spectral_efficiency

SpectralEfficiency

Applies the grating efficiency (blaze function) for a SpectralTraceList.

Input Data Format

The efficiency curves are taken from a fits file filename`with a structure similar to the trace definition file (see `SpectralTraceList). The required extensions are: - 0 : PrimaryHDU [header] - 1 : BinTableHDU or TableHDU[header, data] : Overview table of all traces - 2..N : BinTableHDU or TableHDU : Efficiency curves, one per trace. The

tables must have the two columns wavelength and efficiency

Note that there must be one extension for each trace defined in the SpectralTraceList. Extensions for other traces are ignored.

EXT 0 : PrimaryHDU

Required header keywords:

• ECAT : int : Extension number of overview table, normally 1

• EDATA : int : Extension number of first Trace table, normally 2

No data is required in this extension

EXT 1 : (Bin)TableHDU : Overview of traces

No special header keywords are required in this extension.

Required Table columns: - description : str : identifier for each trace - extension_id : int : which extension is each trace in

EXT 2 : (Bin)TableHDU : Efficiencies for individual traces

Required header keywords: - EXTNAME : must be identical to the description in EXT 1

Required Table columns: - wavelength : float : [um] - efficiency : float : number [0..1]