GCN Circular 24647
Subject
LIGO/Virgo S190521r: One optical transient from CNEOST
Date
2019-05-22T02:11:08Z (5 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Bin Li, Hai-bin Zhao (PMO), Dong Xu, Zi-pei Zhu, Bang-Yao Yu,Tian-meng
Zhang, Xu Zhou, Chen-zhou Cui, Hui-juan Wang (NAOC), Xue-feng Wu,
Zhi-ping Jin, Tian-rui Sun, Hao Lu, Ge-tu Zhaori, Ren-quan Hong,
Long-fei Hu (PMO), Xiao-feng Wang, Wen-xiong Li (THU), Li-fan Wang
(PMO/TAMU), Jin-zhong Liu (XAO), Ji-rong Mao, Jin-ming Bai (YNAO),
report on behalf of the CNEOST collaboration
We performed the search for the optical counterpart of LIGO/Virgo
S190521r (LVC, GCN 24632) with the Chinese Near Earth Object Survey
Telescope (CNEOST) at Xuyi, Jiangsu, China. The 3 x 3 deg^2 imager
scanned high probability regions of the LVC localization that are
accessible to CNEOST. Statistical results on the search will be reported
later, and here we report an optical transient.
The OT is localised at coordinates:
R.A. (J2000) = 17:19:41.85
Dec. (J2000) = +01:04:45.19
with an uncertainty of ~ 0.5 arcsec. The OT had m(VR) ~ 17.8 mag at
15:48:04 UT on 2019-05-21, and appeared at the above position in three
images with time interval of ~ 40 mins. At the above position, there
exists a very low S/N object in the PanSTARRS and SDSS surveys. The
object had m(r) ~ 23.3 mag, and seems extended to some extent.
Verification of the OT is encouraged.