Discovery certificate for object 2019gap
TNS Astronomical Transient Report No. 35907 [ 2019TNSTR.867....1G ]

Date Received (UTC): 2019-05-28 23:17:52
Sender: Mr. Mi Zhang
Source Group: XOSS

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

IAU Designation: AT 2019gap
Discoverer internal name: XM12MZ
Coordinates (J2000): RA = 00:43:20.580 (10.83575) DEC = +41:25:42.60 (41.4285)
Discovery date: 2019-05-28 21:23:13 (JD=2458632.3911227)

Potential host galaxy: M31

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 17.4) on severl 300-s survey images (limiting mag about 18.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around May. 28.89112 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h43m20.58s +41d25'42".6 (equinox 2000.0). Which is about 408.8" east and 574.1" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on May. 24.82138 UT(limiting mag 20.0).

Photometry

Discovery (first detection):
Discovery date: 2019-05-28 21:23:13
Flux: 17.4 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 17.4) on severl 300-s survey images (limiting mag about 18.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around May. 28.89112 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=00h43m20.58s +41d25'42".6 (equinox 2000.0). Which is about 408.8" east and 574.1" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on May. 24.82138 UT(limiting mag 20.0).

Last non-detection:
Last non-detection date: 2019-05-24 19:42:47
Limiting flux: 20 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ).

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2019gap