 34.65s , +46d 02m 45.1s) | C | 120 | 20.3 | 103885 | 2026-02-11 15:11:23 | MASTER-Tunka | (11h 16m 54.22s , +46d 10m 39.3s) | C | 120 | 20.3 | 104023 | 2026-02-11 15:13:41 | MASTER-Tunka | (11h 17m 29.15s , +46d 02m 05.1s) | C | 120 | 20.3 | 104023 | 2026-02-11 15:13:41 | MASTER-Tunka | (11h 16m 48.47s , +46d 09m 59.3s) | C | 120 | 20.3 | 104159 | 2026-02-11 15:15:56 | MASTER-Tunka | (11h 17m 27.69s , +46d 03m 03.6s) | C | 120 | 20.3 | 104279 | 2026-02-11 15:15:56 | MASTER-Tunka | (11h 17m 27.68s , +46d 03m 03.7s) | C | 360 | 20.7 | Coadd 104159 | 2026-02-11 15:15:56 | MASTER-Tunka | (11h 16m 46.62s , +46d 10m 57.7s) | C | 120 | 20.3 | 104292 | 2026-02-11 15:18:10 | MASTER-Tunka | (11h 16m 53.54s , +46d 09m 55.8s) | C | 120 | 20.3 | 104292 | 2026-02-11 15:18:10 | MASTER-Tunka | (11h 17m 34.89s , +46d 02m 02.3s) | C | 120 | 20.2 | 104425 | 2026-02-11 15:20:23 | MASTER-Tunka | (11h 16m 46.28s , +46d 08m 53.8s) | C | 120 | 20.3 | 104425 | 2026-02-11 15:20:23 | MASTER-Tunka | (11h 17m 27.96s , +46d 01m 00.0s) | C | 120 | 20.3 | 104559 | 2026-02-11 15:22:36 | MASTER-Tunka | (11h 16m 53.19s , +46d 09m 18.6s) | C | 120 | 20.3 | 104559 | 2026-02-11 15:22:36 | MASTER-Tunka | (11h 17m 35.15s , +46d 01m 24.7s) | C | 120 | 20.3 | 104679 | 2026-02-11 15:22:36 | MASTER-Tunka | (11h 17m 35.15s , +46d 01m 24.6s) | C | 360 | 20.7 | Coadd 104693 | 2026-02-11 15:24:50 | MASTER-Tunka | (11h 16m 48.89s , +46d 10m 36.4s) | C | 120 | 20.2 | 104693 | 2026-02-11 15:24:50 | MASTER-Tunka | (11h 17m 31.14s , +46d 02m 42.6s) | C | 120 | 20.2 | 104826 | 2026-02-11 15:27:04 | MASTER-Tunka | (11h 16m 48.61s , +46d 08m 57.8s) | C | 120 | 20.2 | 104826 | 2026-02-11 15:27:04 | MASTER-Tunka | (11h 17m 31.07s , +46d 01m 04.0s) | C | 120 | 20.0 | 104964 | 2026-02-11 15:29:21 | MASTER-Tunka | (11h 16m 51.20s , +46d 10m 29.3s) | C | 120 | 20.2 | 104964 | 2026-02-11 15:29:21 | MASTER-Tunka | (11h 17m 33.89s , +46d 02m 34.8s) | C | 120 | 20.0 | 105084 | 2026-02-11 15:29:21 | MASTER-Tunka | (11h 17m 33.89s , +46d 02m 34.8s) | C | 360 | 20.6 | Coadd 105098 | 2026-02-11 15:31:35 | MASTER-Tunka | (11h 16m 44.36s , +46d 09m 44.7s) | C | 120 | 20.2 | 105098 | 2026-02-11 15:31:35 | MASTER-Tunka | (11h 17m 27.28s , +46d 01m 49.9s) | C | 120 | 20.2 | 105231 | 2026-02-11 15:33:48 | MASTER-Tunka | (11h 16m 43.65s , +46d 10m 43.2s) | C | 120 | 20.2 | 105231 | 2026-02-11 15:33:48 | MASTER-Tunka | (11h 17m 26.90s , +46d 02m 48.1s) | C | 120 | 20.2 | 105363 | 2026-02-11 15:36:01 | MASTER-Tunka | (11h 16m 49.86s , +46d 09m 40.6s) | C | 120 | 20.2 | 105363 | 2026-02-11 15:36:01 | MASTER-Tunka | (11h 17m 33.35s , +46d 01m 46.0s) | C | 120 | 20.2 | 105513 | 2026-02-11 15:36:01 | MASTER-Tunka | (11h 17m 33.35s , +46d 01m 46.1s) | C | 420 | 20.6 | Coadd 105496 | 2026-02-11 15:38:13 | MASTER-Tunka | (11h 16m 44.46s , +46d 08m 38.1s) | C | 120 | 19.8 | 105496 | 2026-02-11 15:38:13 | MASTER-Tunka | (11h 17m 28.25s , +46d 00m 43.9s) | C | 120 | 19.9 | 105659 | 2026-02-11 15:40:27 | MASTER-Tunka | (11h 16m 48.73s , +46d 08m 57.2s) | C | 180 | 20.1 | 105659 | 2026-02-11 15:40:27 | MASTER-Tunka | (11h 17m 32.92s , +46d 01m 02.1s) | C | 180 | 20.1 | 105853 | 2026-02-11 15:43:40 | MASTER-Tunka | (11h 16m 46.04s , +46d 10m 05.2s) | C | 180 | 20.1 | 105853 | 2026-02-11 15:43:40 | MASTER-Tunka | (11h 17m 30.80s , +46d 02m 10.3s) | C | 180 | 20.1 | 106045 | 2026-02-11 15:46:53 | MASTER-Tunka | (11h 17m 30.87s , +46d 00m 58.4s) | C | 180 | 20.0 | 106045 | 2026-02-11 15:46:53 | MASTER-Tunka | (11h 16m 45.59s , +46d 08m 52.7s) | C | 180 | 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/43697. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...