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
收藏
页码：3034 / 3042
页数：9
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