TITLE: GCN CIRCULAR NUMBER: 37548 SUBJECT: EP EP240918a: Global MASTER-Net observations report DATE: 24/09/18 17:18:36 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP EP240918a ( EP Team et al., GCN 37541) errorbox 151 sec after notice time and 7592 sec after trigger time at 2024-09-18 13:31:09 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 11 deg. The sun altitude is -21.2 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the EP EP240918a errorbox 11305 sec after notice time and 18746 sec after trigger time at 2024-09-18 16:37:03 UT, with upper limit up to 18.4 mag. Observations started at twilight. The observations began at zenith distance = 6 deg. The sun altitude is -9.7 deg. The galactic latitude b = 15 deg., longitude l = 78 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2606210 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 7623 | 2024-09-18 13:31:09 | MASTER-Tunka | (19h 18m 13.42s , +46d 08m 39.1s) | C | 60 | 18.7 | Coadd 7862 | 2024-09-18 13:35:08 | MASTER-Tunka | (19h 18m 10.43s , +46d 10m 42.6s) | C | 60 | 18.1 | Coadd 8024 | 2024-09-18 13:37:51 | MASTER-Tunka | (19h 18m 10.13s , +46d 08m 47.7s) | C | 60 | 18.1 | Coadd 8187 | 2024-09-18 13:40:33 | MASTER-Tunka | (19h 18m 13.05s , +46d 09m 18.0s) | C | 60 | 18.1 | Coadd 8424 | 2024-09-18 13:44:31 | MASTER-Tunka | (19h 18m 09.57s , +46d 11m 00.5s) | C | 60 | 17.9 | Coadd 8585 | 2024-09-18 13:47:11 | MASTER-Tunka | (19h 18m 09.30s , +46d 09m 05.9s) | C | 60 | 18.1 | Coadd 8747 | 2024-09-18 13:49:53 | MASTER-Tunka | (19h 18m 12.35s , +46d 09m 17.2s) | C | 60 | 18.2 | Coadd 8987 | 2024-09-18 13:53:53 | MASTER-Tunka | (19h 18m 09.73s , +46d 11m 20.2s) | C | 60 | 18.0 | Coadd 9150 | 2024-09-18 13:56:37 | MASTER-Tunka | (19h 18m 08.75s , +46d 09m 26.5s) | C | 60 | 17.7 | Coadd 9313 | 2024-09-18 13:59:20 | MASTER-Tunka | (19h 18m 11.73s , +46d 09m 54.4s) | C | 60 | 17.6 | Coadd 9559 | 2024-09-18 14:03:26 | MASTER-Tunka | (19h 18m 08.14s , +46d 11m 40.4s) | C | 60 | 17.4 | Coadd 9724 | 2024-09-18 14:06:11 | MASTER-Tunka | (19h 18m 08.54s , +46d 09m 46.4s) | C | 60 | 17.1 | Coadd 9885 | 2024-09-18 14:08:52 | MASTER-Tunka | (19h 18m 10.74s , +46d 10m 01.5s) | C | 60 | 16.8 | Coadd 10121 | 2024-09-18 14:12:48 | MASTER-Tunka | (19h 18m 08.25s , +46d 11m 59.0s) | C | 60 | 17.2 | Coadd 10282 | 2024-09-18 14:15:28 | MASTER-Tunka | (19h 18m 06.43s , +46d 10m 03.6s) | C | 60 | 17.2 | Coadd 10442 | 2024-09-18 14:18:08 | MASTER-Tunka | (19h 18m 09.63s , +46d 10m 27.6s) | C | 60 | 17.2 | Coadd 10678 | 2024-09-18 14:22:04 | MASTER-Tunka | (19h 18m 07.08s , +46d 12m 16.2s) | C | 60 | 17.3 | Coadd 10837 | 2024-09-18 14:24:44 | MASTER-Tunka | (19h 18m 06.80s , +46d 10m 20.8s) | C | 60 | 17.2 | Coadd 10997 | 2024-09-18 14:27:24 | MASTER-Tunka | (19h 18m 08.71s , +46d 10m 37.6s) | C | 60 | 17.1 | Coadd 11234 | 2024-09-18 14:31:21 | MASTER-Tunka | (19h 18m 05.10s , +46d 12m 31.8s) | C | 60 | 17.1 | Coadd 18777 | 2024-09-18 16:37:03 | MASTER-Tavrida | (19h 17m 32.41s , +46d 05m 00.9s) | C | 60 | 17.2 | 18777 | 2024-09-18 16:37:03 | MASTER-Tavrida | (19h 17m 33.33s , +46d 09m 15.9s) | C | 60 | 17.4 | 19669 | 2024-09-18 16:51:55 | MASTER-Tavrida | (19h 17m 31.56s , +46d 04m 47.0s) | C | 60 | 18.1 | 19669 | 2024-09-18 16:51:55 | MASTER-Tavrida | (19h 17m 33.22s , +46d 08m 14.1s) | C | 60 | 18.4 | 19920 | 2024-09-18 16:56:07 | MASTER-Tavrida | (19h 17m 32.46s , +46d 02m 40.9s) | C | 60 | 18.0 | 19921 | 2024-09-18 16:56:07 | MASTER-Tavrida | (19h 17m 30.82s , +45d 58m 44.6s) | C | 60 | 18.4 | 20774 | 2024-09-18 17:10:21 | MASTER-Tavrida | (19h 17m 33.63s , +46d 03m 39.5s) | C | 60 | 18.1 | 20775 | 2024-09-18 17:10:21 | MASTER-Tavrida | (19h 17m 35.14s , +46d 07m 37.3s) | C | 60 | 18.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/37548. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...