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NICMOS Tutorial

The following tutorials may help you with your NICMOS data analysis.

  • The preferred method to combine and mosaic NICMOS observations is to use the MultiDrizzle routine in the stsdas.analysis.dither package. MultiDrizzle can be used to create a combined mosaic of the available data, further refine the rejection of cosmic rays, and produce images with optimally resampled pixel size to make full use of all the information contained in original dithered data. A full description of how to run MultiDrizzle with NICMOS data is available in the NICMOS section (Section 6.3) of the MultiDrizzle Handbook
  • The Dither Handbook is a highly detailed cookbook-type document that explains with examples how to use the STSDAS Dither/Drizzle software.
  • A brief summary of the steps required to perform absolute photometry measurements in NIC1, NIC2 and NIC3 can be found in the NICMOS Photometry Cookbook. The steps described here are no longer valid for most of the current calibration values, which have wavelength dependent aperture corrections. However, polarimetry and grism calibrations should still be performed this way, as they have not been recalibrated in the method with aperture corrections. NICMOS Group November 16, 2001.