TITLE: GCN CIRCULAR NUMBER: 19193 SUBJECT: LIGO/Virgo G194575: EWE for NOWT follow-up of northern sky DATE: 16/03/15 14:00:26 GMT FROM: Jinzhong Liu at Xinjiang Astronomical Observatory Zhang, Yu (XAO); Zhang, Xuan (XAO); Niu, Hubiao (XAO); Pu, guangxin (XAO); Ma, shuguo (XAO); Yang, taozhi (XAO); Song, fangfang(XAO) Liu Jinzhong (XAO), on behalf of the NOWT group report: We followed up the GraceDB event (event ID: G194575) with Nanshan One-meter Wide field Telescope (NOWT) from Xinjiang Astronomical observatory (XAO). The first observation was observed at 10/29/2015, GMT 19/15/51. The first observation reached an exposure time of 120 seconds with V band and approached a limiting magnitude of 20.3 magnitude. 40 of *.fit files of this field were obtained and the time of duration was 1680 s. We only report the first observation here, more information will be reported later. We monitored the sky region constantly since the event, and we anticipated to continue the observation. We observed the range (just about FOV of 15 sqr deg due to very small possibility-map at northern sky) and here reported a non-detection of EM-trigger with a time span of 2.48 h with limiting magnitude of 20.3 ========================= Detailed information about the observation is listed below RA DEC EXP UTC number total(s) limit_mag filter 01:59:59.07 +15:31:46.6 120s 20151029191551 40 1680 20.3 V 01:59:59.07 +14:13:46.6 12s 20151029192409 36 1500 15.3 V 01:59:59.07 +12:55:46.6 30s 20151029193227 30 1260 16.7 V 01:59:59.07 +11:37:46.6 30s 20151029194044 30 1260 17.1 V 01:59:59.07 +10:19:46.6 12s 20151029194902 30 1260 15.0 V 01:59:59.07 +09:01:46.6 12s 20151029195720 30 1260 15.0 V 00:54:24.3 +00:39:59.0 40s, 20151217131620 6 360 17.8 V 01:54:38.0 +00:43:00 35s 20160122125821 10 360 15.6 V -- N: Jinzhong Liu, PhD O: Main building, 213 P: 150, Science 1-Street, Urumqi, Xinjiang 830011, China T: 86 991 3689027 D: 2012-07-14 E: optics@xao.ac.cn