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External calibration files

Reference wavelength table

Table giving reference wavelengthes of arc lamp lines, primarily to be used for spectral calibration (wcalib) but also by mask creation (create_mask) and optical-model plot (plot_optics).

Columns
Arc lamps
See also:
read_lbdaref_table()

Reference flux table

Table giving reference flux of photometric standard star, used for flux calibration computation (calib_flux).

Columns
Column names are free, and passed as arguments to calib_flux along reference flux table name. Typically, The units of the flux column are set by the standard FITS table keyword TUNITn, or, if absent, from keyword FLXUNITS.
See also:
read_lbdaref_table()

Extinction table

Table giving atmospheric extinction, used for flux calibration computation (calib_flux).

Columns
Column names are free, and passed as arguments to calib_flux along extinction table name. Typically,
Mauna-Kea extinction curve
MK_extinction.fits is derived from CFHT Bulletin, number 19, p. 16 (1988).

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