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Observation by Padraig Houlahan: Vega Spectrum

Uploaded by

Padraig Houlahan

Observer

Padraig Houlahan

Observed

2021 Aug 21 - 14:02

Uploaded

2021 Aug 21 - 14:12

Objects

Vega
Spectrum

Equipment
  • Alpy 600 spectroscope
  • TMB92mm refractor
  • ZWO ASI183mc
Exposure

4s

Location

Arizona

Target name

Vega

Title

Vega Spectrum

About this image

A spectrum obtained while testing and learning how to use an Alpy 600 with a small refractor. The blue shows the raw spectrum, and I simply calibrated the instrument response curve using an A0V reference spectrum by smoothing (low pass filter) the raw divided by the reference curve. Then the original was divided by the IRC. It's not a proper independent correction, and more of a fast technique to use the reference curve to bend the raw data into shape, but it worked ok in this case, and illustrates the potential of the Alpy 600.

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Comments
Robin Leadbeater
Robin Leadbeater, 2021 Aug 31 - 17:51 UTC

Armed with this response curve (which includes the atmospheric extinction) you can now correct any other star provided it is at similar air mass. There is a document on my website here which goes into this in more detail

Padraig Houlahan
Padraig Houlahan, 2021 Sep 04 - 16:38 UTC

Thanks Robin!

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