[vsnet-grb-info 25235] GRB 200306C: OSN 1.5m afterglow detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Mar 7 11:52:43 JST 2020
TITLE: GCN CIRCULAR
NUMBER: 27335
SUBJECT: GRB 200306C: OSN 1.5m afterglow detection
DATE: 20/03/07 02:51:33 GMT
FROM: Alexander Kann at IAA-CSIC <kann at iaa.es>
D. A. Kann, M. Blazek (both HETH/IAA-CSIC), A. de Ugarte Postigo
(HETH/IAA-CSIC, DARK/NBI), C. C. Thoene, J. F. Agui Fernandez (both
HETH/IAA-CSIC), and V. Casanova (IAA-CSIC) report:
We observed the optical afterglow position of GRB 200306C (Lipunov et
al., GCNs #27324, #27325; Gropp et al., GCN #27326; Jelinek et al., GCN
#27328; Hu et al., GCN #27329; Moskvitin, GCN #27333; Izzo & Perley, GCN
#27334) with the 1.5m telescope of the Sierra Nevada Observatory,
Granada, Spain, in the V filter. Observations began 46 minutes after the
GRB, and we obtained 18 x 30 s images under moonlight. We also obtained
four Rc images before technical problems shut down the telescope, but
stray light from a nearby bright star precludes a detection.
We detect the afterglow in a stacked image centered 0.03985 days after
the GRB, at V = 19.38 +/- 0.14 mag (Vega mag).
The afterglow magnitude was measured against six comparison stars from
the GSC 2.3 catalog.
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