Hi all,
I have a second posting on the crosstalk estimates from CMB data. I
have repeated the earlier analysis but without the [ADU/airmass]
factor, so that a 1% crosstalk signal will now be simply 1% in units of
CMB temperature. The results match the previous CMB analysis, but with
a few additional RGL channels included. The A/B difference and the
outliers still remain.
I think I can explain these features in terms of deviation from the
mean B_l beam profile used in the sims. If a detector has a different
beam shape, the signal subtraction won't work well, and the residual
may correlate with the offset crosstalk beam from the crosstalk sims.
Fig. 4 of the note shows a correlation between beem width and estimated
crosstalk, and I take this as support for the idea that beam shape is
having an effect here.
http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20130830_cmb_xt…
- Walt