Discovery certificate for object 2019tdw
TNS Astronomical Transient Report No. 50021 [ 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: SN 2019tdw
Discoverer internal name: ZTF19achtewn
Coordinates (J2000): RA = 09:27:36.523 (141.9021812) DEC = +37:00:33.85 (37.0094031)
Discovery date: 2019-10-23 12:08:46 (JD=2458780.006088)

Potential host galaxy: WISEA J092736.27+370033.1
Host redshift: 0.096184

Remarks: Early SN candidate (g-rise > 0.09 mag/day) classified by ALeRCE using the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF19achtewn

Photometry

Discovery (first detection):
Discovery date: 2019-10-23 12:08:46
Flux: 19.1044 ABMag
Filter: g-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2019-10-20 12:08:10
Limiting flux: 19.5948 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/2019tdw