mixed calibration

#580166
Robin Leadbeater
Participant

Hi David,

The ALPY calibration module has always had the NeAr lamp. The link I posted was specifically for calibration the ALPY. The first line used in the  ALPY calibration is 3946.1 and the calibration deteriorates below there. eg

 http://www.astrosurf.com/buil/isis/guide_alpy/calibration/fig_fr22.png

What  is the first line you use with the LISA? (note some lines which might be resolved at the LISA resolution could be blends with the ALPY so not useable)

When calibrating the ALPY with the NeAr lamp, ISIS definitely reports the fit values not the published values. You can see examples on the page linked. For example

http://www.astrosurf.com/buil/isis/guide_alpy/calibration/fig_fr19.png

and for a bad calibration

http://www.astrosurf.com/buil/isis/guide_alpy/calibration/fig_fr23.png

Cheers

Robin