GCN Circular 27003
Subject
GRB 200205A = Swift J0840.7-3516: optical photometry in Chilescope observatory
Date
2020-02-06T18:31:31Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Pozanenko (IKI), M. Krugov (AFIF), A. Volnova
(IKI), S. Belkin (IKI) report on behalf of IKI-FuN follow-up collaboration:
We observed the newly discovered transient X-ray pulsar Swift
J0840.7-3516 (Kennea et al., GCN 27000) initially classified as GRB
200205A (Evans et al., GCN 26982; Niwano etal., GCN 26987; Osborne
et al., GCN 26996). Observation of Chilescope RC-1000 started on Feb. 6
(UT) 02:13:56 in r'-filter. We detect optical transient (Evans et al.,
GCN 26982; Lipunov et al., GCN 26984; Melandri et al., GCN 26986;
Malesani et al., GCN 26989).
Preliminary photometry is following.
Date UT start MJD_mid Filter Exp. OT(AB) Err. UL
(mid, days) (s)
2020-02-06 02:13:56 58885.11255 r' 5*600 19.70 0.06 22.1
The photometry is based on nearby stars of APASS catalog
Ref.stars
APASS_id r��� err
45257574 15.130 0.014
45257540 14.807 0.061