Discovery certificate for object 2020A
TNS Astronomical Transient Report No. 57410 [ 2020TNSTR...8....1P ]

Date Received (UTC): 2020-01-01 11:36:01
Sender: Dr. Ismael Perez-Fournon
Reporting Group: SGLF     Discovery Data Source: ZTF

I. Perez-Fournon, C. Jimenez Angel, F. Poidevin, R. Shirley (IAC & ULL), R. Marques-Chaves (CAB), S. Geier (GRANTECAN & IAC), Y. Shu (IoA), S. Rodney, J. Roberts-Pierel (Univ. of South Carolina), A. Bolton (NSF's OIR Lab), S. Chakrabarti, P. Craig, B. Alamiri (RIT), L. Alvarez-Hernandez (ULL), J. Bayer (ULL), A. Graña-Gonzalez (ULL), J. Kalies (ULL), A. J. Maas (ULL), A. Madrigal-Aguado (ULL), O. Maireles-Gonzalez (ULL), J. Orell-Miquel (ULL), B. Perez-Perez (ULL), F. Tinaut-Ruano (ULL & IAC), and I. V. Yanes-Rizo (ULL) report/s the discovery of a new astronomical transient.

IAU Designation: AT 2020A
Discoverer internal name: ZTF20aaaaexg
Coordinates (J2000): RA = 00:21:45.013 (5.437554) DEC = +32:37:39.59 (32.627664)
Discovery date: 2020-01-01 02:03:08.000 (JD=2458849.5855093)

Potential host galaxy: SDSS J002145.34+323738.3
Host redshift: 0.100534

Remarks: Data were provided by the Zwicky Transient Facility ( and processed through the Lasair, ALeRCE, ANTARES and MARS brokers.


Discovery (first detection):
Discovery date: 2020-01-01 02:03:08.000
Flux: 20.272 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Last non-detection:
Last non-detection date: 2019-12-29 02:42:01
Limiting flux: 20.417 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Details of the new object can be viewed here: