Discovery certificate for object 2019tbk
TNS Astronomical Transient Report No. 49918 [ 2019TNSTR2154....1F ]

Date Received (UTC): 2019-10-23 09:20:55
Sender: ZTF (ALeRCE)
Reporting Group: ALeRCE     Discovery Data Source: ZTF

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 2019tbk
Discoverer internal name: ZTF19acgwhuz
Coordinates (J2000): RA = 04:14:13.440 (63.5559998) DEC = +05:36:13.42 (5.6037285)
Discovery date: 2019-10-22 09:03:32.000 (JD=2458778.8774537)

Potential host galaxy: SDSS J041413.45+053612.1
Host redshift: 0.102

Remarks: Early SN candidate (r-rise > 0.03 mag/day) classified by ALeRCE using the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF19acgwhuz

Photometry

Discovery (first detection):
Discovery date: 2019-10-22 09:03:32.000
Flux: 19.7299 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2019-10-19 08:57:58
Limiting flux: 19.8941 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/2019tbk