[daip] Re: BPASS calibration problem?

[Eric Greisen]

Violette Impellizzeri writes:

 >   thanks for the quick reply. I am not sure I understand this correctly,
 > but I don't see why you'd want to introduce discontinuities like the
 > ones we observe in our POSSM plots with DOBAND 2 (the plot displayed in
 > POSSM.0600-0605.ps). The reason why we think there may be a problem with
 > this option is that both the data and the BP tables look good, only when
 > we apply the BP table with the DOBAND 2 option we get these extreme
 > spikes in our data - are they really intentional?
 > 
 > Otherwise the doband 3 option is fine for our purposes, and we will
 > probably need some more bandpass calibration - trying BPSMO sounds like
 > a good idea.

The DOBAND 2 option abruptly switches from one BP table to the next
with no interpolation whatsoever.  This is fundamentally a
discontinuity.  It should do nothing really bad except apply a BP that
is old to one record and a duifferent bp that is too new to the
adjacent one.  This could have bad consequences.  I guess I should
look harder at what you sent to see if there is something beyond that
happening.

Eric Greisen