> I claim that each bandpower is effectively a single vector for purposes
> of the spectral jack. Any modes in other, perpendicular directions
> will drop out when you cross with BICEP2, so they are unconstrained.
> Chao-Lin is correct, though, that each ell bin should be independent.
I don't buy that. I don't see the distinction between the averaging down which
occurs within a bin and between bins. What if I made the bin twice as wide?
I think chance reduction of real power requires each independent mode to
cancel. And is therefore extremely unlikely when the number of modes is more
than a few.
Clem
--
**********************************************************************
Clem Pryke - Associate Professor - Physics
University of Minnesota,
Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455
Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu
**********************************************************************
http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20131106_b1xb2
Very interesting - B1 maps appear to contain the same B-modes as B2.
Clem
--
**********************************************************************
Clem Pryke - Associate Professor - Physics
University of Minnesota,
Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455
Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu
**********************************************************************
Hi Brian,
> From Clem/Jon: "I apply here a -2.27,-2.91 rotation to the B1 maps at
> 100/150GHz"
Did you notice that the pager has a button allowing to turn off these pol rot
fudge factors? Isn't the fact that this hardly effects the B2xB1 spectra in
the ell=80 and 110 bandpowers powerful empirical evidence that pol rot is not
the cause of the low ell BB signal?
Clem
--
**********************************************************************
Clem Pryke - Associate Professor - Physics
University of Minnesota,
Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455
Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu
**********************************************************************
Hi Walt,
Thanks for these thoughts - and we should do the tests you suggest.
I am not sure I'm convinced by your vectorial arguments though. They sound
right if there was just one mode. But of course in these ell bins there are
many independent modes - don't each of them have to accidentally cancel in the
same way to suppress a true signal in the cross spectrum? Or do you claim that
each bandpower is effectively just a single vector?
Clem
--
**********************************************************************
Clem Pryke - Associate Professor - Physics
University of Minnesota,
Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455
Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu
**********************************************************************
Hi everyone,
I've put up a note calculating a per-tag map consistency parameter.
This is similar to the per-channel parameter I've shown before. The
only period of outlier tags is in early March 2011 when we were
adjusting the mux and readout settings. There are a handful of other
scansets with slightly elevated chi2 parameter. I don't see any
smoking guns, but I have included the values in a csv file if anyone is
interested in them.
http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20131105_tag_pa…
- Walt
Hi all,
We will have our BICEP2 / Keck CMB result telecon in 10 minutes:
Tues, 29 Oct 2013 - 12:00 Eastern, 11:00 Central, 9:00 am Pacific
1-866-890-3820 (toll: 1-334-323-7229) Passcode: 59702175#
I will try to lead although I am under prepared - working on B1xB2...
Clem
--
**********************************************************************
Clem Pryke - Associate Professor - Physics
University of Minnesota,
Room 313 Tate, 116 Church Street S.E. Minneapolis, MN, 55455
Tel: 612-624-7578 Fax: 612-624-4578 email: pryke(a)physics.umn.edu
**********************************************************************
