[AstroPy] DS9 color tables in Python

Peter Weilbacher pweilbacher at aip.de
Thu Apr 2 12:11:40 EDT 2015

Thanks, everybody, for the comments in this thread. It would be great to
get these color tables into astropy.

In the short term, the hint that I can get very similar versions of all
these tables from CIAO has given me exactly what I need. I just did

    import numpy
    import matplotlib.colors as colors
    import matplotlib.cm as cm
    import aplpy

    hsv = numpy.loadtxt('hsv.lut')
    ciao_hsv = colors.ListedColormap(hsv, 'ciao_hsv')

    halpha = aplpy.FITSFigure('2015_data/halpha.fits', 3)

and got a very nice plot -- exactly what I need!

The tables from CIAO are numerically a bit different from the ones I
managed to export from DS9 as three-column tables (like hsv). But in
practise, I can hardly notice the difference in the plots.

Dr Peter Weilbacher                 http://www.aip.de/People/PWeilbacher
Phone +49 331 74 99-667                       encryption key ID 7D6B4AA0
Leibniz-Institut für Astrophysik Potsdam (AIP)
An der Sternwarte 16, D-14482 Potsdam

Vorstand: Prof. Dr. Matthias Steinmetz
Stiftung bürgerlichen Rechts, Stiftungsverz. Brandenburg: 26 742-00/7026

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