{
  "subject": "EP260416a: Global MASTER-Net observations report",
  "body": "V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, \nG.Antipov,  A.Sankovich, Yu.Tselik, Ya.Kechin, V.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.Sosnovskij (CrAO),\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-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. \n\nThe galactic latitude b = 83 deg., longitude l = 71 deg.\n\n\nReal time updated cover map and OT discovered available here: \nhttps://master.sai.msu.ru/site/master2/observ.php?id=3254155\n\nWe obtain a following upper limits.  \n\nTmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment\n_________|_____________________|_____________________|____________________________________|_____|_______|_______|________\n\n     482 | 2026-04-16 05:36:48 |         MASTER-OAFA | (13h 14m 35.21s , +31d 29m 47.4s) |   C |    90 | 20.1 |        \n     602 | 2026-04-16 05:36:48 |         MASTER-OAFA | (13h 14m 35.21s , +31d 29m 47.4s) |   C |   330 | 20.7 |  Coadd \n     588 | 2026-04-16 05:38:25 |         MASTER-OAFA | (13h 14m 34.93s , +31d 29m 48.7s) |   C |   110 | 20.2 |        \n     714 | 2026-04-16 05:40:21 |         MASTER-OAFA | (13h 14m 34.60s , +31d 29m 49.8s) |   C |   130 | 20.2 |        \n     865 | 2026-04-16 05:42:37 |         MASTER-OAFA | (13h 14m 34.22s , +31d 29m 50.9s) |   C |   160 | 20.2 |        \n     925 | 2026-04-16 05:42:37 |         MASTER-OAFA | (13h 14m 34.22s , +31d 29m 50.8s) |   C |   280 | 20.4 |  Coadd \n     981 | 2026-04-16 05:45:23 |         MASTER-OAFA | (13h 14m 33.92s , +31d 29m 51.3s) |   C |    60 | 20.0 |        \n    1047 | 2026-04-16 05:46:28 |         MASTER-OAFA | (13h 14m 33.76s , +31d 29m 51.3s) |   C |    60 | 20.0 |        \n    1112 | 2026-04-16 05:47:34 |         MASTER-OAFA | (13h 14m 33.59s , +31d 29m 51.5s) |   C |    60 | 20.0 |        \n    1172 | 2026-04-16 05:47:34 |         MASTER-OAFA | (13h 14m 33.59s , +31d 29m 51.5s) |   C |   180 | 20.3 |  Coadd \n    1178 | 2026-04-16 05:48:40 |         MASTER-OAFA | (13h 14m 33.42s , +31d 29m 51.9s) |   C |    60 | 20.0 |        \n    1244 | 2026-04-16 05:49:45 |         MASTER-OAFA | (13h 14m 33.23s , +31d 29m 52.2s) |   C |    60 | 20.0 |        \n    1309 | 2026-04-16 05:50:51 |         MASTER-OAFA | (13h 14m 33.04s , +31d 29m 52.8s) |   C |    60 | 20.0 |        \n    1369 | 2026-04-16 05:50:51 |         MASTER-OAFA | (13h 14m 33.04s , +31d 29m 52.8s) |   C |   180 | 20.3 |  Coadd \n    1375 | 2026-04-16 05:51:57 |         MASTER-OAFA | (13h 14m 32.87s , +31d 29m 52.7s) |   C |    60 | 20.0 |        \n    1441 | 2026-04-16 05:53:02 |         MASTER-OAFA | (13h 14m 32.72s , +31d 29m 52.6s) |   C |    60 | 20.0 |        \n    1506 | 2026-04-16 05:54:08 |         MASTER-OAFA | (13h 14m 32.54s , +31d 29m 52.7s) |   C |    60 | 20.0 |        \n    1566 | 2026-04-16 05:54:08 |         MASTER-OAFA | (13h 14m 32.54s , +31d 29m 52.7s) |   C |   180 | 20.4 |  Coadd \n    1573 | 2026-04-16 05:55:15 |         MASTER-OAFA | (13h 14m 32.35s , +31d 29m 52.6s) |   C |    60 | 20.0 |        \n    1639 | 2026-04-16 05:56:20 |         MASTER-OAFA | (13h 14m 32.16s , +31d 29m 52.8s) |   C |    60 | 20.0 |        \n    1704 | 2026-04-16 05:57:26 |         MASTER-OAFA | (13h 14m 32.01s , +31d 29m 52.6s) |   C |    60 | 20.0 |        \nFilter C is a clear (unfiltred) band. \n\n\nThe observation and reduction will continue. \nThe message may be cited.\n\n[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.\nhttp : // www.pereplet.ru/lipunov/625.html\n",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "submittedHow": "email",
  "createdOn": 1776320322545,
  "circularId": 44308,
  "eventId": "EP260416a",
  "bibcode": "2026GCN.44308....1L"
}