Discovery certificate for object 2019qml
TNS Astronomical Transient Report No. 47331 [ 2019TNSTR1878....1G ]

Date Received (UTC): 2019-09-21 14:55:17
Sender: Mr. Mi Zhang
Source Group: XOSS

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

IAU Designation: AT 2019qml
Discoverer internal name: XM16MZ
Coordinates (J2000): RA = 01:33:52.710 (23.469625) DEC = +30:44:35.90 (30.743306)
Discovery date: 2019-09-20 14:46:07 (JD=2458747.1153588)

Potential host galaxy: M33

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 18.6) on severl 300-s survey images (limiting mag about 20.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Sep. 20.61536 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=01h33m52.71s +30d44'35".9 (equinox 2000.0). Which is about 23.4" east and 298.9" north of the center of the NGC598(M33). Nothing is visible at this position on archival images taken on May. 30.85649 UT(limiting mag 19.0).

Photometry

Discovery (first detection):
Discovery date: 2019-09-20 14:46:07
Flux: 18.6 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

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

Last non-detection:
Last non-detection date: 2019-05-30 20:33:21
Limiting flux: 19 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/2019qml