GCN Circular 26431
Subject
LIGO/Virgo S191213g: Lulin Follow-up Observations of ZTF19acykzsk/AT2019wqj
Date
2019-12-15T02:17:28Z (5 years ago)
From
Albert Kong at NTHU <akhkong@gmail.com>
Han-Jie Tan (NCU), Albert Kong (NTHU), Chow-Choong Ngeow (NCU),
Wing-Huen Ip (NCU)
On behalf of the Global Relay of Observatories Watching Transients
Happen (GROWTH) collaborations
We report the photometric measurements of the Type II supernova
ZTF19acykzsk/AT2019wqj previously associated with the gravitational
wave event S191213g (GCN #26402, #26424) using the Lulin One-meter
Telescope (LOT) in Taiwan. The observations were conducted using g, r,
i filters starting at 2019-12-14 10:13:37 UT and were repeated 7 hours
later. Preliminary photometry was obtained by calibrating with the
APASS catalog.
Its r magnitude is slightly fainter than the observation by Andreoni
et al. (GCN #26424) ~14hr earlier and suggests a slow decay. We
confirm the report from Andreoni of a red color g-r=0.26.
Summary of ZTF19acykzsk/AT2019wqj :
UT JD Filter Exp(s) Mag (AB)
2019-12-14 10:16:07 2458831.928 g 300 19.37+/-0.10
2019-12-14 10:21:13 2458831.931 r 300 19.11+/-0.16
2019-12-14 10:26:20 2458831.935 i 300 19.10+/-0.11
2019-12-14 17:21:07 2458832.223 g 300*2 19.51+/-0.11
2019-12-14 17:32:47 2458832.231 r 300*2 19.10+/-0.14
2019-12-14 17:35:24 2458832.233 i 300 19.06+/-0.24
We would like to thank the staff in Lulin Observatory for helping the
observations.