27 Aug
2013
27 Aug
'13
3:25 p.m.
Hi,
I've posted the Keck 2013 maps here:
http://bicep.caltech.edu/~spuder/keck_analysis_logbook/analysis/20130827_ke…
Keck2013 is currently at the Keck2012 noise levels (data through Aug
19th). There is a surprising amount of correlation between BICEP2 and
Keck2013.
-Sarah
27 Aug
27 Aug
4:10 p.m.
Wow, the Keck 2013 rx3 and rx4 maps look really good.
There is a surprising amount of correlation between
BICEP2 and
Keck2013.
More than B2 vs Keck2012? That doesn't seem obvious to me...
Of course B2 x K2013rx3 and B2 x K2013rx4 will offer really compelling
tests. But as your text points out the E->B leakage is common, and is
certainly maximized for deproj all. Seems like any secure conclusions
about true B correlation may require E->B debiased 1d cross spectra, and
therefore sims, no?
John
On 8/27/13 3:25 PM, Sarah Stokes Kernasovskiy wrote:
Hi,
I've posted the Keck 2013 maps here:
http://bicep.caltech.edu/~spuder/keck_analysis_logbook/analysis/20130827_ke…
Keck2013 is currently at the Keck2012 noise levels (data through Aug
19th). There is a surprising amount of correlation between BICEP2 and
Keck2013.
-Sarah
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___________________________________________________________________
John Kovac jmkovac(a)cfa.harvard.edu
Associate Professor, Harvard University Astronomy Department
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
5:05 p.m.
Hi John/all,
That's right. Any secure conclusion would require Keck2013 sims. I think
it's pretty clear, though, that the jack0 is much larger than any of the
jackknives. Are you suggesting we make 2013 sims right now as well? That
would be a major effort.... (plus, we aren't quite there with cuts, etc)
The alt dk is quite interesting. We do seem to pass it (with no sims).
There doesn't seem to be enough sensitivity to say anything on a per-rx
basis - at least not from just looking at the 2d pager.
Clem - the more I stare at those maps, the more correlated they look. The
big, blue blobs at ra~-5 seem very much the same.
A quick note on sensitivity: the weather seems to be a lot worse this
year. Compare the elnod_median of
2012<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2012/fig_19.png…
elnod_median
of 2013<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2013/fig_19.png…ng>.
The abscals are only about 10% different. (the abscal is ~3000 uK/ADU for
anyone interested).
-Sarah
On Tue, Aug 27, 2013 at 1:10 PM, John Kovac <jmkovac(a)cfa.harvard.edu> wrote:
Wow, the Keck 2013 rx3 and rx4 maps look really good.
There is a surprising amount of correlation
between BICEP2 and
Keck2013.
More than B2 vs Keck2012? That doesn't seem obvious to me...
Of course B2 x K2013rx3 and B2 x K2013rx4 will offer really compelling
tests. But as your text points out the E->B leakage is common, and is
certainly maximized for deproj all. Seems like any secure conclusions
about true B correlation may require E->B debiased 1d cross spectra, and
therefore sims, no?
John
On 8/27/13 3:25 PM, Sarah Stokes Kernasovskiy wrote:
Hi,
I've posted the Keck 2013 maps here:
http://bicep.caltech.edu/~**spuder/keck_analysis_logbook/**
analysis/20130827_keck2013/<http://bicep.caltech.edu/%7Espuder/keck_anal…
Keck2013 is currently at the Keck2012 noise levels (data through Aug
19th). There is a surprising amount of correlation between BICEP2 and
Keck2013.
-Sarah
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https://lists.fas.harvard.edu/**mailman/listinfo/bicep2-list<https://lis…
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______________________________**______________________________**_______
John Kovac jmkovac(a)cfa.harvard.edu
Associate Professor, Harvard University Astronomy Department
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
6:05 p.m.
Hi Sarah,
Are you suggesting we make 2013 sims right now as
well?
I am not.
The maps are great. We can discuss in coming weeks whether we need to
make the effort on 2013 sims in the context of an initial
result--probably we all hope it won't be necessary, but we'll see and
debate. In the meantime, try not to stare too much at big blue blobs. :)
A quick note on sensitivity: the weather seems to be a
lot worse this
year. Compare the elnod_median of 2012
<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2012/fig_19.png> to
elnod_median of 2013
<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2013/fig_19.png>.
The abscals are only about 10% different. (the abscal is ~3000 uK/ADU
for anyone interested).
Do you mean that the shift in color scale here exceeds the 10% shift
that you expect from abscal change?
Can you quantify this claim?
thanks!
John
--
___________________________________________________________________
John Kovac jmkovac(a)cfa.harvard.edu
Associate Professor, Harvard University Astronomy Department
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
6:31 p.m.
Here are the zenith temperatures for Keck 2012 and 2013. We talked about
this a few weeks back when Colin plotted the data for BICEP1. I think
there was an action item for Grant to look at this and compare against his
atmospheric model. Anyways, 2012 does seem to have fewer of the 10-11 K_RJ
days. The median and the mean are about 4% warmer this year - not as large
as I thought it would be from the cutplots.
On Tue, Aug 27, 2013 at 3:05 PM, John Kovac <jmkovac(a)cfa.harvard.edu> wrote:
Hi Sarah,
Are you suggesting we make 2013 sims right now as
well?
I am not.
The maps are great. We can discuss in coming weeks whether we need to
make the effort on 2013 sims in the context of an initial result--probably
we all hope it won't be necessary, but we'll see and debate. In the
meantime, try not to stare too much at big blue blobs. :)
A quick note on sensitivity: the weather seems to be a lot worse this
year. Compare the elnod_median of 2012
<http://bicep.rc.fas.harvard.**edu/keck/reduc_plotcuts/2012/**fig_19.png<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2012/fig_19.png>>
to
elnod_median of 2013
<http://bicep.rc.fas.harvard.**edu/keck/reduc_plotcuts/2013/**fig_19.png<http://bicep.rc.fas.harvard.edu/keck/reduc_plotcuts/2013/fig_19.png>
Do you mean that the shift in color scale here exceeds the 10% shift that
you expect from abscal change?
Can you quantify this claim?
thanks!
John
--
______________________________**______________________________**_______
John Kovac jmkovac(a)cfa.harvard.edu
Associate Professor, Harvard University Astronomy Department
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
.
The abscals are only about 10% different. (the abscal is ~3000 uK/ADU
for anyone interested).
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days inactive
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