![]() One advantage of the Java tool data is that rejected transits are clearly denoted by negative abscissa residual uncertainties (SRES). This data is currently not available from the ESA legacy archive.įor most stars in the Hipparcos-2 catalogue, results using the IAD from the DVD are indistinguishable from results using the IAD from the Java tool. The rest of each file is mostly identical to the IAD format of the DVD: it provides the individual observations of this star expressed as abscissa residuals against the astrometric reference solution. An eleven line header gives auxiliary information together with the astrometric reference parameters. The data is provided as one ASCII file per star. Van Leeuwen and Michalik (2021) have provided a human readable version of the IAD of the Java tool in a zip file. The tool comes with a set of binary files containing the astrometric catalogue as well as intermediate astrometry data consistent with it. The astrometric data is based on the same updated reduction criteria as the VizieR dataset, but one additional iteration (iteration 15) of the astrometric solution was done. Therefore, the astrometric results of some sources are different from VizieR, but the difference is almost always within their formal uncertainties.
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