ZTF SN Ia DR2: Overview

Understand

We present the first homogeneous release of several thousand Type Ia supernovae (SNe Ia), all having spectroscopic classification, and spectroscopic redshifts for half the sample.

• This release, named the &#34;DR2&#34;, contains 3628 nearby (z < 0.3) SNe Ia discovered, followed and classified by the Zwicky Transient Facility survey between March 2018 and December 2020.
• Of these, 3000 have good-to-excellent sampling and 2667 pass standard cosmology light-curve quality cuts.
• This release is thus the largest SN Ia release to date, increasing by an order of magnitude the number of well characterized low-redshift objects.