load_MAST_calspec¶
- specreduce.calibration_data.load_MAST_calspec(filename, cache=True, show_progress=False)[source]¶
Load a standard star spectrum from the
calspec
database at MAST. These spectra are provided in FITS format and are described in detail at:If
remote
is True, the spectrum will be downloaded from MAST. Setremote
to False to load a local file.Note
This function requires
synphot
to be installed separately.- Parameters:
- filenamestr
FITS filename of a standard star spectrum, e.g. g191b2b_005.fits. If this is a local file, it will be loaded. If not, then a download from MAST will be attempted.
- cachebool (default = True)
Toggle whether downloaded data is cached or not.
- show_progressbool (default = True)
Toggle whether download progress bar is shown.
- Returns:
- spectrum
Spectrum1D
or None If the spectrum can be loaded, return it as a
Spectrum1D
. Otherwise return None. The spectral_axis units are Å and the flux units are milli-Janskys.
- spectrum