//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26684 SUBJECT: Fermi-LAT ANTARES coincidence /ANTARES alert 200108.39: MASTER alert and inspect observation DATE: 20/01/09 12:35:13 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, O.Gress, V.Kornilov, N.Tyurina,P.Balanutsa,A.Kuznetsov, V. Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D. Kuvshinov, F.Balakin (Lomonosov Moscow State University, SAI, Physics Department), D. Buckley(South African Astronomical Observatory), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), R. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio Astronomico Felix Aguilar OAFA), H. Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State University) MASTER Global Robotic Net (http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy,v. 2010, 30L) started alert observations of ANTARES alert 200108.39 (FermiLAT ANTARES GCN 26674) 21 sec after notice time (31 sec after trigger time) at 2020-01-08 09:25:43 UT. We also have images 9h,11h and 14h befor ANTARES alerts (MASTER LVC inspect survey). and MASTER observed this error-box at MASTER-Amur,-Kislovodsk,-IAC,-SAAO during 2020-01-08 15:41:24-23:36:23UT https://master.sai.msu.ru/site/master2/event.php?id=1254160 Optical observations and analysis proceed. MASTER-Amur robotic telescope, located in Russia (Blagoveshchensk State Pedagogical University) started alert observations of ANTARES Alert200108.39 21 sec after notice time (31 sec after trigger time) at 2020-01-08 09:25:43 UT. We started 180s exposure set. The galactic latitude b = -60 deg., longitude l = 202 deg. The observations made on zenith distance = 72 deg. The moon (93 % bright part) is 35 deg. above the horizont. The distance between moon and object is 50deg. The sun altitude was -15.5 deg. (twilight) MASTER-Kislovodsk started inspect of ANTARES Alert200108.39 at 2020-01-08 15:41:24UT. Error-box_center_Altitude was 26deg, Sun_altitude was -20deg. MASTER-SAAO started inspect of ANTARES Alert200108.39 at 2020-01-08 20:35:58UT Error-box_center_Altitude was 56deg, Sun_altitude was -27deg. MASTER-IAC started inspect of ANTARES Alert200108.39 at 2020-01-08 22:20:00UT Error-box_center_Altitude was 38deg, Sun_altitude was -51deg. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 26699 SUBJECT: ANTARES 200108A: No detection by Swift-XRT DATE: 20/01/10 16:19:42 GMT FROM: Phil Evans at U of Leicester P.A. Evans (U. Leicester), A. Tohuvavohu (U. Toronto), J.A. Kennea (PSU) and S.B. Cenko (GSFC) report on behalf of the Swift/XRT team: Swift performed a series of 19 observations tiling the sky area of the Fermi-LAT / ANTARES coincident event ANTARES 200108A (Turley et al., GCN Circ. 26674). The observations were centred on RA=02h 49m 56.5s, Dec=-18d 05' 17", with a radius of ~50', and were carried out between 22:53:41 UT on Jan 8 until 00:37:14 UT on Jan 9; the detection of GRB 200109A subsequently interrupted the campaign. We gathered between 30 s and 150 s of exposure per tile, with the typical exposure being 110 s. No X-ray sources were found, with a typical upper limit of 0.06 ct/sec (0.3-10 keV). Assuming a standard AGN spectrum (NH=3e20, Gamma=1.7) this corresponds to a 0.3-10 keV observed flux of 2.6 x 10^-12 erg/cm^-2 s^-1.