ICRF densification via HIPPARCOS-2MASS cross-identification

Details ICRF densification via HIPPARCOS-2MASS cross-identification ICRF densification via HIPPARCOS-2MASS cross-identification

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..610d&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

International Celestial Reference System

Scientific paper

Various recent big catalogues are useful for the densification of the International Celestial Reference Frame (ICRF) at optical infrared radio X and other wavelengths. The Two Micron All Sky Survey (2MASS) is the near infrared catalogue of astrometry and photometry data. From 1997 the HIgh Precision PARallax COllecting Satellite (HIPPARCOS) Catalogue is the primary optical counterpart of the ICRF. We made the cross-identification between the HIPPARCOS and 2MASS by using 3sigma criterion (useful for cross-identification of very big new catalogues with millions stars) and the analysis of systematic positional differences of detected common stars. Our calculated standard error of unit weight of positional differences is close to 0.10 arcsec and in line with the other results (0.11 arcsec of ACT-2MASS and 0.12 arcsec of UCAC-2MASS). Basic results of our investigations are presented here.

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