Flatfielding Errors in Strömvil CCD Photometry

Abstract

The importance of determining the error of the flat field in CCD photometry is detailed and our methods of doing this are described. We now have reached a precision of 1-1.5 % in our photometry. Color-magnitude diagrams of the open cluster M67 (ours and Laugalys et al. 2003) are compared.

Keywords

• methods
• observational techniques
• photometric ccd photometry
• flat field errors clusters
• individual
• m67