Discovery certificate for object 2019tdn
TNS Astronomical Transient Report No. 50011 [ 2019TNSTR2154....1F ]

Date Received (UTC): 2019-10-23 16:03:53
Sender: ZTF (ALeRCE)
Source Group: ALeRCE

F. Forster, G. Pignata, J. Arredondo, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, E. Reyes, I. Reyes, P. Sanchez-Saez, C. Valenzuela, E. Castillo, D. Ruz-Mieres, D. Rodriguez-Mancini, F.E. Bauer, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker report/s the discovery of a new astronomical transient.

IAU Designation: AT 2019tdn
Discoverer internal name: ZTF19acgcdzj
Coordinates (J2000): RA = 02:27:19.953 (36.833139) DEC = +10:42:15.49 (10.7043018)
Discovery date: 2019-10-23 07:34:28 (JD=2458779.8156019)

Potential host galaxy: WISEA J022719.90+104215.5

Remarks: Early SN candidate (r-rise > 0.02 mag/day) classified by ALeRCE using the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF19acgcdzj

Photometry

Discovery (first detection):
Discovery date: 2019-10-23 07:34:28
Flux: 19.8559 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2019-10-17 08:01:28
Limiting flux: 19.5696 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Details of the new object can be viewed here: https://wis-tns.weizmann.ac.il/object/2019tdn