Discovery certificate for object 2020enc
TNS Astronomical Transient Report No. 64548 [ 2020TNSTR.807....1G ]

Date Received (UTC): 2020-03-16 19:06:05
Sender: Mr. Mi Zhang
Reporting Group: XOSS     Discovery Data Source: XOSS

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

IAU Designation: AT 2020enc
Discoverer internal name: XM28MZ
Coordinates (J2000): RA = 09:55:32.630 (148.885958) DEC = +69:40:47.20 (69.679778)
Discovery date: 2020-03-16 17:57:33.000 (JD=2458925.2482986)

Potential host galaxy: M82

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.9) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 16.74830 UT using a r'(Sloan) filtered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=09h55m32.63s +69d40'47".2 (equinox 2000.0). Which is about 103.2" west and 0.3" north of the center of the M82. Nothing is visible at this position on archival images taken on Mar. 14.61644 UT(limiting mag 20.5). NET UCAC-4 XM28MZ C2020 03 16.74830 09 55 32.63 +69 40 47.2 19.9r C42 All images can be seen from: http://xjltp.china-vo.org/XM28MZ.html. 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: 2020-03-16 17:57:33.000
Flux: 19.9 VegaMag
Filter: r-Sloan
Instrument: Other
Telescope: Other

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.9) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Mar. 16.74830 UT using a r'(Sloan) filtered CCD (+ 0.6-m f/8 Ritchey-Chretien telescope). The transient approximately located at R.A.=09h55m32.63s +69d40'47".2 (equinox 2000.0). Which is about 103.2" west and 0.3" north of the center of the M82. Nothing is visible at this position on archival images taken on Mar. 14.61644 UT(limiting mag 20.5). NET UCAC-4 XM28MZ C2020 03 16.74830 09 55 32.63 +69 40 47.2 19.9r C42 All images can be seen from: http://xjltp.china-vo.org/XM28MZ.html. C42,Xingming Observatory - NEXT, Mt. Nanshan. Observers M.Zhang,X.Gao,Measurers M.Zhang, 0.6-m f/8 Ritchey-Chretien telescope and CCD.

Last non-detection:
Last non-detection date: 2020-03-14 14:47:40
Limiting flux: 20.5 VegaMag
Filter: r-Sloan
Instrument: Other
Telescope: Other

Remarks: using a r'(Sloan) filtered 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/2020enc