GRB 180314A: MASTER-Net OT dtetctionстатья

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[1] Grb 180314a: Master-net ot dtetction / V. Lipunov, E. Gorbovskoy, N. Tyurina et al. // The Gamma-Ray Coordinates Network Circular. — 2018. — Vol. 22481, no. 1. — P. 1–1. MASTER-IAC and MASTER-OAFA automatically pointed to GRB 180314A (D'Avanzo et al. GCN 22478, Osborne et al. GCN 22480) with optical transient detection by MASTER auto-detection system. We confirm Swift and GROND OT (D'Avanzo et al. GCN 22478, Bolmer et al. GCN 22479). There are also synchronous images from MASTER very wide field cameras (MASTER-VWFC). MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru ,Lipunov et al. Advances in Astronomy, 2010, 30L) located in Teyde observatory(Spain) was pointed to the GRB180314.03 7 sec after notice time and 100 sec after trigger time at 2018-03-14 00:45:11 UT. On our first (20s exposure) set we found 1 optical transient within SWIFT error-box (ra=99.275 dec=-24.4908 r=0.05) : T-Tmid Date Time Expt. Ra Dec Mag ———|———————|——-|—————–|—————–|——- 110 2018-03-14 00:45:11 20 ( 6h 37m 03.7s , -24d 29m 45.8s) 15.36 The 5-sigma upper limit on the first 20s image is 17.2mag The observations made on zenit distance = 83 degrees, galaxy latitude b = -13 degree. The moon (12 % bright part) below the horizon (The altitude of the Moon is -59 degree ). The sun altitude is -63.5 degree. MASTER-OAFA robotic telescope located in Argentina was pointed to the GRB180314A 17 sec after notice time and 110 sec after trigger time at 2018-03-14 00:45:21 UT. On our first (20s exposure) set we found 1 optical transient within SWIFT error-box (ra=99.275 dec=-24.4908 r=0.05) T-Tmid Date Time Expt. Ra Dec Mag ———|———————|——-|—————–|—————–|——- 120 2018-03-14 00:45:21 20 ( 6h 37m 03.7s , -24d 29m 45.8s) 15.60 The 5-sigma upper limit on first 20s image is 18.4 mag The observations made on zenit distance = 15 degrees, galaxy latitude b = -13 degree. The moon (12 % bright part) below the horizon (The altitude of the Moon is -37 degree ). The sun altitude is -23.5 degree. The message may be cited.

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