VizieR Online Data Catalog: Rapidly evolving transients discovered by DES (Wiseman+, 2020)

Our sample of RETs comprises 106 events discovered in the 5-yr DES-SN transient survey. This number expands upon the 72 of Pursiainen et al. (2018MNRAS.481..894P, Cat. J/MNRAS/481/894) (P18). The first reason for the increased sample size is the use of the fifth year of DES-SN, as Pursiainen et al. (2018MNRAS.481..894P, Cat. J/MNRAS/481/894) were only able to make use of the first 4yr. By imposing the P18 selection criteria on season 5, the sample is increased to 92 objects. The second reason is an update to the sample selection technique, which adds a further 14 transients.

Of the 106 objects in the sample, 96 have a host galaxy detected in deep host galaxy photometry of Wiseman et al. (2020MNRAS.495.4040W) when using the directional light radius method (Sullivan et al. 2006ApJ...648..868S) to associate hosts as per Wiseman et al. (2020MNRAS.495.4040W). Of these, 49 have a host galaxy spectroscopic redshift which we access through an internal release of the OzDES Global Redshift Catalog (GRC; v.2020₀₁04). The full OzDES redshift catalogue will be available alongside the public data release detailed in Lidman et al. (2020MNRAS.496...19L).

We also obtained redshifts for some transient hosts serendipitously as part of the Looking at the Distant Universe with the MeerKAT Array (LADUMA) survey (http://www.laduma.uct.ac.za). Objects for which the host already had a publicly available redshift were not observed with OzDES, but merged into the GRC none the less. In total we analyse 45 spectra, with a mean continuum SNR of 2.56/pixel.

(3 data files).