GCN Circular 31386
Subject
GRB 211227A: Lijiang 2.4m Telescope Optical Observations
Event
Date
2022-01-04T15:35:42Z (4 years ago)
From
Liping Xin at NAOC, SVOM <xlp@nao.cas.cn>
Enwei Liang (GXU), Tingfeng Yi(YNNU), Liping Xin (NAOC),
Haicheng Feng (YNAO CAS), Houjun Lv (GXU), Xianggao Wang (GXU)
and Youdong Hu (IAA) report:
We observed the field of GRB 211227A (Beardmore et al., GCN #31316)
with the Lijiang 2.4m telescope on January 3, 2022���starting at 18:23:25 UT���
about 6.8 day after trigger. The observations were performed in R band
with a total exposure of 1200 s at airmass of 1.2 and a seeing of ~1.7,
under good weather conditions.
Within the XRT enhanced errorbox (Goad et al., GCN #31322), we did not
detect any source to a depth of R > 21.5 mag calibrated by nearby
SDSS DR12 stars (SDSS J084838.92-024405.9���J084838.22-024355.7���
J084836.33-024403.8). This is consistent with other non-detections
reported (Lipunov et al., GCN #31315; Hu et al., GCN #31318;
Fu et al., GCN #31320; Strausbaugh et al.,GCN #31321; Perley, GCN #31323;
Malesani et al., GCN #31324; Belles et al., GCN #31328,
Kann et al., GCN #31341,GCN #31376 O'Connor et al.).
We thank the staff of the Lijiang 2.4m telescope,
in particular Jiangguo Wang for scheduling of these observations.