Discovery certificate for object 2021dff
TNS Astronomical Transient Report No. 99853 [ 2021TNSTR.503....1F ]

Date Received (UTC): 2021-02-18 20:05:04
Sender: ZTF (ALeRCE)
Reporting Group: ALeRCE     Discovery Data Source: ZTF

F. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, L. Hernandez-Garcia, L. Galbany, E. Camacho, J. Silva-Farfan, A. Mourao, 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, 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 2021dff
Discoverer internal name: ZTF21aaldqxj
Coordinates (J2000): RA = 04:44:59.854 (71.24939035) DEC = -19:52:41.19 (-19.8781083)
Discovery date: 2021-02-17 03:28:12.999 (JD=2459262.6445949)

Potential host galaxy: APMUKS(BJ) B044249.15-195809.1

Remarks: Early SN candidate (g-rise > 0.22+-0.04 mag/day, r-rise > 0.15+-0.03 mag/day) classified using ALeRCE's stamp classifier - see http://arxiv.org/abs/2008.03309 - and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF21aaldqxj

Photometry

Discovery (first detection):
Discovery date: 2021-02-17 03:28:12.999
Flux: 19.5503 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2021-02-12 05:50:41
Limiting flux: 20.2785 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://www.wis-tns.org/object/2021dff