UNCERTAINTIES OF ASTROMETRIC CATALOGUES SP MMC, XPM AND U CAC4 IN THE MAGELLANIC CLOUDS USING THE WIELEN METHOD
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| Format: | Artículo científico |
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Universidad Nacional Autónoma de México
2015
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| author | Eddy Dávila |
| author_facet | Eddy Dávila |
| contents | UNCERTAINTIES OF ASTROMETRIC CATALOGUES SP MMC, XPM AND U CAC4 IN THE MAGELLANIC CLOUDS USING THE WIELEN METHOD Eddy Dávila Katherine Vieira Física, Astronomía y Matemáticas catalogs Astrometry proper motion reference system The individual uncertainties of the proper motion catalogues SP M M C , XP M and U CAC 4 are determined using the method of Wielen, in an area of the sky containing the Magellanic Clouds. These uncertainties are a measure of the quality and the reliability of these catalogs for kinematical studies. The data preparation begins by cross identifying stars common to the catalogs, and on this sample, sys tematic differences are detected, modeled and corrected. After applying the Wielen method and evaluating the results, it fo llows that the catalog of best astrometric quality is U CAC 4, with an uncertainty of ( ǫ μ α cos ( δ ) , ǫ μ δ )=(2.92,1.90) mas/yr . The SP M M C has a quality similar to the previous catalogue, expressed as ( ǫ μ α cos ( δ ) , ǫ μ δ ) SP M MC UCAC 4 =(1.11,1.53) times the U CAC 4. Finally the quality for the XP M differs significantly from the other two catalogues, its errors are ( ǫ μ α cos ( δ ) , ǫ μ δ ) XP M UCAC 4 =(6.32,8.87) times the UCAC4. 2015 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57150514021 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.46 |
| format | Artículo científico |
| id | redalyc_57150514021 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | UNCERTAINTIES OF ASTROMETRIC CATALOGUES SP MMC, XPM AND U CAC4 IN THE MAGELLANIC CLOUDS USING THE WIELEN METHOD Eddy Dávila Física, Astronomía y Matemáticas catalogs Astrometry proper motion reference system UNCERTAINTIES OF ASTROMETRIC CATALOGUES SP MMC, XPM AND U CAC4 IN THE MAGELLANIC CLOUDS USING THE WIELEN METHOD Eddy Dávila Katherine Vieira Física, Astronomía y Matemáticas catalogs Astrometry proper motion reference system The individual uncertainties of the proper motion catalogues SP M M C , XP M and U CAC 4 are determined using the method of Wielen, in an area of the sky containing the Magellanic Clouds. These uncertainties are a measure of the quality and the reliability of these catalogs for kinematical studies. The data preparation begins by cross identifying stars common to the catalogs, and on this sample, sys tematic differences are detected, modeled and corrected. After applying the Wielen method and evaluating the results, it fo llows that the catalog of best astrometric quality is U CAC 4, with an uncertainty of ( ǫ μ α cos ( δ ) , ǫ μ δ )=(2.92,1.90) mas/yr . The SP M M C has a quality similar to the previous catalogue, expressed as ( ǫ μ α cos ( δ ) , ǫ μ δ ) SP M MC UCAC 4 =(1.11,1.53) times the U CAC 4. Finally the quality for the XP M differs significantly from the other two catalogues, its errors are ( ǫ μ α cos ( δ ) , ǫ μ δ ) XP M UCAC 4 =(6.32,8.87) times the UCAC4. 2015 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57150514021 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.46 |
| title | UNCERTAINTIES OF ASTROMETRIC CATALOGUES SP MMC, XPM AND U CAC4 IN THE MAGELLANIC CLOUDS USING THE WIELEN METHOD |
| topic | Física, Astronomía y Matemáticas catalogs Astrometry proper motion reference system |
| url | https://www.redalyc.org/articulo.oa?id=57150514021 |