APER | Circular APERture photometry |
CNTRD | Obtain the centroid of a star by locating where derivatives go to zero |
DAOERF | Calculate the intensity, (and optionally, the derivatives) of a bivariate Gaussian, integrated over pixels. Called by DAO_VALUE |
DAO_VALUE | Obtain the value of a DAOPHOT PSF function at a given set of points |
FIND | FIND point sources within an image |
GCNTRD | Determine centroid by Gaussian fits to the marginal X,Y distributions |
GETPSF | Obtain a PSF (Gaussian + residuals) from isolated stars. |
GROUP | Place stars with non-overlapping PSF's in distinct groups |
MMM | Mean, Median, Mode) sophisticated sky background computation |
NSTAR | Simultaneous PSF fitting of a group of stars |
PIXWT | Compute the area of the intersection of a circle on a rectangle |
PKFIT | Fit a Gaussian + residuals to a isolated star (called by GETPSF) |
RDPSF | Read a PSF file that was created by GETPSF into an IDL array. |
RINTER | Cubic Interpolation at a set of reference points, optionally obtain derivatives. (in /image) |
SKY | Compute image sky level using MMM |
SRCOR | Correlate the source positions in two different lists |
SUBSTAR | Subtract a scaled PSF at specified star positions |
T_APER | Driver procedure for APER with I/O to a disk FITS ASCII table |
T_FIND | Driver procedure for FIND with I/O to a disk FITS ASCII table |
T_GROUP | Driver procedure for GROUP with I/O to a disk FITS ASCII table |
T_GETPSF | Driver procedure for GETPSF with I/O to a disk FITS ASCII table |
T_NSTAR | Driver procedure for NSTAR with I/O to a disk FITS ASCII table |
T_SUBSTAR | Driver procedure for SUBSTAR with I/O to a disk FITS ASCII table |