========================================================================== I/311 Hipparcos, the New Reduction (van Leeuwen, 2007) *** Note that the version which was available at CDS in the period *** *** 2008-July-07 to 2008-Sept-16 was faulty, please disregard any *** *** result having made use of the version copied in this period. *** ========================================================================== Query from: http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=I/311 ==========================================================================
drwxr-xr-x 277 cats archive 4096 Mar 12 11:23 [Up] drwxr-xr-x 2 cats archive 4096 May 12 09:53 [TAR file] -rw-r--r-- 1 cats archive 581 Jun 16 2010 .message -r--r--r-- 1 cats archive 10375 Jun 16 2010 ReadMe -rw-r--r-- 1 cats archive 2133 Apr 18 2012 +footg5.gif -rw-r--r-- 1 cats archive 16134 May 6 2012 +footg5.png -rw-r--r-- 1 cats archive 35813 Jun 16 2010 +footg8.gif -rw-r--r-- 1 cats archive 126271 May 6 2012 +footg8.png -r--r--r-- 1 cats archive 8977907 Sep 15 2008 hip2.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 173940 Sep 15 2008 hip7p.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 28600 Sep 15 2008 hip9p.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 3250 Sep 15 2008 hipvim.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 129745 Jun 5 2008 intro.pdf
Beginning of ReadMe : I/311 Hipparcos, the New Reduction (van Leeuwen, 2007) ================================================================================ Hipparcos, the new Reduction of the Raw data van Leeuwen F. <Astron. Astrophys. 474, 653 (2007)> =2007A&A...474..653V ================================================================================ ADC_Keywords: Positional data ; Proper motions ; Parallaxes, trigonometric ; Photometry ; Fundamental catalog Mission_Name: Hipparcos Keywords: space vehicles: instruments - methods: data analysis - catalogs - astrometry - instrumentation: miscellaneous Abstract: A new reduction of the astrometric data as produced by the Hipparcos mission has been published, claiming accuracies for nearly all stars brighter than magnitude Hp=8 to be better, by up to a factor 4, than in the original catalogue. The new Hipparcos astrometric catalogue is checked for the quality of the data and the consistency of the formal errors as well as the possible presence of error correlations. The differences with the earlier publication are explained. Methods. The internal errors are followed through the reduction process, and the external errors are investigated on the basis of a comparison with radio observations of a small selection of stars, and the distribution of negative parallaxes. Error correlation levels are investigated and the reduction by more than a factor 10 as obtained in the new catalogue is explained. Results. The formal errors on the parallaxes for the new catalogue are confirmed. The presence of a small amount of additional noise, though unlikely, cannot be ruled out. Conclusions. The new reduction of the Hipparcos astrometric data provides an improvement by a factor 2.2 in the total weight compared to the catalogue published in 1997, and provides much improved data for a wide range of studies on stellar luminosities and local galactic kinematics. Notice: The files included are slightly different from the ones published in the book, as an error that sometimes affected the goodness of fit value for the solution was corrected. The first version of these files (between June and 15 September 2008) also contained errors corrected after this date.
© UDS/CNRS