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possible dispersion calibration bug in ISIS 5.9.0?
Posted: Fri Sep 22, 2017 2:26 pm
by Robin Leadbeater
Has the way the dispersion equation is calculated changed in ISIS 5.9 ? I am getting a consistent +1 pixel wavelength calibration error when I calculate the dispersion equation from a spectrum and then apply it to the same spectrum. I did not see this with 5.7.
Robin
Re: possible dispersion calibration bug in ISIS 5.9.0?
Posted: Fri Sep 22, 2017 5:36 pm
by Robin Leadbeater
It looks like the change in 5.9 to remove the bin 0/1 anomaly
http://www.astrosurf.com/buil/isis/new/release.html
has affected the way the dispersion equation is applied to other spectra
- ISIS_5_9_0_calibration_offset.png (11.48 KiB) Viewed 2604 times
I am rolling back to 5.7 for now
Robin
Re: possible dispersion calibration bug in ISIS 5.9.0?
Posted: Sat Sep 23, 2017 3:22 pm
by Christian Buil
Robin, the problem is fixed (I hope!). See V5.9.1 version:
http://www.spectro-aras.com/forum/viewt ... f=8&t=1854
Christian B