北天帽的双色CCD巡天：I.述的方法
A Two-Colour CCD Survey of the North Celestial Cap: I. The Method
摘要：
我们描述的技术方面的天体测量和光度测量的北天球帽（NCC），从极点（DEC=90度）到DEC=80度，在支持TAUVEX任务。这一区域位于银河系纬度约17度至约37度之间，在现代CCD测量中覆盖率很低。观测是用怀斯天文台的一米反射镜和一台新的镶嵌式CCD相机（LAIWO）进行的，该相机在约翰逊-伯灵顿R和I波段以亚弧秒像素成像一平方度的视场。这些图像使用IRAF和SExtractor进行处理，以产生源的最终目录。根据USNO-A2.0星表，对于亮度大于R=20.0或I=19.1等的点源，天体测量精度可达~ 1角秒，测光精度可达~ 0.1等，测光误差小于0.15等的巡天极限星等分别为20.6等（R）和19.6等（I）。我们分离的R和I波段的对象的形状的基础上，从非恒星的对象，试图重现SDSS的恒星/星系二分法。完备性检验表明，星表是完备的。
英文摘要：
We describe technical aspects of an astrometric and photometric survey of the North Celestial Cap (NCC), from the Pole (DEC=90 deg) to DEC=80 deg, in support of the TAUVEX mission. This region, at galactic latitudes from ~ 17 deg to ~ 37 deg, 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 subarcsec 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 ~ 1 arcsec and the photometry is good to ~ 0.1 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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
