too-strong CH lines in Gaia ESO survey linelist?

[ajwheeler]

Sarah Aquilina recently brought to my attention that when she synthesized a small window using the GES linelist, her pseudocontinuum was offset from was she got synthesizing a large window. This indicates the influence of distant lines, and turning up the line_buffer when synthesizing in the small window confirmed that.

I ran some checks with subsets of the GES linelist and determined that the culprit is a few (~tens) CH lines with weirdly large oscillator strengths. I have checked that a couple of these are actually present in the Heiter et al tables, so I don't think I'm making a parsing error.

Here's a subset:

If I plot a histogram of $\log gf$ values of CH lines in the GES linelist table alongside the same histogram from Masseron 2014, which is the source. It also looks like too-strong lines may have been inserted erroneously. Note that the Masseron table include things outside the wavelength range of the GES linelist, and that other cuts may have been made, so we shouldn't expect an exact correspondence.