Discovery certificate for object 2018ajt
TNS Astronomical Transient Report No. 17430 [ 2018TNSTR.378....1Z ]

Date Received (UTC): 2018-03-21 14:10:19
Sender: Mr. Zhijian Xu
Source Group: XOSS

Mi Zhang, Xing Gao report/s the discovery of a new astronomical transient.

IAU Designation: AT 2018ajt
Discoverer internal name: XM03MZ
Coordinates (J2000): RA = 00:42:40.410 (10.668375) DEC = +41:12:52.20 (41.2145)
Discovery date: 2018-03-21 13:41:22 (JD=2458199.0703935)

Potential host galaxy: M31

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 18.1) on severl 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 22.57039 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=00h42m40.41s +41d12'52".2 (equinox 2000.0). Which is about 977.8" east and 258.8" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on Mar. 12.56498 UT(limiting mag 20.5). NET UCAC-4 XM03MZ C2018 03 21.57039 00 42 40.41 +41 12 52.2 18.1 V C42,All images can be seen from: http://www.xjltp.com/XOSS/XM03MZ/XM03MZ.htm , C42,Xingming Observatory - NEXT, Mt. Nanshan. Observers M.Zhang,X.Gao,Measurers M.Zhang, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

Photometry

Discovery (first detection):
Discovery date: 2018-03-21 13:41:22
Flux: 18.1 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 13:33:34
Limiting flux: 20.5 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/2018ajt