An Improved Proper-Motion Catalog Combining USNO-B and the Sloan Digital Sky Survey
Abstract
An improved proper-motion catalog is presented, combining the USNO-B and Sloan Digital Sky Survey (SDSS) catalogs in the area of sky covered by SDSS Data Release I (DR1; 2099 deg2). USNO-B positions are recalibrated using SDSS galaxies, and proper motions are recomputed including both the USNO-B and SDSS positions. Statistical errors in the USNO-B proper motions are decreased by roughly 20%-30%, systematic errors are greatly reduced, and the proper motions are placed on an absolute reference frame. Requiring a match to an SDSS object removes the large number of false high proper motion objects in USNO-B. The resultant catalog is 90% complete to g less than 19.7, with statistical errors in the component proper motions of roughly 3- 3.5 mas yr(-1), substantially smaller systematic errors, and a contamination rate of less than 0.5%. A number of studies are currently underway using proper motions from this catalog. The catalog is available via ftp.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2004
- Accession Number
- ADA593816
Entities
People
- Blaise Canzian
- David G. Monet
- G. S. Hennessy
- Hugh C. Harris
- Jeffrey A. Munn
- Jeffrey R. Pier
- Robert B. Hindsley
- Robert H. Lupton
- Stephen E. Levine
- Zeljko Ivezic
Organizations
- United States Naval Observatory Flagstaff Station