load_MAST_calspec

specreduce.calibration_data.load_MAST_calspec(filename, remote=True, cache=True, show_progress=False)

Load a standard star spectrum from the calspec database at MAST. These spectra are provided in FITS format and are described in detail at:

https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec # noqa

If remote is True, the spectrum will be downloaded from MAST. Set remote to False to load a local file.

Parameters:

filenamestr

FITS filename of the standard star spectrum, e.g. g191b2b_005.fits.

remotebool (default = True)

If True, download the spectrum from MAST. If False, check if filename exists and load it.

cachebool (default = True)

Toggle whether downloaded data is cached or not.

show_progressbool (default = True)

Toggle whether download progress bar is shown.

Returns:

spectrumSpectrum1D 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.