W28 transformation coefficients

Tom Krajci asked if we could remove SN 2010jl from the W28 queue, and so that prompted me to finish the analysis of the photometry that we've acquired.  That in turn made me update the transformation coefficients for the telescope.  These will eventually end up on the web page, but for the time being, here they are (based on 3 recent nights 101118, 101119, 101123):

Tv = -0.017 +/- 0.009

Tbv = 1.060 +/- 0.021

Tvr = 1.047 +/- 0.024

Tri = 0.984 +/- 0.013

Tvi = 1.017 +/- 0.006

These are pretty typical values for the new Astrodon interference filters. Typical Fall extinction coefficients:

kv = 0.107

kbv = 0.130

kvr = 0.019

kri = 0.042

kvi = 0.061

Arne