SPECTROSCOPY

RETURN TO SPECTROSCOPY INTRODUCTION

BACK TO ASTRONOMY HOME

 

Correcting spectra for Instrument Response using reference spectra from the MILES database

 

A series of exercises exploring the precision of relative flux calibration of low resolution spectra using slitless and slit spectrographs.

See bottom of the page for the latest run.

 

 

(Click to download pdf)

This document demonstrates how an instrument response derived from a measurement of an A class  star from the MILES database of reference star spectra can be used to correct Star Analyser spectra of any target regardless of spectral class. 

 

 

(Click to download pdf)

This document describes a similar exercise using the ALPY 600 slit spectrograph. Note how changes in focus of this achromatic setup  affected the instrument response due to selective sampling by wavelength at the slit.

 

(Click to download pdf)

This document describes a further exercise exploring the precision of relative flux calibration using the ALPY 600 slit spectrograph. It was carried out as part of a BAA spectroscopy initiative.  Good repeatability and errors in relative flux of the order of 2% or better were obtained in the range 4000-7300A. 

 

See these discussions on the ARAS forum for more details of how the Miles database can be used as a source of reference stars for calibration of low resolution spectra.

http://www.spectro-aras.com/forum/viewtopic.php?f=6&t=207     (Thread in French initially, changing to English)

http://www.spectro-aras.com/forum/viewtopic.php?f=6&t=207&start=30#p2162    (Direct link to post describing spreadsheet developed to select Miles spectra)

 

Note that the Miles and many other reference spectra are now also built into the ISIS data reduction software package

 

RETURN TO SPECTROSCOPY INTRODUCTION

BACK TO ASTRONOMY HOME