A Global Correction to PPMXL Proper Motions

Abstract

In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic objects and fit their reported PPMXL proper motions to an ensemble of spherical harmonics in magnitude shells. A magnitude dependent proper motion correction is thus constructed. This correction is applied to a set of fundamental radio sources, quasars, and is compared to similar corrections to assess its utility. We publish, along with this paper, code which may be used to correct proper motions in the PPMXL catalog over the full sky which have 2 Micron All Sky Survey photometry.

arXiv comment9 pages, 8 figures, accepted to AJ

References in corpus (21)

• Astropy: A Community Python Package for Astronomy
• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• The USNO-B Catalog
• The Sloan Digital Sky Survey Photometric Camera
• The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
• GAIA: Composition, Formation and Evolution of the Galaxy
• Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
• The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and 2MASS
• Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue
• PPM-Extended (PPMX) - a catalogue of positions and proper motions
• HST/WFPC2 proper motions in two bulge fields: kinematics and stellar population of the Galactic bulge
• The SDSS-2MASS-WISE Ten Dimensional Stellar Color Locus
• Star-galaxy separation strategies for WISE-2MASS all-sky infrared galaxy catalogs
• Space Velocities of Southern Globular Clusters VII. NGC 6397, NGC 6626 (M 28) and NGC 6656 (M 22)
• The UKIDSS-2MASS Proper Motion Survey I: Ultracool dwarfs from UKIDSS DR4
• Sagittarius stream 3-d kinematics from SDSS Stripe 82
• Independent determination of the systematic and random errors of the proper motions in the PPMXL catalog using quasars
• A Stellar Population Synthesis Model for the Study of Ultraviolet Star Counts of the Galaxy
• Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources

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• Is the Milky Way still breathing? RAVE-Gaia streaming motions
• A Gaia-PS1-SDSS (GPS1) Proper Motion Catalog Covering 3/4 of the Sky
• Chemical separation of disc components using RAVE
• Observing the products of stellar evolution in the old open cluster M67 with APOGEE
• Quasar Lenses and Galactic Streams: Outlier Selection and GAIA Multiplet Detection
• A Map of the Local Velocity Substructure in the Milky Way Disk
• Close encounters involving RAVE stars beyond the 47 Tucanae tidal radius
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• The Lives of Stars: Insights From the TGAS-RAVE-LAMOST Dataset