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New Astronomical Reduction of Old Observations (the NAROO project)

Published online by Cambridge University Press:  07 March 2018

Jean-Eudes Arlot ,
Vincent Robert ,
Valery Lainey ,
Coralie Neiner  and
Nicolas Thouvenin
Jean-Eudes Arlot
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 CNRS, PSL, 77 avenue Denfert-Rochereau, F-75014 Paris, France email: arlot@imcce.fr
Vincent Robert
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 CNRS, PSL, 77 avenue Denfert-Rochereau, F-75014 Paris, France email: arlot@imcce.fr IPSA, Institut Polytechnique des Sciences Avancees, 63 boulevard de Brandebourg, F-94200 Ivry sur Seine, France email: vincent.robert@imcce.fr
Valery Lainey
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 CNRS, PSL, 77 avenue Denfert-Rochereau, F-75014 Paris, France email: arlot@imcce.fr
Coralie Neiner
Affiliation:
LESIA, Observatoire de Paris, UMR 8109 CNRS, PSL, email: coralie.neiner@obspm.fr
Nicolas Thouvenin
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 CNRS, PSL, 77 avenue Denfert-Rochereau, F-75014 Paris, France email: arlot@imcce.fr
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Abstract

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The Gaia astrometric reference catalogue will provide star proper motions with an accuracy of one mas one century ago for stars of magnitude 14 or brighter. Our project is to re-reduced the old observations with the new catalogue allowing to have an astrometric accuracy only limited by the observational biases and not by reference stars. Then, we plan to get an accuracy of 50 mas where the old reductions were not better than 500 mas!

For our purpose, we will digitize old photographic plates with a sub-micrometric scanner. Tests were made using the UCAC catalogue showing that old photographic plates have an intrinsect accuracy of 30 to 60 mas.

Keywords

astrometryphotographic platesphotometryspectrometrysolar system

References

Robert, V., Pascu, D., Lainey, V., Arlot, J.-E., De Cuyper, J.-P., Dehant, V., & Thuillot, W., 2016, Astron. Astrophys., 596, A37 CrossRefGoogle Scholar