I am not disputing that the Li absorption line exists in the WZ Cas spectrum. For example it seen clearly in the medium resolution R~2500 spectrum by Kevin Gurney in the BAA database.
Nor am I disputing your detection. I am just asking (with my peer reviewer hat on ;-) ) if the claim of detection in your spectrum is robust. At your R~100 resolving power the narrow Li line will be almost 70A wide FWHM and so will be severely diluted and blended with the TiO features so could potentially disappear into the noise. How does your detection compare with your noise floor and is the observation reproduceable ?
I certainly appreciate all your feedback.
I'm not sure I'm sophisticated enough to respond to your questions. I have measured S/N before with ISIS, but I'm not really sure what it meant. I did look at WZ Cas a couple times that night and every sub seemed to show a dip around 671 nm. I honestly don't completely understand reproduceability in spectroscopy. How many times does the radiologist have to reproduce an x-ray to say a bone is broken?
Thanks for the spectra by Kevin Gurney. Could you easily calculate the EW and FWHM for the sodium and lithium lines? I tried to estimate this roughly (difficult to see the continuum).
In my spectrum the Na I was roughly 55-60 angstroms FWHM which seemed close to what is seen in Kevin's spectrum.
In my spectrum the Li I was roughly 14 angstroms FWHM compared to Kevin's spectrum for which I estimated the FWHM to be about 8 angstroms.
I'm not really out to prove anything, but it would feel nice if my data were at least consistent with other data. Of course, I may be asking more of my data than it can reliably provide.
Edited by Organic Astrochemist, 09 November 2019 - 01:00 AM.