Version 2.3.9 July 7, 2022 (modifiable skew, new halo mod #s, eff script)

New Physics Modeling:

• Skewness can be turned off and on now for ER just like for NR. For on -> old model or fixed (Quentin Riffard, LZ/LBNL)
• Older beta model is default for gaseous Xenon, a better fit to old world data at the keV scale (Eric Church, DUNE/PNNL)
• New dark matter halo model defaults, bringing NEST up to date on WIMP and Sun v's (Baxter et al., arXiv:2105.00599)

New Code Features (Matthew Szydagis, LZ/UAlbany):

• Verbosity level is not a Boolean any more but an integer, easily allowing different amounts
• A bash script is included in the examples subfolder now for studying efficiency vs. E
• rootNEST no longer quits out if efficiency fit bad but asks user what they want to do instead
• rootNEST now allows for custom upper limits on the number of signal evts, for PLR mimicry

Miscellaneous Bug Fixes:

• Fluctuations adjust for difference in width from truncated Gaussians for PE not just mean
• Complaint that position resolution too poor does not activate until above S2 (top) of 40 PE
• In the dE/dx-based model the minimum LET is now 1.0 MeV/cm not 0 to avoid weirdness