An improved proper-motion catalog combining USNO-B and the Sloan Digital Sky Survey

被引：230

作者：

Munn, JA

Monet, DG

Levine, SE

Canzian, B

Pier, JR

Harris, HC

Lupton, RH

Ivezic, Z

Hindsley, RB

Hennessy, GS

Schneider, DP

Brinkmann, J

机构：

[1] USN Observ, Flagstaff Stn, Flagstaff, AZ 86002 USA

[2] Princeton Univ Observ, Princeton, NJ 08544 USA

[3] USN, Res Lab, Remote Sensing Div, Washington, DC 20375 USA

[4] USN Observ, Washington, DC 20392 USA

[5] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

[6] Apache Point Observ, Sunspot, NM 88349 USA

来源：

ASTRONOMICAL JOURNAL | 2004年 / 127卷 / 05期

关键词：

astrometry; catalogs;

D O I：

10.1086/383292

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：3034 / 3042

页数：9

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