{
  "submittedHow": "email",
  "body": "V.Lipunov, E.Gorbovskoy, N.Tiurina,  P.Balanutsa, , D.Vlasenko, I.Panchenko,\nA.Kuznetsov,  G.Antipov,  A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin,\nV.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU),\nO.Gress, N.Budnev (ISU),\nC.Francile,  F. Podesta, R.Podesta, E. Gonzalez  (Observatorio Astronomico Felix Aguilar (OAFA),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)\nD.Buckley (SAAO),\nR.Rebolo (The Instituto de Astrofisica de Canarias),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,\nA.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) \n\nMASTER-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 EP250404a ( EP Team et al., GCN 40051) errorbox  13675 sec after notice time and 16626 sec after trigger time at 2025-04-04 18:57:05 UT, with upper limit up to  19.5 mag. The observations began at zenith distance = 66 deg. The sun  altitude  is -28.6 deg. \n\nThe galactic latitude b = 33 deg., longitude l = 187 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=2832935\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n   16657 | 2025-04-04 18:57:05 |        MASTER-Tunka | (08h 19m 51.88s , +36d 00m 34.0s) |   C |    60 | 18.6 |        \n   16717 | 2025-04-04 18:57:05 |        MASTER-Tunka | (08h 19m 51.88s , +36d 00m 34.0s) |   C |   180 | 19.3 |  Coadd \n   16728 | 2025-04-04 18:58:16 |        MASTER-Tunka | (08h 19m 58.07s , +36d 00m 34.7s) |   C |    60 | 18.6 |        \n   16800 | 2025-04-04 18:59:28 |        MASTER-Tunka | (08h 19m 55.11s , +36d 02m 04.0s) |   C |    60 | 18.6 |        \n   16872 | 2025-04-04 19:00:41 |        MASTER-Tunka | (08h 19m 55.07s , +36d 00m 32.5s) |   C |    60 | 18.7 |        \n   16932 | 2025-04-04 19:00:41 |        MASTER-Tunka | (08h 19m 55.07s , +36d 00m 32.5s) |   C |   180 | 19.4 |  Coadd \n   16950 | 2025-04-04 19:01:58 |        MASTER-Tunka | (08h 19m 57.66s , +36d 02m 04.7s) |   C |    60 | 18.6 |        \n   17021 | 2025-04-04 19:03:09 |        MASTER-Tunka | (08h 19m 52.37s , +36d 01m 15.7s) |   C |    60 | 18.7 |        \n   17095 | 2025-04-04 19:04:24 |        MASTER-Tunka | (08h 19m 51.30s , +36d 02m 12.7s) |   C |    60 | 18.7 |        \n   17155 | 2025-04-04 19:04:24 |        MASTER-Tunka | (08h 19m 51.30s , +36d 02m 12.8s) |   C |   180 | 19.5 |  Coadd \n   17381 | 2025-04-04 19:09:09 |        MASTER-Tunka | (08h 19m 52.28s , +35d 59m 59.8s) |   C |    60 | 18.7 |        \n   17454 | 2025-04-04 19:10:22 |        MASTER-Tunka | (08h 19m 58.20s , +36d 00m 10.2s) |   C |    60 | 18.7 |        \n   17527 | 2025-04-04 19:11:35 |        MASTER-Tunka | (08h 19m 54.28s , +36d 01m 24.3s) |   C |    60 | 18.7 |        \n   17587 | 2025-04-04 19:11:35 |        MASTER-Tunka | (08h 19m 54.28s , +36d 01m 24.2s) |   C |   180 | 19.4 |  Coadd \n   17599 | 2025-04-04 19:12:48 |        MASTER-Tunka | (08h 19m 54.27s , +35d 59m 56.4s) |   C |    60 | 18.6 |        \n   17670 | 2025-04-04 19:13:59 |        MASTER-Tunka | (08h 19m 57.20s , +36d 01m 34.1s) |   C |    60 | 18.6 |        \n   17743 | 2025-04-04 19:15:12 |        MASTER-Tunka | (08h 19m 51.23s , +36d 00m 41.3s) |   C |    60 | 18.5 |        \n   17803 | 2025-04-04 19:15:12 |        MASTER-Tunka | (08h 19m 51.23s , +36d 00m 41.3s) |   C |   180 | 19.3 |  Coadd \n   17816 | 2025-04-04 19:16:24 |        MASTER-Tunka | (08h 19m 51.76s , +36d 01m 37.4s) |   C |    60 | 18.6 |        \n   17890 | 2025-04-04 19:17:39 |        MASTER-Tunka | (08h 19m 57.64s , +36d 00m 34.5s) |   C |    60 | 18.7 |        \n   17962 | 2025-04-04 19:18:51 |        MASTER-Tunka | (08h 19m 51.82s , +35d 59m 30.3s) |   C |    60 | 18.6 |        \n   18035 | 2025-04-04 19:20:04 |        MASTER-Tunka | (08h 19m 57.26s , +35d 59m 42.1s) |   C |    60 | 18.6 |        \n   18108 | 2025-04-04 19:21:16 |        MASTER-Tunka | (08h 19m 53.77s , +36d 01m 07.0s) |   C |    60 | 18.5 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n",
  "eventId": "EP250404a",
  "circularId": 40066,
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "bibcode": "2025GCN.40066....1L",
  "subject": "EP250404a: Global MASTER-Net observations report",
  "createdOn": 1743794859645
}