Discovery certificate for object 1989ag
TNS Astronomical Transient Report No. 46046 [ 2019TNSTR1731....1K ]

Date Received (UTC): 2019-09-04 11:16:53
Sender: Krisztian Klajnik
Reporting Group: None     Discovery Data Source: None

Krisztian Klajnik report/s the discovery of a new astronomical transient.

IAU Designation: AT 1989ag
Coordinates (J2000): RA = 22:09:09.790 (332.290792) DEC = +39:02:09.37 (39.035936)
Discovery date: 1989-09-04 05:47:00 (JD=2447773.7409722)

Potential host galaxy: AllWISE J220910.38+390212.7

Remarks: My discovered an possible supernovae in AllWISE J220910.38+390212.7 galaxy on the archived POSS plates. This object is catalogued than star in the USNO-B1.0 and GSC2.3 catalogs. Namely: USNO-B1.0 1290-0487186 and GSC2.3 N2X2046501 The object was apparent on 1989.09.04 and 1989.10.06 plates, it was not seen on 1953.09.08 and 1992.09.29 plates.

Photometry

Discovery (first detection):
Discovery date: 1989-09-04 05:47:00
Flux: 16.1 VegaMag
Filter: Other-
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Telescope= Samuel Oschin Filter= RG610 Plate= R The R-band apparent magnitude based on the reference stars: USNO-B1.0 1290-0487181, USNO-B1.0 1290-0487213, USNO-B1.0 1290-0487234

Last non-detection:
Last non-detection date: 1953-09-08 06:25:00
Limiting flux: 20 VegaMag
Filter: Other-
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Telescope= Samuel Oschin Filter= plexi Plate= R

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/1989ag