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GCN Circular 23731

Subject
GRB 190114A: DOAO/LOAO optical observation
Date
2019-01-16T03:11:54Z (5 years ago)
From
Gregory SungHak Paek at SNU <shpaek@astro.snu.ac.kr>
Gregory S.H. Paek, Myungshin Im, Changsu Choi, Sophia Kim (CEOU/SNU),
Hyun-Il Sung (KASI), and Yuji Urata (NCU) on behalf of a larger
collaboration

We observed the afterglow of GRB 190114A(LaPorte et al., GCN 23677; Siegel
et al., GCN 23678; Evans et al., GCN 23679; de Ugarte Postigo et al., GCN
23680; Evans et al., 23681; Bolmer et al., GCN 23682; D'Avanzo et al., GCN
23683; Barthelmy et al., GCN 23685; de Ugarte Postigo et al., GCN 23687;
Selsing et al. GCN 23697) with the 1.0m telescope at the Deokheung Optical
Astronomy Observatory and the 1.0m telescope at the Lemonsan Optical
Astronomical Observatory.
The observation at the Deokheung Optical Astronomy Observatory started at
about 0.2 hours after the initial alert and the observation at the Lemonsan
Optical Astronomy Observatory started at about 24.7 hours after the initial
alert.
We did not find any positive signal at both observations and obtained
following preliminary 3 sigma upper limits.

obs         mjd         filter      exptime[sec]     ul[AB magtnitude]
DOAO        58497.642   R           60*10     >17.1
LOAO        58498.660   R           120*15    >20.3

The photometry is based on nearby APASS stars, Blaton transformation
(Blaton et al. 2007).

Further observations and analysis are being carried out.

[GCN OPS NOTE(15jan19):  The authors have corrected a mistake in the time delay
value; it should have been 12.3 hrs.  Please see Circ# 23738.]
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