Swift Trigger 755873: MASTER Net optical observations
Abstract
MASTER Kislovodsk was observed Swift Trigger 755873 since 62 sec to 2957 sec after trigger time in SWIFT error box (K.L. Page et al., GCN # 21193). MASTER -IAC and MASTER-Kislovodsk had credible conditions for observations. MASTER-Kislovodsk was pointed to the Swift Trigger 755873 12 sec after notice time and 62 sec after trigger time at 2017-06-04 21:31:54 UT. On our first (10s exposure) set we haven`t found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 16.9mag . This limit in agreement with Jelinek et al. (GCN #21194) The observations made on zenit distance = 38 degrees, galaxy latitude b = 53 degree. The moon (81 % bright part) is 20 degrees above the horizon. The distance between moon and object is 69. The sun altitude is -23.5 degree. The object can be observed till sunrise at 2017-06-05 01:28:56 . MASTER-IAC robotic telescope located in IAC was pointed to the Swift Trigger 755873 1001 sec after notice time and 1051 sec after trigger time at 2017-06-04 22:05:58 UT. The 5-sigma upper limit has been about 20.2 mag The observations made on zenit distance = 36 degrees, galaxy latitude b = 53 degree. The moon (82 % bright part) is 56 degrees above the horizon. The distance between moon and object is 69 The sun altitude is -23.6 degree. The object can be observed till sunrise at 2017-06-05 06:07:42. All our observations are in agreement with Ondrejov Robotic Telescope Limit (Jelinek et al. GCN #21194 ). This message cab be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- June 2017
- Bibcode:
- 2017GCN.21199....1E