TH2_to_FITS_header¶

gammapy.utils.root.TH2_to_FITS_header(hist, flipx=True)[source]¶

Create FITS header for a given ROOT histogram.

Assuming TH2 or SkyHist that represents an image in Galactic CAR projection with reference point at GLAT = 0, as is the case for HESS SkyHists.

Formulae and variable names taken from Plotters::SkyHistToFITS() in $HESSROOT/plotters/src/FITSUtils.C

Parameters:

hist : ROOT.TH2

ROOT histogram

flipx : bool

Flip x-axis?

Returns:

header : Header

FITS header