Next: Imaging Polarimetry with NICMOS Up: NICMOS Data Calibration and Previous: The Photometric Performance of . ... NICMOSlook and Calnic C . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... NICMOSlook and Calnic-C are two programs that were designed to take advantage of the fact that the NICMOS grism mode typically consists of taking both a direct and a grism image. ...

... 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) ...

Next: Analysis Tools for Nebular Emission Lines . ... Extracting spectra from a large number of NICMOS grism images requires a convenient interactive tool which allows a user to manipulate direct/grism image pairs. ... The direct image is used to locate objects of interest, to find the position of the appropriate spectra in the grism image, to determine the optimal extraction technique to use, and to calibrate the wavelength range of the extracted spectra. ... Figure 1: The NICMOSlook User Interface . ...