GCN Circular 26478

D. Xu, Z.P. Zhu, H.J. Wang, L. Ge, T.M. Zhang, X. Zhou, C.Z. Cui, Y.F. 
Xu (NAOC), X. Zhang, J.Z. Liu (XAO), H.B. Zhao, B. Li (PMO), J.R. Mao 
(YNAO), X. Gao (Urumqi No.1 Senior High School) report on behalf of the 
GWFUNC collaboration:

We observed the localization regions of the LIGO/Virgo gravitational 
wave trigger S191216ap (GCN #26454), the IceCube neutrino counterpart 
candidate (GCN #26460), and the HAWC gamma-ray counterpart candidate 
(GCN #26472), using the Nanshan 1-meter telescope with the FOV of 
1.3x1.3 deg^2. Observations started at 11:57:05 UT and ended at 15:19:31 
UT on 2019-12-17.

Our survey area covers No.1 (ra: 323.124298, dec: 5.346313) and No.4 
(ra: 323.298126, dec: 4.682521) GLADE galaxies, reported in Kumar et al. 
(GCN #26476). No 1. galaxy has m(r) ~ 15.67 mag in our image, being 
consistent with m(r) = 15.60 mag in SDSS. No. 4 galaxy has m(r) ~ 17.02 
mag in our image, being consistent with m(r) = 16.99 mag in SDSS. Any 
significant optical transient within these two galaxies can be ruled out.

Full data analysis of the searching is ongoing.