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Calibration Access and Data Handbook

Description

A copy of this CCF component is used by the PHS tools.

The DiffuseGala file consists of three extensions:

DGL_MAP The mapping of the diffuse galactic emission in galactic coordinates. The map is in S10 units. When reading the Image extension DGL_MAP, the keywords CRVALn, CRPIXn and CDELTn have to be interpreted.

DGL_SPEC The assumed spectrum of the DGL.

DGL_COUNTS The expected count rates (cts/s/subpixel) in the different filter elements.

The format of the DiffuseGala CCF component is described in detail below.

Image: DGL_MAP

keyword name	keyword type	keyword unit	keyword value	comment
BITPIX		not applicable	-32
NAXIS	I	not applicable	2
NAXIS1	I	not applicable	varies
NAXIS2	I	not applicable	varies
CTYPE1	S	not applicable	gal. longitude
CRVAL1	E	degree	varies	reference longitude
CDELT1	E	degree	varies	increment of longitude
CRPIX1	I	not applicable	varies	address of reference pixel
CTYPE2	S	not applicable	gal. latitude
CRVAL2	E	degree		reference latitude
CDELT2	E	degree		increment of latitude
CRPIX2	I	not applicable	varies	address of reference pixel
BUNIT	S	S10(B)	may vary	Units of image

Binary table: DGL_SPEC

keyword	keyword type	keyword unit	keyword value
REF_INTENS	E	S10(B)	may vary
column name	column type	column unit	comment
LAMBDA	E	nm	wavelength
FLUX	E	$W/m^2/nm/deg^2$	DGL flux for reference intensity

Binary table: DGL_COUNTS

keyword	keyword type	keyword unit	keyword value
REF_INTENS	E	S10(B)	may vary
column name	column type	column unit	comment
FILTER_ID	9A	not applicable	filter ID
COUNTS	E	cts/sec/subpixel	expected flux per pixel
			at the reference intensity