Discovery certificate for object 2020bmf
TNS Astronomical Transient Report No. 60690 [ 2020TNSTR.340....1G ]

Date Received (UTC): 2020-01-31 02:25:18
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 2020bmf
Discoverer internal name: XM25MZ
Coordinates (J2000): RA = 09:55:48.420 (148.95175) DEC = +69:07:32.50 (69.125694)
Discovery date: 2020-01-31 01:11:42.000 (JD=2458879.5497917)

Potential host galaxy: M81

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.8) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Jan. 31.00812 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=09h55m48.42s +69d07'32".5 (equinox 2000.0). Which is about 81.8" east and 217.4" north of the center of the M81. Nothing is visible at this position on archival images taken on Jan. 28.58455 UT(limiting mag 20.0). NET UCAC-4 XM25MZ C2020 01 31.00812 09 55 48.42 +69 07 32.5 19.8R C42 All images can be seen from: http://xjltp.china-vo.org/XM25MZ.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: 2020-01-31 01:11:42.000
Flux: 19.8 VegaMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Mi Zhang and Xing Gao, report the discovery of a possible nova (mag approximately 19.8) on several 300-s survey images (limiting mag about 21.0) taken by Xing Gao in Xingming Observatory Sky Survey(C42) around Jan. 31.00812 UT using a unfiltered CCD ( + 0.6-m f/8 Ritchey-Chretien telescope ). The transient approximately located at R.A.=09h55m48.42s +69d07'32".5 (equinox 2000.0). Which is about 81.8" east and 217.4" north of the center of the M81. Nothing is visible at this position on archival images taken on Jan. 28.58455 UT(limiting mag 20.0). NET UCAC-4 XM25MZ C2020 01 31.00812 09 55 48.42 +69 07 32.5 19.8R C42 All images can be seen from: http://xjltp.china-vo.org/XM25MZ.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: 2020-01-28 14:01:45
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/2020bmf