Discovery certificate for object 2017gjn
TNS Astronomical Transient Report No. 13303 [ 2017TNSTR.935....1L ]

Date Received (UTC): 2017-08-30 03:25:32
Sender: Mr. Zhijian Xu
Reporting Group: XOSS     Discovery Data Source: XOSS

Yanxi Li, Haochen Xue, Jingyuan Zhao, Mi Zhang, Xianyi Hu, Xiaobing Wang, Jiangao Ruan, Xing Gao report/s the discovery of a new astronomical transient.

IAU Designation: SN 2017gjn
Discoverer internal name: PSP17A
Coordinates (J2000): RA = 02:43:48.410 (40.951708) DEC = +32:31:33.70 (32.526028)
Discovery date: 2017-08-29 20:38:17 (JD=2457995.359919)

Potential host galaxy: NGC 1067

Remarks: Yanxi Li, Haochen Xue, Jingyuan Zhao, Mi Zhang, Xianyi Hu, Xiaobing Wang, Jiangao Ruan and Xing Gao report the discovery of a possible supernova in NGC 1067. The transient (mag approximately 15.4) on one 40-s survey image (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Aug. 29.85969, 2017 UT using a unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The new object approximately located at R.A.=02h43m48.41s +32d31'33".7 (equinox 2000.0). Which is about 26.7" west and 51.2" north of the center of the NGC1067. Nothing is visible at this position on archival image taken on Sep 29.93943, 2016 (limiting mag 19.3). All images can be seen from: http://www.xjltp.com/XOSS/PSP17A/PSP17A.htm.

Photometry

Discovery (first detection):
Discovery date: 2017-08-29 20:38:17
Flux: 15.4 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Using a unfiltered CCD + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9.

Last non-detection:
Last non-detection date: 2016-09-29 22:32:47
Limiting flux: 19.3 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Using a unfiltered CCD + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9.

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2017gjn