摘要：The Brorfelde Schmidt CCD Catalog (BSCC) contains about 13.7 million stars, north of +49° decl. with precise positions and V, R photometry. The catalog has been constructed from the reductions of 18,667 CCD frames observed with the Brorfelde Schmidt Telescope between 2000 and 2007. The Tycho-2 catalog was used for astrometric and photometric reference stars. Errors of individual positions are about 20-200 mas for stars in the R = 10-18 mag range. External comparisons with the Two Micron All-Sky Survey (2MASS) and Sloan Digital Sky Survey reveal possible small systematic errors in the BSCC of up to about 30 mas. The catalog is supplemented with J, H, and K s magnitudes from the 2MASS catalog.
关键词：astrometry;catalogs;methods: data analysis Online-only material: color figure
