ZTF21aayokph (AT2021lfa): Assy optical observations
Abstract
We observed the field of ZTF21aayokph (AT2021lfa) (Yao et al., GCN 29938) with AZT-20 telescope of Assy-Turgen observatory starting on 2021-05-05 (UT) 15:51:00. We clearly detect the optical transient (Yao et al., GCN 29938; Watson et al., GCN 29940; Butler et al., GCN 29941; Yao et al., GCN 29945; Fu et al., GCN 29948). Preliminary photometry of the optical transient in r',i' - filters is following Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2021-05-05 15:51:00 n/a 35*60 r' 21.20 0.06 22.5 2021-05-05 16:40:30 n/a 57*60 i' 20.83 0.06 21.8 The photometry is based on the nearby SDSS-DR12 stars. We note the same color r'-i'= 0.37 +/- 0.08 of our observations and the color which can be deduced from RATIR observations r-i = 0.42 +/- 0.07 at ~0.5 days earlier (Butler et al., GCN 29941).
- Publication:
-
GRB Coordinates Network
- Pub Date:
- May 2021
- Bibcode:
- 2021GCN.29950....1K