输入:daofind后应输入的参数 Input image(s) : Output coordinate file(s) (default: image.coo.?) (default): FWHM of features in scale units (CR or value): FWHM (2.45) Standard deviation of background in counts (CR or value):STDDEV (3.3) Detection threshold in sigma (CR or value):? (20) Minimum good data value (INDEF) (CR or value): Maximum good data value (INDEF) (CR or value): 输入:phot后应输入的参数 Input image(s) : Input coordinate list(s) (default: image.coo.?) (default): default Output photometry file(s) (default: image.mag.?): default Centering algorithm (centroid) (CR or value): centroid Centering box width in scale units (CR or value): 2*FWHM (4.9) Sky fitting algorithm (mode) (CR or value): mode Inner radius of sky annulus in scale units (CR or value): R2=5*FWHM(常取2倍R1) (9.8) Width of the sky annulus in scale units(CR or value):Width=2*FWHM(常取1倍R1) (5) File/list of aperture radii in scale units (CR or value): R1=1.5*FWHM(imexam) (5) Standard deviation of background in counts (CR or value): STDDEV (3.3) Minimum good data value (INDEF) (CR or value): INDEF Maximum good data value (INDEF) (CR or value): INDEF {参考文献} 1. 郑伟康老师:IRAF测光步骤简介; 2. IRAF系统。