EUROPEAN SOUTHERN OBSERVATORY La Silla - Science Operations Department
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DHC/StanCal Verification Checklist

Where to look

Checklist

In the QC0 trend tab

• Check the "Last Point Date" corresponds to the data just acquired.
• In each graph of the QC0 summary movie check that the blue points do not deviate from the trends.
  

In the DRSinit web summary of this initialisation tab

• Visually compare with the DRSinit web summary of Reference initialisation for obvious deviations from "normal"
  
• Check the RMS plots, should be scattered about zero with no obvious trend (e.g. a "S" shape is sometimes seen). RMS value and the number of points is verified above in the QC0 verification.
• In the FF ratio plots check that that ratios for each order have amean value of unity and do not show trends, i.e. slopes (can indicate variable flux level from one or other of the halogen lamps) or increases or decreases at the ends of the orders (can indicate shutter problems). In case of issue check in the web summarys of the individual files:
  
  • From the "Bookmarks toolbar" select the "FEROS DRS" bookmark
  • click on the relevant date
  • examine the web summary plots of the individual frames, in particular look in the flat field summaries to check that the reduced spectra are flat with a mean of ONE any slopes shows variation in the flux level between individual exposures which could be due either to variable flux from the lamp or shutter problems. Such problems will also be evident in the FF ratio plots which would should trends other than flat lines with mean ONE.
    

Send comments to <ls-feros@eso.org> Last update: by J.D.Pritchad, December 16, 2005