Document-27758
On the Choice of LSST Flux Units
Abstract
A linear measure of flux is preferred for LSST catalogs. This document provides technical details about this preference in support of the LSST Project Science Team’s decision to adopt nano-jansky (1 nJy =10−35 Wm−2Hz−1) as the standard LSST flux unit. Difficulties associated with homogenizing broad-band flux measurements to a uniform system are also discussed in some detail.