GRB 170524B: MASTER-OAFA observations
Abstract
MASTER robotic telescope (6 square degrees) located in OAFA was pointed to the GRB170525B (Barthelmy et al., GCN #21142) 15191 sec after notice time and 43294 sec after trigger time at 2017-05-25 22:42:14 UT. On our first (180s exposure) set we haven`t found optical transient within Master error-box (ra=90.8625 dec=-17.0861 r=0.1). The 5-sigma upper limit has been about 18.3 mag There is no OT at added images brighter 19.9 at Swift XRT position (Barthelmy et al., GCN #21142; Evans, GCN #21144 ). The observations made on zenit distance = 59 degrees, galaxy latitude b = -18 degree. The moon ( 0 % bright part) below the horizon (The altitude of the Moon is -8 degree ). Observations started at twilight. The sun altitude is -12.7 degree. The object can be observed till 2017-05-26 01:12:20 The message may be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- May 2017
- Bibcode:
- 2017GCN.21147....1P