An improved proper-motion catalog combining USNO-B and the sloan digital sky survey

Jeffrey A. Munn, David G. Monet, Stephen E. Levine, Blaise Canzian, Jeffrey R. Pier, Hugh C. Harris, Robert H. Lupton, Željko Ivezić, Robert B. Hindsley, G. S. Hennessy, Donald P. Schneider, J. Brinkmann

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215 Scopus citations

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 1 (DR1; 2099 deg 2). 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 < 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.

Original languageEnglish (US)
Pages (from-to)3034-3042
Number of pages9
JournalAstronomical Journal
Volume127
Issue number5 1781
DOIs
StatePublished - May 2004

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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