Swift GRB 210901A: Global MASTER-Net observations report
Abstract
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 GRB 210901A ( S. Laha et al., GCN 30746) errorbox 6860 sec after notice time and 6950 sec after trigger time at 2021-09-01 17:00:26 UT, with upper limit up to 18.6 mag. Observations started at twilight. The observations began at zenith distance = 49 deg. The sun altitude is -8.9 deg. The galactic latitude b = -30 deg., longitude l = 318 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1706835 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 7040 | MASTER-SAAO | C | 180 | 17.4 | 7220 | MASTER-SAAO | C | 540 | 17.8 | Coadd 7240 | MASTER-SAAO | C | 180 | 17.9 | 7439 | MASTER-SAAO | C | 180 | 18.3 | 7639 | MASTER-SAAO | C | 180 | 18.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- September 2021
- Bibcode:
- 2021GCN.30747....1L