A Deep Proper Motion Catalog Within The Sloan Digital Sky Survey Footprint

TL;DR

This paper introduces a new proper motion catalog combining SDSS data with second epoch observations, covering over 3,000 square degrees with improved accuracy, providing valuable data for stellar and galactic studies.

Contribution

The paper presents a comprehensive proper motion catalog within the SDSS footprint using new observations, enhancing positional accuracy and coverage over previous datasets.

Findings

Proper motion errors range from 5 to 15 mas/year.

Systematic errors are approximately 1-4 mas/year depending on the instrument.

The catalog covers over 3,000 square degrees with second epoch photometry.

Abstract

A new proper motion catalog is presented, combining the Sloan Digital Sky Survey (SDSS) with second epoch observations in the r band within a portion of the SDSS imaging footprint. The new observations were obtained with the 90prime camera on the Steward Observatory Bok 90 inch telescope, and the Array Camera on the U.S. Naval Observatory, Flagstaff Station, 1.3 meter telescope. The catalog covers 1098 square degrees to r = 22.0, an additional 1521 square degrees to r = 20.9, plus a further 488 square degrees of lesser quality data. Statistical errors in the proper motions range from 5 mas/year at the bright end to 15 mas/year at the faint end, for a typical epoch difference of 6 years. Systematic errors are estimated to be roughly 1 mas/year for the Array Camera data, and as much as 2 - 4 mas/year for the 90prime data (though typically less). The catalog also includes a second epoch of r band photometry.