GRB 190821A: MASTER VWFC syncronous optical observations
Abstract
MASTER-SAAO very wide field cameras (d=82 mm, FOV = 2x384 sq. degree) syncronously observed GRB190821A (D'Ai et al. GCN 25427) position before, during and after trigger time. We do not see OT at Swift XRT (Gropp et al. GCN 25444) position up to 12 mag. The syncronous observation movie is avalable here: http://master.sai.msu.ru/static/MASTER_SAAO_GRB190822A.gif MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB190821A errorbox 8 sec after notice time and 41 sec after trigger time at 2019-08-21 17:10:44 UT, with upper limit up to 18.4 mag (Lipunov et al. GCN 25429; GCN 25433). Observations started at twilight. We alse do not see OT at Swift XRT. The observations began at zenit distance = 3 deg. The sun altitude is -12.4 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1111516 This message may be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2019
- Bibcode:
- 2019GCN.25448....1B