V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov, D. Vlasenko
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk State University
V. Yurkov, A. Gabovich, Yu. Sergienko
Blagoveschensk Educational State University, Blagoveschensk
R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory
MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the Swift GRB190427.19 ( 18h 40m 51.12s , +40d 19m 19.20s, R=0.05) errorbox 40 sec after trigger time at 2019-04-27 04:34:54 UT, with upper limit up to 18.6 mag. The observations began at zenit distance = 16 deg. The sun altitude is -23.5 deg.
MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB190427.19 errorbox 44 sec after trigger time at 2019-04-27 04:34:58 UT, with upper limit up to 13.2 mag. Observations started at twilight. The observations began at zenit distance = 75 deg. The sun altitude is -7.5 deg.
The galactic latitude b = -60 deg., longitude l = 98 deg.
Real time updated cover map and OT discovered available here:
We obtain a following upper limits.
Tmid-T0 | Site |Filt.| Expt. | Limit| Comment
45 | MASTER-IAC | P- | 10 | 16.8 |
45 | MASTER-IAC | P| | 10 | 17.1 |
50 | MASTER-SAAO | P\ | 10 | 13.3 |
77 | MASTER-SAAO | P\ | 10 | 13.2 |
100 | MASTER-IAC | P- | 20 | 17.4 |
100 | MASTER-IAC | P| | 20 | 17.6 |
108 | MASTER-SAAO | P\ | 20 | 13.1 |
160 | MASTER-IAC | P- | 30 | 17.7 |
160 | MASTER-IAC | P| | 30 | 17.9 |
212 | MASTER-IAC | P- | 40 | 17.9 |
212 | MASTER-IAC | P| | 40 | 18.2 |
274 | MASTER-IAC | P- | 50 | 18.1 |
274 | MASTER-IAC | P| | 50 | 18.3 |
346 | MASTER-IAC | P- | 60 | 18.3 |
346 | MASTER-IAC | P| | 60 | 18.6 |
The observation and reduction will continue.
The message may be cited.