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apmags,aperrs,skys,sigs,skws = foto(im,apertures,lobad,hibad,adu,rn,catx,caty,calcsky,verb) im = the 2D numpy array apertures = 1D numpy array that is the list of circular diameters. the last two entries are the inner and outer sky annulus radii [this is basically like the contents of DAOPHOT2's apertures data file] lobad = just like DAOPHOT2's low data number, below which data are considered bad hibad = just like DAOPHOT2's high data number, above which data are considered bad adu = gain in electrons per DN rn = read noise in electrons catx,caty = 1D arrays for X and Y positions of objects [I think these are assuming the 1st pixel coordinate starts at 1 --- because that's how DAOPHOT2 likes to play, given that it is FORTRAN] calcsky = 1 or 0 depending on if you want the routine to calculate local sky values from the sky annuli. Sometimes I like to make a sky map using various filterings of the image, subtract it off, and then use calcsky=0 verb = 1 or 0, depending on if you like a lot of stuff to hit your screen apmags = 2D array of aperture magnitudes aperrs = 2D array of aperture magnitude errors skys = 1D array of sky values from the sky annuli sigs = 1D array of sigmas from the sky annuli skws = 1D array supposed to be the skews from the sky annuli but I might have broken this

tar archive icon fotometry.tar.gz — tar archive, 30 KB (31330 bytes)