TITLE: GCN CIRCULAR NUMBER: 25045 SUBJECT: LIGO/Virgo S190707q: No counterpart candidates in the CNEOST DATE: 19/07/10 09:37:08 GMT FROM: Bin Li at PMO 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 conducted optical imaging observations for gravitational wave alert with Chinese Near Earth Object Survey Telescope (CNEOST) at Xuyi astronomical station in Jiangsu Province, China (32.75N, 118.47E). The information of observations and preliminary results are listed below. Alert: LIGO/Virgo S190707q (GCN #25012) StartTime (UT): 2019-07-07T14:30:29.332 EndTime (UT): 2019-07-07T17:12:21.366 Skycover (Square Degree): 198.0 Telescope FoV (Square Degree):9.0 #id CentRA(D) CentDEC(D) LimiteMag3_sig 5_sig 10_sig Filter 1 295.518646 12.638072 20.538 19.628 17.472 SR 2 302.074249 15.441651 20.117 19.195 17.793 SR 3 303.018616 23.824675 20.428 19.496 18.045 SR 4 296.229309 15.440425 20.432 19.553 17.442 SR 5 295.523468 9.841532 20.139 19.214 17.761 SR 6 302.947357 21.046049 20.395 19.519 17.841 SR 7 297.722321 18.228382 20.333 19.427 17.487 SR 8 298.410583 12.654563 20.465 19.569 17.799 SR 9 306.944336 26.635813 20.103 19.180 17.930 SR 10 299.982086 21.071682 20.213 19.303 17.683 SR 11 292.704681 9.866313 20.165 19.260 17.595 SR 12 291.308624 1.434427 20.275 19.376 17.833 SR 13 298.410583 12.654563 20.465 19.569 17.799 SR 14 307.681488 35.065994 20.517 19.602 18.295 SR 15 295.518646 12.638072 20.538 19.628 17.472 SR 16 296.229309 15.440425 20.432 19.553 17.442 SR 17 307.756287 32.263035 20.466 19.553 18.180 SR 18 288.488525 -1.320782 20.225 19.351 17.655 SR 19 293.371429 7.044422 20.466 19.519 17.637 SR 20 299.165894 15.453922 20.553 19.607 17.758 SR 21 303.018616 23.824675 20.428 19.496 18.045 SR 22 326.081604 51.804840 20.383 19.456 17.805 SR Detailed data analysis is still in progress and any interesting transients will be reported later. The more resulte will available at http://www.cneost.org/opem/list.php?gdate=2019-07-07