Discovery certificate for object 2018akh
TNS Astronomical Transient Report No. 17447 [ 2018TNSTR.379....1X ]

Date Received (UTC): 2018-03-21 15:18:07
Sender: Mr. Zhijian Xu
Reporting Group: XOSS     Discovery Data Source: XOSS

Zhijian Xu, Xing Gao report/s the discovery of a new astronomical transient.

IAU Designation: AT 2018akh
Discoverer internal name: XMr3ZX
Coordinates (J2000): RA = 09:55:13.400 (148.805833) DEC = +69:00:47.80 (69.013278)
Discovery date: 2018-03-20 16:53:10 (JD=2458198.203588)

Potential host galaxy: M81

Remarks: Zhijian Xu and Xing Gao report the discovery of a possible nova in M81. The transient is approximately Mag. 21.2 on severl 300-s survey images (limiting mag about 21.7) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 20.70358 UT using a unfiltered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=09h55m13.40s +69d00'47".8 (equinox 2000.0). Which is about 106.0" west and 187.2" south of the center of the M81. Nothing is visible at this position on archival images taken on Mar 12.60063 (limiting mag 21.5). NET UCAC-4 XMr3ZX KC2018 03 20.70358 09 55 13.40 +69 00 47.8 21.2 V C42. All images can be seen from: http://www.xjltp.com/XOSS/XMr3ZX/XMr3ZX.htm.Xingming Observatory(C42) - NEXT, Mt. Nanshan, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

Photometry

Discovery (first detection):
Discovery date: 2018-03-20 16:53:10
Flux: 21.2 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: 0.6-m f/8 Ritchey-Chretien telescope + unfiltered CCD.

Last non-detection:
Last non-detection date: 2018-03-12 14:24:54
Limiting flux: 21.5 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: 0.6-m f/8 Ritchey-Chretien telescope + unfiltered CCD.

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2018akh