Hi all,
A reminder of our first BICEP2 team meeting of the new year, back at our
usual time today:
Tuesday 8 Jan 2013
9:00 am Pacific, 12:00 eastern, 6:00am Pole
Phone: 1-866-890-3820 (toll: 1-334-323-7229) Passcode:59702175
As the agenda below reflects, I expect we will have a very limited
pipeline discussion today. Walt, can you please take notes?
1) General business:
- online logbook updated for Nov/Dec? [Jon, Colin, …]
- status of getting B2 summer data onto odyssey [Walt, Colin]
- votes on telecon time for next 5 weeks: 9am or 11am Pacific?
2) Organizing efforts toward results:
BICEP2 operations are complete. We'll be reorienting these meetings
toward organizing our efforts to produce and publish results. As we
discussed in our last (28 Dec) meeting, we'll be starting to match
individuals with assignments for "final reports" on B2 sub-threads on
reduction and instrument characterization. These are an evolution of
the threads we started outlining in November.
On the B2 analysis call today Walt volunteered to start a separate index
page for these reports, which we see as roughly mapping into sections of
papers. Proposed guidelines:
1. unlike logbook postings, these documents get edited and updated
until we publish
2. each report connects the topic to what is needed for the B2
science results--what final numbers or tests are needed, and why.
3. review past experiments experience, esp. B1 approach
4. provide an overview of tasks remaining
5. summarize (with links) work done in postings, and where
appropriate summarize the existing B2 data.
6. Format can be either html or google doc. Authors should seek and
incorporate all group feedback to converge on a consensus doc, ready to
extract conclusions for publication.
Example report topics:
- thermal systematics
- magnetic systematics
- spectral response
- temporal transfer function
- RPS-derived polarization chi's and epsilons
- pol cal consistency checks from Yukical / pixel polrasters
- far sidelobes
...
To drive this forward we need your buy-in both on format and
assignments. Thread coordinators, please think about topics within your
threads that need reports. Those who can't join tomorrow, send feedback
and/or offers to take assignments.
Today we'll agree on format, organization of topics under threads,
and initial assignments. Walt will continue this process on next
Tuesday's meeting (I'll be in transit). For future meetings I hope we
can schedule reviews of specific reports.
3) B-spectrum Pipeline
limited attendance expected today
brief update on data reduction [Walt, Angiola]
brief update from Jamie T on few degree sidelobes T->P sims
(Jamie=monopole, Chris=quadrupole)
other updates from ongoing work
4) AOB
--
___________________________________________________________________
John Kovac jmkovac(a)cfa.harvard.edu
Assistant Professor, Astronomy and Physics, Harvard University
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
We copied the contents of bicep30 and bicep33 to
odyssey:/n/bicepfs1/bicep2/2013_polebackups
Please treat these as read-only. Let me know if you think something is
missing. Note that symlinks to e.g. /export won't work because everything
is under 2013_polebackups, but if you convert absolute paths to relative
paths the files should be there.
Thanks to Doug Muhlestein for doing a lot of hard work with RAID
controllers to make this happen.
Immanuel Buder
Postdoctoral Fellow
Harvard-Smithsonian Center for Astrophysics
(office) 617 495 7567
(office) 160 Concord Ave., M-114C
(mail) 60 Garden St. MS 42
Cambridge, MA 02138
ibuder(a)cfa.harvard.edu
Hi Immanuel,
OK - I wasn't really making a proposal - just trying to understand what you
were proposing.
> So for a jackknife I propose (B2_1 - B2_2) x (Keck_1 - Keck_2).
But don't we expect this to be clean given that we already think (B2_1 - B2_2)
x (B2_1 - B2_2) and (Keck_1 - Keck_2) x (Keck_1 - Keck_2) are clean? Is the
thinking that by getting rid of noise bias (squared) terms other things may be
easier to see?
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
**********************************************************************
Dear all,
On the pipeline telecon today we reached some decisions which the whole group
should be given an opportunity to comment on.
Background:
Posting like this one:
http://bicep.caltech.edu/~spuder/analysis_logbook/analysis/20121120_sim1234…
showed that B2 2yr data shows no strong jackknife failures in E and B spectra.
We therefore looked at the real BB 2d power spectrum where we saw "lots of
power in excess of what signal+noise sims show". (One can see this in the
"maps pager" of the above link.)
We would regard this signal as real (cosmology or foreground) except that it
is smaller and/or different in each of the 2012 Keck single rx maps. See this
pager:
http://bicep.caltech.edu/~spuder/analysis_logbook/analysis/20130226_b2_keck…
k
We have searched without success to find a jackknife which fails - for which
the contamination appears to be significantly different in the two halves of
the split. We have also searched for a systematic which might cause this
signal by simulating candidates and making trials of deprojecting them -
without success so far.
We find ourselves in an unfortunate situation. Without understanding where the
false signal comes from any result we can pull out of any of our receivers can
honestly be treated as an upper limit only. We therefore must continue
pursuing such an understanding. However we are also strongly motivated to
publish something asap - at this point we must consider such an upper limit
only publication. There are thorny "political" issues as to which is the least
bad option for such a publication.
Proposed actions:
- We have deliberately held off from answering the question "What is the r
value corresponding to our nominal B2 detection and what is it's
significance?". We propose to now do so. Chris will add the real BB points to
the "chi2 pager" in the first link above and compare to r=0.1 sims.
- We will take simple cross spectra between the B2 3yr and 2012 Keck single rx
maps. In so much as these are unbiased by correlated noise or systematic
contamination they will scatter about zero. This is a speculative first step
which might lead to an alternate path to publication.
- We will run conventional sims identical to those already run for B2 2yr for
2012 Keck rx0 only. This receiver shows no strong nominal signal and can be
expected to yield a non-detection with a sensitivity a few times worse than
B2. This might be a possible path to a "stand alone" although rather lame
paper.
--
**********************************************************************
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 Immanuel,
> One suggestion here is to run jackknives of the cross spectra
What specifically do you mean? For us jackknife usually means make two subset
maps, difference them, and then take spectra of the difference map. Do you
mean take for a given 1,2 subset split take B2_1-Keck_2 and cross with
B2_2-Keck_1? Or something different?...
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
**********************************************************************
----- Forwarded Message -----
Date: Fri, 22 Mar 2013 13:38:45 +0900
From: 羽澄 昌史 <masashi.hazumi(a)kek.jp>
To: collaboration QUIET <quiet_collaboration(a)cosmo.uchicago.edu>
Subject: [Quiet_collaboration] CMB2013 conference (June 10-14, 2013,
Okinawa, Japan)
Dear QUIET collaborators,
We plan to have an international conference on CMB
from June 10 to 14, 2013 in Okinawa, Japan.
Attached please find the second circular.
Registration can be made from the conference web page
http://www-conf.kek.jp/cmb/2013/
Your participation is very welcome.
Please also feel free to forward this message to
anybody who might be interested.
Best,
Masashi
#########################################################
CMB2013 - International Conference on Cosmic Microwave Background
June 10 - 14, 2013, Okinawa, Japan
#########################################################
Overview:
Detection of primordial gravitational waves would be one of the most
significant scientific discoveries of all time. Such a detection would
be a direct evidence for inflation and shed light on fundamental physics
such as quantum gravity behind inflation. The accurate measurement
of CMB polarization is the best way to discover the primordial
gravitational waves. It is thus one of the greatest challenges in
experimental cosmology in the next decade. Thanks to remarkable
technological development in recent years, the detection is not a mere
dream anymore but becoming factual.
The primary objective of the conference is to exchange ideas on how to
reach the precision at the level of r=0.001 or even better, where r is
the tensor-to-scalar ratio. Another important goal of the conference is
to evaluate scientific values of such a measurement, where relations to
other observations such as CMB temperature anisotropies are also
important. To these ends, the conference will have talks from all the
CMB projects in operation, in preparation or in planning.
Program:
The conference consists of plenary sessions and poster sessions.
Topics in the plenary sessions will include the following:
- Planck results/instruments
- WMAP9
- On-going ground/balloon CMB experiments
- CMB experiments in preparation
- Future CMB experiments including satellites
- Theory overviews
- Nature of foregrounds and their separation
Talks in the plenary sessions are by invitation only.
Poster sessions will be based on abstract submissions to
cover a broad range of topics on CMB research, from inflationary
model building to superconducting sensor development,
which will stimulate vigorous and open discussions among participants.
Posters on a wider range of topics related to CMB are also welcomed;
examples of such topics are:
- Synergy between CMB and other observations,
such as CIRB, 21cm, dark energy and dark matter.
- Astrophysics/astronomy with foregrounds.
Invited speakers so far confirmed include
Kam Arnold, Mark Devlin, Clive Dickinson, Douglas Finkbiner,
Dale Fixsen, Yasuo Fukui, Ricardo Genova-Santos, Thijs de Graauw,
Al Kogut, Eiichiro Komatsu, Akito Kusaka, Chao-Lin Kuo,
David Larson, Adrian Lee, Tobias Marriage,
Francesco Piacentini, Suzanne Staggs,
Mathieu Tristram, Jun'ichi Yokoyama,
Venue:
Okinawa Institute of Science and Technology Graduate University (OIST),
Onna-son, Okinawa, Japan (http://www.oist.jp/).
Okinawa is a beautiful tropical island and is the primary resort
vacation destination in Japan. Travel on Okinawa is extremely
safe as is the case on mainland Japan.
Tourists can enjoy an ancient culture with 9 world heritage sites,
a strong crafts tradition in ceramics, textiles, and glass, a lively
contemporary music scene, breathtaking empty beaches
and crowded old world market places.
Web:
http://www-conf.kek.jp/cmb/2013/
SOC:
George Efstathiou (University of Cambridge),
Masashi Hazumi (High Energy Accelerator Research Organization (KEK),
Chair),
Eiichiro Komatsu (Max Planck Institute for Astrophysics),
Stephan Meyer (University of Chicago),
Naoshi Sugiyama (Nagoya University)
LOC:
Makoto Hattori (Tohoku University),
Masashi Hazumi(KEK, Chair),
Hideo Kodama (KEK),
Shuji Matsuura (Japan Aerospace Exploration Agency (JAXA)),
Chiko Otani (RIKEN),
Yutaro Sekimoto (National Astronomical Observatory of Japan (NAOJ))
Osamu Tajima (KEK)
Supported by:
MEXT Grant-in-Aid for Scientific Research on Innovative Areas
KEK
RIKEN
OIST
- - - - - - - - - - - - - - - - - - - -
Masashi Hazumi
Institute of Particle and Nuclear Studies (IPNS),
High Energy Accelerator Research Organization (KEK)
1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
Office: Building 4, Room 403
TEL: +81-29-864-5339 (office direct)
PHS: +81-29-864-5200 ex4525
FAX: +81-29-864-5341
email: masashi.hazumi(a)kek.jp
Web: http://research.kek.jp/people/hazumi/
- - - - - - - - - - - - - - - - - - - -
_______________________________________________
Quiet_collaboration mailing list
Quiet_collaboration(a)cosmo.uchicago.edu
https://cosmo.uchicago.edu/mailman/listinfo/quiet_collaboration
-------- Original Message --------
Subject: Link to Far Sidelobe Roundup
Date: Mon, 18 Mar 2013 18:12:14 -0400
From: Abigail Vieregg <avieregg(a)cfa.harvard.edu>
To: John Kovac <jmkovac(a)cfa.harvard.edu>, Immanuel Buder
<ibuder(a)cfa.harvard.edu>
Hi John,
Here's a link to the draft of the report Immanuel and I have been working on:
http://bmode.caltech.edu/~bicep2/papers/2013_firstresult/far_sidelobes/
Abby
Hi all,
We've firmed up the schedule for this spring's Keck and BICEP2
collaboration meetings, to be held at Harvard:
April 17: BICEP2
April 18: BICEP2 / Keck (analysis)
April 19: Keck (operations / fab / deployment planning)
We will aim to finish by 3:30pm on Friday April 19, for those who want
to catch evening flights.
*People can start booking flights now*. Irene and I will be posting
more information soon, including a link to a Doodle poll for RSVP's,
hotel information, and more detailed draft schedule.
John
--
___________________________________________________________________
John Kovac jmkovac(a)cfa.harvard.edu
Assistant Professor, Astronomy and Physics, Harvard University
160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
Chao-Lin
----- Forwarded Message -----
From: "Chao-Lin Kuo" <clkuo(a)stanford.edu>
To: "John Kovac" <jmkovac(a)cfa.harvard.edu>
Cc: "bispud-pipeline-list" <bispud-pipeline-list(a)lists.fas.harvard.edu>
Sent: Friday, March 8, 2013 10:45:32 PM
Subject: Re: [Bispud-pipeline-list] Toy model for negative TQ
The toy model should obviously be replaced by the more appropriate
radiation transfer analysis in this paper. But just to set the
record straight the model now looks like the attached cartoon.
The original one had two sign errors (that cancel) and one spelling
error.
Chao-Lin
----- Original Message -----
>
> This is the Italian paper we made reference to on the telecon today.
>
> http://www.sat.ltu.se/members/viju/publication/cmb/mnr_11464.pdf
>
> I remain skeptical that this effect could produce a signal that
> evades
> temporal jackknives, but I strongly encourage people to think about
> it.
>
> Regardless, this could be the explanation for the large-scale average
> polarization signal that appears to align with the prevailing wind.
> Exploring this signal in B1, B2, and Keck could certainly be
> scientifically interesting (i.e. eventually publishable) on its own
> merits, even if it isn't the problem we're dealing with in B2.
>
> J
>
>
> On 3/5/13 6:39 PM, Chao-Lin Kuo wrote:
> >> Negative TQ seems strong and convincing to me. Like I said in
> >> the telecon I don't think it is consistent with ground screen
> >> reflections
> >> though. The sky signal reflected into the telescope is not visible
> >> to
> >> the main beam so why would there be any correlation, positive or
> >> negative?
> > Ok, If the reflected signal generates T , which is then polarized
> > by the ground screen, that could generate a TQ. Sarah is reading
> > through Denis' thesis to see whether this has the right sign.
> >
> >
> >
> >
> >> However if a big blob of cloud at low elevation intercepts the
> >> far side lobe, it could introduce both a T signal and a Q signal
> >> that
> >> would be anti-correlated. See the attached cartoon.
> >>
> >> This can also break the positive-negative symmetry: most clouds
> >> have
> >> crystals align vertically. So there is no fluctuation to 'cancel'
> >> the
> >> negative correlation.
> >>
> >> Looking at
> >>
> >> http://bmode.caltech.edu/~spuder/analysis_logbook/analysis/20130304_azmaps/
> >>
> >> section 3, we know the negative correlation isn't perfect though,
> >> before
> >> ground subtraction.
> >>
> >> Chao-Lin
> >>
> >>
> >> <TQ_from_cloud.gif>
> >> _______________________________________________
> >> Bispud-pipeline-list mailing list
> >> Bispud-pipeline-list(a)lists.fas.harvard.edu
> >> https://lists.fas.harvard.edu/mailman/listinfo/bispud-pipeline-list
> > _______________________________________________
> > Bispud-pipeline-list mailing list
> > Bispud-pipeline-list(a)lists.fas.harvard.edu
> > https://lists.fas.harvard.edu/mailman/listinfo/bispud-pipeline-list
>
>
> --
> ___________________________________________________________________
> John Kovac jmkovac(a)cfa.harvard.edu
>
> Assistant Professor, Astronomy and Physics, Harvard University
> 160 Concord Ave rm 310, Cambridge MA 02138, 617-496-0611
>
>
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