Intro, notes by Stubbs June 9, 2022
Goal is to learn how to extract reliable atmospheric transmission parameters from Rubin Observatory Auxiliary Telescope data. The instrument is a 'slitless spectrograph', that produces a spectrum of a star.
That spectrum is attenuated by the Earth's atmosphere, which imprints information about attenuation at each wavelength.
If we knew both the star's spectrum and the response function of the instrument, we'd divide the observed spectrum by the product of those two and the result would be the atmospheric transmission spectrum
details on this instrument are here: Dissertations in Nick Mondrik's PhD dissertation.
Looking through more atmosphere introduces more attenuation. If atmosphere is uniform then this depends only on 'zenith angle', or 'airmass': https://en.wikipedia.org/wiki/Air_mass_(astronomy)
airmass ~ secant(zenith angle).
Rubin data:
Start here to look at historical data:
https://roundtable.lsst.codes/rubintv/auxtel/historical
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