Create README.md

Author: Ibaronch

README.md

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+# python_library
+Useful python 2.7 functions and classes for astronomical uses
+
+Ivano Baronchelli 2018
+
+
+# List of classes:
+
+Deg2sex    
+Given RA and DEC in input, they will be returnet in output converted from decimal to sexagesimal or vice-versa (depending on intype and outype variables set).
+
+Match     
+matches a series of (integer) input IDs (like IDL match)
+
+Match_cat     
+Matches coordinates [deg], in two lists of coordinates, using an user specyfied searching radius dt[arcsec] For each source in the first catalog, the closest counterpart in the second catalog is associated.
+
+Readcol     
+Read specified columns in an ascii file and returns them in the specified format
+
+
+
+# List of functions:
+
+gaussfit     
+Simple mono-dimensional gaussian fit
+
+image_depth     
+measure depth (1sigma) of an image.fits using the random apertures method. 
+
+match     
+matches a series of (integer) IDs
+
+mk_regionfile     
+creates simple ds9 region files. 
+
+image_shift     
+shift the RA, DEC center of an image
+