Attempt to generate instrument response curve in RSPEC software for CCDSPEC using Altair spectrum from 10/10/2018

This post follows on from this previous one:

Spectroscopy of Altair (and Vega) in Lichfield, UK 11/10/2018, using CCDSPEC, Sky Watcher Equinox Pro 80mm OTA on Manfrotto manual mount

Today (11/10/2018), I had a go at generating an instrument response curve in RSPEC software for CCDSPEC using Altair spectrum from 10/10/2018.

Andy

My Altair Spectrum from 10/10/2018 (LRO, CCDSPEC, Sky Watcher Equinox Pro 80mm):

Dividing Altair spectrum by smoothed A7V reference spectrum leads to instrument response curve below:

Applying instrument response curve above to Vega spectrum in RSPEC:

See following post for a follow up to this post 11/10/2018:

Using the “subtract background” function in RSPEC Software to bring the baseline down towards zero on Altair spectrum from 10/10/2018

3 Responses

  1. OOOps!!, sorry poor disagreement is in UV not IF, and will probably be related to cameras sensitivity in this part of spectrum. The little grey cells are definitely on the way out!
    I think realistically if we can get a good match in visible part of spectrum , we’re doing well.

    Pete

  2. Nice results Andy, have just taken new spectra of Vega myself on Tues night , plus some others, using the Spectrum Analyser grating.
    Couple of points, have you tried using the remove background to bring your level down?
    Where you have poor disagreement is in the infra red part of the spectrum, this will depend upon camera sensitivity.

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