Discovery certificate for object 2017hle
TNS Astronomical Transient Report No. 14180 [ 2017TNSTR1137....1W ]

Date Received (UTC): 2017-10-18 18:33:45
Sender: Mr. Hanjie Tan
Source Group: XOSS

Xiaobing Wang, Ziyi Zhao, Jiangao Ruan, Xing Gao report/s the discovery of a new astronomical transient.

IAU Designation: SN 2017hle
Discoverer internal name: PSP17E
Coordinates (J2000): RA = 01:07:33.060 (16.88775) DEC = +32:24:30.00 (32.408333)
Discovery date: 2017-10-18 16:25:32 (JD=2458045.1843981)

Potential host galaxy: NGC 383
Host redshift: 0.017005

Remarks: POSSIBLE SUPERNOVA IN NGC 383 Xiaobing Wang, Ziyi Zhao, Jiangao Ruan and Xing Gao report the discovery of a possible supernova in NGC 383. The transient (mag approximately 18.0) on one 40-s survey image (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Oct. 18.68440, 2017, using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ). The new object approximately located at R.A.=01h07m33.06s +32d24'30".0 (equinox 2000.0).Which is about 102.6" east and 15.2" south of the center of the NGC 383. Nothing is visible at this position on an archival image taken on Sep 22.75464, 2017 (limiting mag 19.5). All images can be seen from: http://www.xjltp.com/XOSS/PSP17E/PSP17E.htm NET USNO-B1.0 PSP17E C2017 10 18.68440 01 07 33.06 +32 24 30.0 18.0 V C42

Photometry

Discovery (first detection):
Discovery date: 2017-10-18 16:25:32
Flux: 18 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: The transient (mag approximately 18.0) on one 40-s survey image (limiting mag about 19.5) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Oct. 18.68440, 2017, using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ).

Last non-detection:
Last non-detection date: 2017-09-22 18:06:41
Limiting flux: 19.5 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Nothing is visible at this position on an archival image taken on Sep 22.75464, 2017 (limiting mag 19.5), taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Oct. 18.68440, 2017, using an unfiltered CCD ( + Celestron C14 Schmidt-Cassegrain telescope D=356-mm @f/6.9 ).

Archival info: DSS

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