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Software Dependencies
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*   Astropy (for some analysis functions)
*   photutils (for photometry)
*   matplotlib (for plotting)
*   DS9 (for image display) 

astropy >= 0.3

python >= 2.7

numpy >= 1.6.0

photutils > 0.0.dev
    This must be installed to enable the photometry options for imexam() but it is not required

scipy.optimize.curve_fit
