... The package stsdas.graphics needs to be loaded (to run imdisp_pos for getting # the NDC's of the display image) # set imtype="fits" # print " " print " *** Start of impol SPECIAL instrument demo *** " print " [stecf.impol and stsdas.graphics need to be loaded] " print " " # # (First delete any model reflection nebulae left over from previous demos) # print " Deleting any old demo files " imdel reflneb1*.fits verify=yes # # An input (intensity) image is required. ...

... RVSAO 2.0 is the latest release of a package for calculating apparent radial velocities of celestial objects from observed spectral shifts. ... XCSAO cross-correlates the Fourier transform of an object's spectrum against the transforms of a set of template spectra with known spectral shifts to obtain a velocity and error. ... Full documentation of this software, including numerous examples of its use, is on-line at http://tdc-www.harvard.edu/iraf/rvsao/ . ...

... Noise is added to # the image and statistical error and data quality files are also # formed. ... rm test1t*.tab # # Get 128x128, 256x256 and 256x64 images and set to zero # imcopy dev$pix[1:128,1:128] testbas.fits imarith operand1= testbas.fits op= * operand2=0 ... operand1= testbas.fits op= * operand2=0.0 result= test256.fits # # Form a noiseless Gaussian star image of FWHM 4.0 pixels # print print Creating three identical stellar Gaussian images (FWHM=4pix) ...