[vsnet-grb-info 20305] GRB 180205A optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Feb 7 19:52:54 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 22401
SUBJECT: GRB 180205A optical observations
DATE: 18/02/07 10:52:14 GMT
FROM: Arto Oksanen at Nyrola Obs., Finland <oksanen at nyrola.jklsirius.fi>
Arto Oksanen (Hankasalmi Obs., Hankasalmi, Finland) and D. Malesani (DARK/NBI)
report the following observations of GRB 180205A (Evans et al., GCN 22381):
A. Oksanen observed the location of GRB 180205A using the Hankasalmi
Observatory 0.4-m Richey-Chretien telescope with an SBIG STL-1001E
camera. Forty 60-second frames were obtained with clear filter
between 18:19 UT and 19:41 UT on 2018 February 5.
The afterglow is detected in co-added image.
Photometry of co-added image yields the following:
t-t0(d) m(CR) err(CR)
0.605 19.43 0.06
Photometry was performed using comparison stars from the Pan-STARRS survey
(Chambers et al. 2016; arXiv:1612.05560), after adopting the conversion
formulae by Lupton (2005).
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