get_sky_spectrum¶
-
simcado.spectral.get_sky_spectrum(fname, airmass, return_type=None, **kwargs)[source]¶ Return a spectral curve for the sky for a certain airmass
- Parameters
- fnamestr
the file containing the spectral curves
- airmassfloat, optinal
Default is 1.0. Acceptable values are between 1.0 and 3.0
- return_typestr, optional
[“transmission”, “emission”, None] Default is None. A TransmissionCurve or EmissionCurve object will be returned if desired. If None two arrays are returned: (lam, val)
- **kwargsoptional
kwargs are passed directly onto the TransmissionCurve or EmissionCurve classes
- Returns
- TransmissionCurve or EmissionCurve or (lam, val)
By default lam is in [um] and val [ph/s/m2/um/arcsec2] if val is an emission spectrum
Notes
This function is designed to work with a table of values produced by SkyCalc The column names must begin with lambda and then columns must be named according to the airmass following this pattern: “X1.5” for an airmass of 1.5