2016年1月15日晚,在本系统于24点放出的一批图片中,徐智坚、徐佳一、谭瀚杰三位同好各自独立上报了一个超新星候选目标,高级用户孙国佑经过查验确定为非常可疑,后经过及时补拍确认为未知目标,随上报TNS(国际天文联合会瞬变目标命名服务网),该目标在13日的PSP搜索中也有对应,这是本系统至目前为止发现的的最暗弱的超新星侯选体,报告如下:
POSSIBLE SUPERNOVA IN PGC 2707944
Zhijian Xu,Jiayi Xu,Hanjie Tan,Guoyou Sun and Xing Gao,report the discovery of a possible supernova (mag approximately 18.4) on one 40-s survey image (limiting mag about 19.0) taken by Xing Gao in Xingming Observation Sky Survey(C42) around Jan.15.65765 UT. using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The new object approximately located at R.A.=07h 16m 37s.42 Decl.=+67 53 31.4(equinox 2000.0). Which is about 40.4" west and 11.6" south of the center of the PGC 2707944. Nothing is visible at this position on archival images taken on Jan.13(limiting mag 19.0), or on the DSS(POSS-II Red) from Dec.21,1989(limiting mag about 19.5).
NET UCAC-A2.0
PSP16A C2016 01 15.65765 07 16 37.42 +67 53 31.4 18.4 V C42
All images can be seen from: http://www.xjltp.com/XOSS/PSP16A/PSP16A.htm
C42,Xingming Observatory,Mt. Nanshan. Observers Z.Xu,J.Xu,H.Tan,G.Sun,X.Gao,Measurers G.Sun 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.
当晚即联系云南天文台请求拍摄光谱验证,凌晨3点多拍得光谱初步判断为IIb类型超新星,因为信噪比不够高,第二晚又进行拍摄测量,后由张居甲及王晓峰先生发布在ATel上确认为IIb型超新星。本次合作非常顺利快速,PSP搜索模式经过近半年的磨合已经能高效得运作。