The CatWISE Preliminary Catalog: Motions from ${\it WISE}$ and ${\it NEOWISE}$ Data

Understand

CatWISE is a program to catalog sources selected from combined ${\it WISE}$ and ${\it NEOWISE}$ all-sky survey data at 3.4 and 4.6 $\mu$m (W1 and W2).

• The CatWISE Preliminary Catalog consists of 900,849,014 sources measured in data collected from 2010 to 2016.
• This dataset represents four times as many exposures and spans over ten times as large a time baseline as that used for the AllWISE Catalog.
• CatWISE adapts AllWISE software to measure the sources in coadded images created from six-month subsets of these data, each representing one coverage of the inertial sky, or epoch.