M2000: An astrometric catalog in the Bordeaux Carte du Ciel zone $\mathsf{+11\degr \leq \delta \leq +18\degr}$

Rapaport, M.; Campion, J.-F. Le; Soubiran, C.; Daigne, G.; Périé, J. P.; Bosq, F.; Colin, J.; Desbats, J. M.; Ducourant, C.; Mazurier, Joël; Montignac, G.; Ralite, N.; Requieme, Y.; Viateau, B.

doi:10.1051/0004-6361:20010928

Cited by 26 publications

(25 citation statements)

References 11 publications

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“…It was derived from the compilation of systematic drift-scan observations in the Bordeaux Carte du Ciel Zone with the Bordeaux automated meridian circle (Viateau et al 1999) carried out over four years, the reduction of 512 Carte du Ciel plates (epoch t ≈ 1900) of the Bordeaux zone (Rapaport et al 2001) scanned at the APM Cambridge, and the catalogues AC2000.2 (t ≈ 1907), USNO-A2.0 (t ≈ 1950) and the unpublished USNO Yellow Sky (YS3, t ≈ 1978). The positional precision ranges from 50 to 70 mas, while the propermotion precision varies from 1.5 to 6 mas yr −1 , depending on the magnitude.…”

Section: The Pm2000 Cataloguementioning

confidence: 99%

Kinematic parameters and membership probabilities of open clusters in the Bordeaux PM2000 catalogue

Krone-Martins

Soubiran

Ducourant

et al. 2010

A&A

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Aims. We derive lists of proper-motions and kinematic membership probabilities for 49 open clusters and possible open clusters in the zone of the Bordeaux PM2000 proper motion catalogue (+11 • ≤ δ ≤ +18 • ). We test different parametrisations of the proper motion and position distribution functions and select the most successful one. In the light of those results, we analyse some objects individually. Methods. We differenciate between cluster and field member stars, and assign membership probabilities, by applying a new and fully automated method based on both parametrisations of the proper motion and position distribution functions, and genetic algorithm optimization heuristics associated with a derivative-based hill climbing algorithm for the likelihood optimization.Results. We present a catalogue comprising kinematic parameters and associated membership probability lists for 49 open clusters and possible open clusters in the Bordeaux PM2000 catalogue region. We note that this is the first determination of proper motions for five open clusters. We confirm the non-existence of two kinematic populations in the region of 15 previously suspected non-existent objects.

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Section: The Pm2000 Cataloguementioning

confidence: 99%

Kinematic parameters and membership probabilities of open clusters in the Bordeaux PM2000 catalogue

Krone-Martins

Soubiran

Ducourant

et al. 2010

A&A

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“…The status of NGC 1807 is debatable but it still appears listed as open cluster (Rapaport et al 2001). Some authors do not consider it a physical open cluster (Becker & Fenkart 1971;Purgathofer 1961), while others have proposed that it could constitute a multiple system with NGC 1817 (Barkhatova 1963).…”

Section: Introductionmentioning

confidence: 99%

uvby–H$_{\beta}$ CCD photometry of NGC 1817 and NGC 1807

Balaguer-Núñez

Jordi²,

Galadí-Enríquez

et al. 2004

A&A

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Abstract.We have investigated the area of two NGC entries, NGC 1817 and NGC 1807, with deep CCD photometry in the uvby-H β intermediate-band system. The photometric analysis of a selected sample of stars of the open cluster NGC 1817 yields a reddening value of E(b − y) = 0.19 ± 0.05, a distance modulus of V 0 − M V = 10.9 ± 0.6, a metallicity of [Fe/H] = −0.34 ± 0.26 and an age of log t = 9.05 ± 0.05. Our measurements allow us to confirm that NGC 1807 is not a physical cluster.

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“…To avoid such complications, we are obtaining new epoch observations with a monolithic 111M pixel CCD camera attached to the USNO Twin Astrograph's "red lens" tube. In parallel, we have already observed two DAS fields with the Bordeaux automatic CCD meridian circle, in a time delay integration mode (e.g., Rapaport et al 2001). Except for the final coordinate zeropoint, such observations are independent of the reference catalog and should help to minimize local systematics in UCAC.…”

Section: Local Improvements To the Ucacmentioning

confidence: 99%

Deep Astrometric Standards

Platais

Fey

Frey³

et al. 2007

Proc. IAU

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Abstract. The advent of next-generation telescopes with very wide fields-of-view creates a need for deep and precise reference frames for astrometric calibrations. The Deep Astrometric Standards (DAS) program is designed to establish such a frame, by providing absolute astrometry at the 5-10 mas level in four 10 deg 2 Galactic fields, to a depth of V = 25. The source of our basic reference frame is the UCAC2 catalog, significantly improved by additional observations, and new VLBI positions of radio-loud and optically visible QSOs. We describe all the major steps in the construction of the DAS fields and provide the current status of this project.

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M2000: An astrometric catalog in the Bordeaux Carte du Ciel zone $\mathsf{+11\degr \leq \delta \leq +18\degr}$

Cited by 26 publications

References 11 publications

Kinematic parameters and membership probabilities of open clusters in the Bordeaux PM2000 catalogue

Kinematic parameters and membership probabilities of open clusters in the Bordeaux PM2000 catalogue

uvby–H$_{\beta}$ CCD photometry of NGC 1817 and NGC 1807

Deep Astrometric Standards

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