/ftp/cats/I/317



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I/317               The PPMXL Catalog                   (Roeser+ 2010)
The following files can be converted to FITS (extension .fit or fit.gz)
	sample.out dat/*
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/317
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drwxr-xr-x 317 cats archive 8192 Feb 28 11:16 [Up] drwxr-xr-x 6 cats archive 4096 Jan 13 2023 [TAR file] -rw-r--r-- 1 cats archive 456 Dec 19 2022 .message -rw-r--r-- 1 cats archive 31232 Jan 31 2018 ReadMe -rw-r--r-- 1 cats archive 31256 Oct 31 2014 ReadMe.ori -rw-r--r-- 1 cats archive 1005 Feb 2 2018 +footg5.gif -rw-r--r-- 1 cats archive 8670 Feb 2 2018 +footg5.png -rw-r--r-- 1 cats archive 2978 Feb 2 2018 +footg8.gif -rw-r--r-- 1 cats archive 127000 Feb 2 2018 +footg8.png drwxr-xr-x 2 cats archive 20480 Jun 6 2011 dat -rw-r--r-- 1 cats archive 249 Mar 25 2011 dic1317.tst -r--r--r-- 1 cats archive 930 Jul 11 2010 ppmxl_fl.htx -r--r--r-- 1 cats archive 5533 Jul 6 2010 sample.out.gz [Uncompressed] -rw-r--r-- 1 cats archive 28800 Aug 22 2022 tab_1317_1_I_317_sample.moc.fits
Beginning of ReadMe : I/317 The PPMXL Catalog (Roeser+ 2010) ================================================================================ The PPMXL catalog of positions and proper motions on the ICRS. Combining USNO-B1.0 and the two Micron All Sky Survey (2MASS). Roeeser S., Demleitner M., Schilbach E. <Astron. J. 139, 2440 (2010)> =2010AJ....139.2440R ================================================================================ ADC_Keywords: Surveys ; Positional data ; Proper motions ; Photometry, photographic ; Photometry, infrared Keywords: astrometry ; proper motions ; catalogs ; Galaxy: kinematics and dynamics Abstract: USNO-B1.0 (Cat. I/284) and 2MASS (Cat. II/246) are the most widely used full-sky surveys. However, 2MASS has no proper motions at all, and USNO-B1.0 published only relative, not absolute (i.e. on ICRS) proper motions. We performed a new determination of mean positions and proper motions on the ICRS system by combining USNO-B1.0 and 2MASS astrometry. This catalog is called PPMXL, and it aims to be complete from the brightest stars down to about V=20 full-sky. PPMXL contains about 900 million objects, some 410 million with 2MASS photometry, and is the largest collection of ICRS proper motions at present. As representative for the ICRS we chose PPMX. The recently released UCAC3 (Cat. I/315) could not be used because we found plate-dependent distortions in its proper motion system north of -20deg declination. UCAC3 served as an intermediate system for demta<-20deg. The resulting typical individual mean errors of the proper motions range from 4mas/yr to more than 10mas/yr depending on observational history. The mean errors of positions at epoch 2000.0 are 80 to 120 mas, if 2MASS astrometry could be used, 150 to 300 mas else. We also give correction tables to convert USNO-B1.0 observations of e.g. minor planets to the ICRS system. Description: PPMXL is a catalog of positions, proper motions, 2MASS- and optical photometry of 900 million stars and galaxies, aiming to be complete down to about V=20 full-sky. It is the result of a re-reduction of USNO-B1 together with 2MASS to the ICRS as represented by PPMX. Immediate queries can be achieved over the Internet with the "findppmxl" script included in the "cdsclient" package (works on any Linux/Unix platform, see http://cdsarc.u-strasbg.fr/doc/cdsclient.htx)