Discovery certificate for object 2021I
TNS Astronomical Transient Report No. 95257 [ 2021TNSTR...1....1F ]

Date Received (UTC): 2021-01-01 16:43:48
Sender: ZTF (ALeRCE)
Reporting Group: ALeRCE     Discovery Data Source: ZTF

F. Forster, F.E. Bauer, A. Munoz-Arancibia, G. Pignata, L. Hernandez-Garcia, L. Galbany, G. Pignata, 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 2021I
Discoverer internal name: ZTF21aaabucc
Coordinates (J2000): RA = 14:35:52.992 (218.97080195) DEC = +54:35:37.17 (54.593659275)
Discovery date: 2021-01-01 11:22:28.001 (JD=2459215.9739352)

Potential host galaxy: SDSS J143553.17+543537.4
Host redshift: 0.257

Remarks: Early SN candidate (g-rise > 0.15+-0.01 mag/day, r-rise > 0.16+-0.01 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/ZTF21aaabucc

Photometry

Discovery (first detection):
Discovery date: 2021-01-01 11:22:28.001
Flux: 18.7347 ABMag
Filter: r-ZTF
Instrument: ZTF-Cam
Telescope: Palomar 1.2m Oschin

Remarks: Data provided by ZTF

Last non-detection:
Last non-detection date: 2020-12-23 11:50:19
Limiting flux: 17.969 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/2021I