AstroNote 2022-108

The Zwicky Transient Facility (ZTF; Bellm et al. 2019; Graham et al. 2019) Infant Supernova Science Program (Gal-Yam 2019) reports the early discovery and rapid follow-up of AT2022jzc (ZTF22aakdbia), following the methodology outlined by Gal-Yam et al. (2011).

The object was first detected on ZTF r-band images obtained on May 16, 2020 at 04:54 UT, about 2 days after the last non-detection, and was picked up by the Infant Supernovae custom Fritz (Skyportal) filter. The object was saved by a duty astronomer and rapid follow-up was triggered. The object was publicly announced by the ZTF_Bot via the TNS (TNS Discovery report)

An early spectrum obtained within two hours from the first detection, shows a blue continuum with broad H alpha lines and a line complex with potential He II and N V. Such spectrum points towards a young supernova. 

Assuming the redshift of the apparent host (z=0.0029 from NED) the SN was discovered around absolute magnitude M = -12.7. Swift photometry has been triggered and additional observations are ongoing.

We will continue to distribute alerts on such early SN detections via AstroNotes; additional follow-up observations of this transient are encouraged.

ZTF is a project led by PI S. R. Kulkarni at Caltech, and includes IPAC; WIS, Israel; OKC, Sweden; JSI/UMd, USA; UW,USA; DESY, Germany; NRC, Taiwan; UW Milwaukee, USA and LANL USA. ZTF acknowledges the generous support of the NSF under AST MSIP Grant No 1440341. Alert distribution service provided by DIRAC@UW. Alert filtering is being undertaken by the GROWTH marshal system (Kasliwal et al. 2019), supported by NSF PIRE grant 1545949.