PSP项目首次河外新星发现以及2016年第二颗超新星

2017-10-11 03:33

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2016年2月7日，正值除夕辞旧迎新之时，PSP超新星巡天项目迎来了首次河外新星发现以及2016年第二颗超新星的发现，以此叩响了猴年的大门。

2月7日晚，尹强、薛皓辰、计成、廖家铭、张宓、王奥博、吕玉玺七位同好上报了M31中的可疑目标，经高级用户孙国佑查验确定是新星候选体，后立即补拍确认为未知目标，随即上报TOCP和TNS，报告如下：

POSSIBLE NOVA IN M31

Qiang Yin, Haochen Xue, Cheng Ji, Jiaming Liao, Mi Zhang, Aobo Wang, Yuxi Lv, Guoyou Sun and Xing Gao, report the discovery of a possible nova (mag approximately 18.1) on several 60s survey images (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Fer 07.56656 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356mm @f/6.9 ). the new object approximately located at R.A.=00h44m43s.49 Decl.=+41 53 40.1 (equinox 2000.0). Which is about 1344.0" east and 2251.6" north of the center of the NGC224 (M31). Nothing is visible at this position on archival images taken on Fer 06.5 (limiting mag 19.0) and on the DSS(POSS2/UKSTU Red) from Nov 27,1986(limiting mag about 19.8).

NET USNO-A2.0
PSP16B C2016 02 07.56656 00 44 43.49 +41 53 40.1 18.1 V C42

All images can be seen from: http://www.xjltp.com/XOSS/PSP16B/PSP16B.htm
C42 Xingming Observatory, Mt. Nanshan. Observers Q.Yin, H.Xue, C.Ji, J.Liao, M.Zhang, A.Wang, Y.Lv, G.Sun, X.Gao , Measurer G.Sun. 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.

2月10日，位于西班牙的英国利物浦约翰摩尔斯大学的2米远程望远镜拍摄对此目标拍摄了光谱，回复如下：

Spectroscopic classification of M31N 2016-02a (PNV J00444349+4153401) as a classical nova in M31

ATel #8661; M. J. Darnley (LJMU), S. C. Williams (Lancaster)

on 9 Feb 2016; 21:23 UT

Credential Certification: Matt Darnley (M.J.Darnley@ljmu.ac.uk)

Subjects: Optical, Nova, Transient We obtained a spectrum of nova candidate M31N 2016-02a (PNV J00444349+4153401; see CBAT TOCP) with the SPRAT spectrograph on the 2m Liverpool Telescope (Steele et al. 2004) on 2016 February 09.85 UT.The spectrum only shows Hα and Hβ emission lines (Hγ is tentatively detected, Hδ is not). We measure the FWHM of the Hα line to be 3600 ± 100 km/s, with Hβ having a FWHM of 2800 ± 300 km/s. Both these Balmer lines are asymmetric, showing higher velocities on the red-side of their profiles.This spectrum confirms that M31N 2016-02a is a classical nova eruption in M31.

R. E. Rutledge, Editor-in-ChiefDerek Fox, EditorMansi M. Kasliwal, Co-Editor

这是PSP项目启动以来第一次河外新星的发现，以下是发现时的图片：

2月7日早晨，李昂、郭栩、计成三位同好上报了一颗疑似目标，经高级用户孙霈源查验后确定是疑似超新星候选体，晚上补拍因照片质量不高无法确认。2月8日晚上，位于西安的同好田彬用自己的远程天文台协助补拍，最终确定为未知目标，2月9日早晨上报到CBAT和TNS，报告如下：

POSSIBLE SUPERNOVA IN IC 1267

Ang Li, Xu Guo, Cheng Ji, Peiyuan Sun and Xing Gao, report the discovery of a possible supernova (mag approximately 17.1) on one 40-s survey image (limiting mag about 19.0) taken by Xing Gao in Xingming Observation Sky Survey (C42) around Feb.06.96678 UT. Using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9). The new object approximately located at R.A.=17h 38m 46s.61 Decl.=+59 22 22.4(equinox 2000.0). Which is about 0.7" east and 0.9" south of the center of the IC 1267.

Nothing is visible at this position on archival images taken on May.27,2015 (limiting mag 19.0), or on the DSS (POSS-II IR) from Jun.19,1992 (limiting mag about 19.0).

Bin Tian's private observatory follow-up the possible supernova (mag approximately 16.5) on one 300-s image (limiting mag about 18.0) around Feb.08.83472 UT. Using a CCD + Sharpstar AL-130 Refracting telescope D=130-mm @f/6.67.

NET UCAC-A2.0
PSP16C C2016 02 06.96678 17 38 46.61 +59 22 22.4 17.1 V C42

All images can be seen from: http://www.xjltp.com/XOSS/PSP16C/PSP16C.htm

C42,Xingming Observatory,Mt. Nanshan. Observers A.Li,X.Guo,C.Ji,P.Sun,X.Gao,Measurer P.Sun 0.36-m f/6.9 Schmidt-Cassegrain telescope and CCD.

以下是发现时的图片：（正在等待光谱确认超新星类型）