LIGO/Virgo G298936: GWFUNC/CNEOST optical observations and an optical transient
Abstract
We have performed tiled observations of LIGO/Virgo G298936 (LVC, GCN 21656) using the 1-m Chinese Near Earth Object Survey Telescope (CNEOST) at Xuyi, Jiangsu, China. CNEOST has a FOV of 3.0x3.0 deg^2, and carried out observations during 17:46:32 - 20:45:48 UT on 2017-08-23 in the Sloan i-filter. In total, 387 deg^2 is covered on the skymap with the highest localization probability in the north hemisphere. During the observations, the typical 5\sigma limit is ~19.8 mag. Preliminary analysis reveals an optical transient (OT), named as GWFUNC-17ure, at the coordinates RA (J2000) = 03:40:39.45 DEC (J2000) = +40:33:22.90 with m(i)~19.2 at 18:54:42 UT on 2017-08-23, apparently localized in its host galaxy SDSS J034039.45+403322.6 that has m(g)=20.32, m(r)=19.53, m(i)=19.14, as well as a PhotZ=0.12+/-0.04 (corresponding to D_L ~ 577 +/- 200 Mpc). Spectral observations of the above OT is encouraged.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- August 2017
- Bibcode:
- 2017GCN.21675....1X