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Titolo:
The CFHT Open Star Cluster Survey. I. Cluster selection and data reduction
Autore:
Kalirai, JS; Richer, HB; Fahlman, GG; Cuillandre, JC; Ventura, P; DAntona, F; Bertin, E; Marconi, G; Durrell, PR;
Indirizzi:
Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada Univ British Columbia Vancouver BC Canada V6T 1Z1 ver, BC V6T 1Z1, Canada Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA Canada France Hawaii Telescope Corp Kamuela HI USA 96743 la, HI 96743 USA Osservatorio Astron Roma, I-00136 Rome, Italy Osservatorio Astron Roma Rome Italy I-00136 on Roma, I-00136 Rome, Italy Inst Astrophys Paris, Paris, France Inst Astrophys Paris Paris FranceInst Astrophys Paris, Paris, France European So Observ, D-8046 Garching, Germany European So Observ GarchingGermany D-8046 erv, D-8046 Garching, Germany Penn State Univ, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 v, University Pk, PA 16802 USA
Titolo Testata:
ASTRONOMICAL JOURNAL
fascicolo: 1, volume: 122, anno: 2001,
pagine: 257 - 265
SICI:
0004-6256(200107)122:1<257:TCOSCS>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
GALACTIC CLUSTERS; CCD PHOTOMETRY; PROPER MOTIONS; NGC-1039 M34; WHITE-DWARFS; MEMBERSHIP; IC-4665; NGC-1750; NGC-6633; NGC-2169;
Keywords:
color-magnitude diagrams; methods : data analysis; open clusters and associations : general; techniques : photometric; white dwarfs;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Kalirai, JS Univ British Columbia, Dept Phys & Astron, 6224 Agr Rd, Vancouver, BC V6T 1Z1, Canada Univ British Columbia 6224 Agr Rd Vancouver BC Canada V6T 1Z1
Citazione:
J.S. Kalirai et al., "The CFHT Open Star Cluster Survey. I. Cluster selection and data reduction", ASTRONOM J, 122(1), 2001, pp. 257-265

Abstract

We present this paper in conjunction with a companion paper as the first results in the Canada-France-Hawaii Telescope Open Star Cluster Survey. Thissurvey is a large BVR imaging data set of 19 open star clusters in our Galaxy. This data set was taken with the CFH12K mosaic CCD (42' x 28'), and the majority of the clusters were imaged under excellent photometric, subarcsecond seeing, conditions. The combination of multiple exposures extending to deep (V similar to 25) magnitudes with short (less than or equal to 10 s)frames allows for studies ranging from faint white dwarf stars to bright turnoff, variable, and red giant stars. The primary aim of this survey is tocatalog the white dwarf stars in these clusters and establish observational constraints on the initial-final mass relationship for these stars and the upper mass limit to white dwarf production. Additionally, we hope to better determine the properties of the clusters, such as age and distance, and also test evolution and dynamical theories by analyzing luminosity and massfunctions. In order to more easily incorporate these data in further studies, we have produced a catalog of positions, magnitudes, colors, and stellarity confidence for all stars in each cluster of the survey. This reduction, along with the computed calibration parameters for all three nights of the observing run will encourage others to use these data in different astrophysical studies outside of our goals. Additionally, the data set is reducedusing the new TERAPIX photometric reduction package, PSFex, which is foundto compare well with other packages. This paper is intended both as a source for the astronomical community to obtain information on the clusters in the survey and as a detailed reference of reduction procedures for further publications of individual clusters. We discuss the methods employed to reduce the data and compute the photometric catalog. We reserve both the scientific results for each individual cluster and global results from the study of the entire survey for future publications. The first of these further publications is devoted to the old rich open star cluster, NGC 6819, and appears as a companion paper in the sameissue of the Journal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 15:43:26