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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 559215.0, MPI für Astronomie / Publikationen_mpia
A two-color CCD survey of the North Celestial Cap: I. The method
Authors:Gorbikov, Evgeny; Brosch, Noah; Afonso, Cristina
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Astrophysics and Space Science
Issue / Number:2
Start Page:203
End Page:217
Sequence Number of Article:10.1007/s10509-009-0242-0
Review Status:not specified
Audience:Experts Only
Abstract / Description:We describe technical aspects of an astrometric and photometric survey of the North Celestial Cap (NCC), from the Pole ( δ=90°) to δ=80°, in support of the TAUVEX mission. This region, at galactic latitudes from Ëœ17° to Ëœ37°, has poor coverage in modern CCD-based surveys. The observations are performed with the Wise Observatory one-meter reflector and with a new mosaic CCD camera (LAIWO) that images in the Johnson-Cousins R and I bands a one-square-degree field with sub-arcsec pixels. The images are treated using IRAF and SExtractor to produce a final catalogue of sources. The astrometry, based on the USNO-A2.0 catalogue, is good to Ëœ1 arcsec and the photometry is good to Ëœ0.1 mag for point sources brighter than R=20.0 or I=19.1 mag. The limiting magnitudes of the survey, defined at photometric errors smaller than 0.15 mag, are 20.6 mag ( R) and 19.6 ( I). We separate stars from non-stellar objects based on the object shapes in the R and I bands, attempting to reproduce the SDSS star/galaxy dichotomy. The completeness test indicates that the catalogue is complete to the limiting magnitudes.
Free Keywords:Instrumentation; Photometry; Astrometry; North Celestial Pole; Survey
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010Ap%26SS.326..203... [ID No:1]
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