Swift GRB 210723A: Global MASTER-Net observations report
Abstract
MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB 210723A ( T. Sbarrato et al., GCN 30485) errorbox 29771 sec after notice time and 29801 sec after trigger time at 2021-07-23 23:02:52 UT, with upper limit up to 15.3 mag. Observations started at twilight. The observations began at zenith distance = 80 deg. The sun altitude is -14.6 deg. The galactic latitude b = -0 deg., longitude l = 251 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1668344 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 29891 | MASTER-OAFA | C | 180 | 15.3 | 30091 | MASTER-OAFA | C | 180 | 14.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2021
- Bibcode:
- 2021GCN.30491....1L