The Hyper Suprime-Cam SSP Transient Survey in COSMOS: Overview

Understand

We present an overview of a deep transient survey of the COSMOS field with the Subaru Hyper Suprime-Cam (HSC).

• The survey was performed for the 1.77 deg$^2$ ultra-deep layer and 5.78 deg$^2$ deep layer in the Subaru Strategic Program over 6- and 4-month periods from 2016 to 2017, respectively.
• The ultra-deep layer shows a median depth per epoch of 26.4, 26.3, 26.0, 25.6, and 24.6 mag in $g$, $r$, $i$, $z$, and $y$ bands, respectively; the deep layer is $\sim0.6$ mag shallower.
• In total, 1,824 supernova candidates were identified.