Discovery certificate for object 2021bfs
TNS Astronomical Transient Report No. 97840 [ 2021TNSTR.247....1B ]

Date Received (UTC): 2021-01-26 20:55:16
Sender: Mr. Raffaele Belligoli
Reporting Group: ISSP     Discovery Data Source: ISSP

Raffaele Belligoli report/s the discovery of a new astronomical transient.

IAU Designation: AT 2021bfs
Discoverer internal name: PNV-OMB15
Coordinates (J2000): RA = 00:42:52.200 (10.7175) DEC = +41:16:24.60 (41.2735)
Discovery date: 2021-01-26 17:16:48.000 (JD=2459241.22)

Potential host galaxy: M31

Remarks: OMB extragalactic nova monitoring with ISSP collaboration reports the discovery of a probable nova in M31 by F.Castellani, R.Belligoli and C.Marangoni. The transient designated also PNV J00425220+4116246

Photometry

Discovery (first detection):
Discovery date: 2021-01-26 17:16:48.000
Flux: 17.6 STMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: New transient was clearly detected on '2021-01-26.7209' UT using 16 x 300s frames (4800s total) obtained by a Moravian G4-9000 KAF unfiltered CCD with the 0.4m f.8 Ritchey-Chrétien telescope from Monte Baldo "A.Gelodi" Astronomic Observatory, località Novezzina, Ferrara di Monte Baldo, Verona, Italy. The discovery magnitude is 17.6±0.5 mag in the CV band (clear visual). We will continue to monitor the nova light curve and strongly encourage additional follow-up observations.

Last non-detection:
Last non-detection date: 2021-01-24 18:54:43
Limiting flux: 19 STMag
Filter: Clear-
Instrument: Other
Telescope: Other

Remarks: Last non-detected image on '2021-01-24.78888' UT using 16x 300s frames (4800s total) was obtained by a Moravian G4-9000 KAF unfiltered CCD with the 0.4m f.8 Ritchey-Chrétien

Archival info: DSS
Remarks: No stellar source is visible at the transient's position in our past images and ALADIN sky atlas. No variable star is present at these coordinates on the SIMBAD database.

Details of the new object can be viewed here: https://www.wis-tns.org/object/2021bfs