Bicep2-list September 2013

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16 participants
49 discussions

BICEP2 / Keck telecon tomorrow (20 Aug 2013) noon Eastern

by John Kovac

Hi all, We will have our BICEP2 / Keck CMB analysis telecon tomorrow at the usual time: Tues, 20 Aug 2013 - 12:00 Eastern, 11:00 Central, 9:00 am Pacific 1-866-890-3820 (toll: 1-334-323-7229) Passcode: 59702175# Starting this week, we will begin promptly after the hour and cap the telecon at 2:30 max. Please send an email when you put up any posting giving a brief summary and noting if it needs to be discussed on the telecon. New postings must be up by 7am eastern to be discussed this week. Here's tomorrow's agenda in brief: 1) Papers - Paper I: Instrument paper, updates since last week? [ Walt ] - Paper II: Beams paper, detailed status report [ Abby ] http://bmode.caltech.edu/~bicep2/papers/2013_beams/ - timeline on assigned tasks, status of unassigned tasks 2) Computing and simsets - odyssey / general computing report: [ Walt ] - odyssey changes - panlfs usage - sim 1450 progress report [ Stefan ] - timelines to: reduc_final pager, 50 rlz 3) Postings [ Clem out so John to lead this week... ] 4) Other initial-result-critical analysis tasks [ John to lead ] - What tasks need effort? Can we assign it? - “steady” crosstalk -- quantify from beammaps and then sim - “variable” crosstalk -- what’s the path to constraining? - sidelobe sim / spherical convolution implementation [ Sergi ] - composite sidelobe maps - B1 x B2 Full agenda is in the telecon notes here http://goo.gl/LNvpx Add any more items you want discussed there before the telecon. John

10 years, 6 months

Posting: DSL mast history and visibility in CMB data

by Walt Ogburn

In searching for satellite contamination in the CMB data, I keep finding another time-varying source of large az-fixed signal: the DSL mast. This has been raised and lowered at various times for summer calibrations. I haven't found a clear record of when exactly it was up, so I've tried to reconstruct it as well as I can from various logs. We could consider cutting the affected tags. It's certainly necessary to exclude them for further studies of the satcom signal. http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20130927_dsl_ma… - Walt

10 years, 7 months

Posting: Satcom sensitivity in Keck

by Sarah Stokes Kernasovskiy

Hi, I put up a posting with the satcom sensitivity numbers for Keck that Walt had made for BICEP2. http://bicep.caltech.edu/~spuder/keck_analysis_logbook/analysis/20130925_sa… There are a couple of CSV files linked with the numbers for 2012 and 2013 that could be used for an exclusion or jackknife test. Also, I showed that some dark channels see the signal as well. An alternate route we could take is to make dark detector maps and use that to put an upper limit on how much B signal could come from it. Calibrating the maps correctly would be a little tricky, but at least they wouldn't have any CMB confusing things. -Sarah

10 years, 7 months

Posting: satcom sensitive channels

by Walt Ogburn

http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20130917_satcom… The main point of this posting is a CSV file with a figure of sensitivity for each channel. This is open to use by the group for constructing exclusion tests, jackknifes, comparisons with detector parameters, buying lotto tickets, etc. - Walt

10 years, 7 months

Posting: Per-pair galactic maps 2

by Walt Ogburn

http://bicep0.caltech.edu/~spuder/analysis_logbook/analysis/20130919_gal_po… I have made improved per-pair galactic maps for BICEP2. These have a reduced tag list that should be free of the satcom signal, and they also include a relgain mismatch subtraction similar to deprojection. These remove many of the oddities from the previous note [20130909_gal_polrot_1]. However, some shadow-like features remain. The remaining map coverage is small enough that I have doubts about being able to extract per-pair polarization angles or do per-pair pol angle consistency checks. - Walt

10 years, 7 months

New Analysis Posting: Hamimeche-Lewis Likelihood for BICEP2 and Keck

by Immanuel Buder

I put up a posting on implementing the Hamimeche-Lewis likelihood approximation for BICEP2 and Keck: http://bmode.caltech.edu/~spuder/analysis_logbook/analysis/20130923_hl_like… I show some likelihood curves and central value/upper limit constraints on r from sims. The median upper limit from BICEP2 (auto) sims with relgain+diffpoint+ellipticity deprojection is r < 0.13 (but these sims assume r=0). I propose we discuss it briefly on the telecon. Immanuel Buder Postdoctoral Fellow Harvard-Smithsonian Center for Astrophysics (office) 160 Concord Ave., M-114C (office) 617 495 7567 (mail) 60 Garden St. MS 42 Cambridge, MA 02138 ibuder(a)cfa.harvard.edu

10 years, 7 months

Yukical Dielectric Sheet, HR10

by bullock＠physics.umn.edu

Hello, As most of you know, we are making a version of the Yukical at Minnesota for Keck. I was wondering if anyone still had a roll of the dielectric film that was used for BICEP/BICEP2's Yukical. If so, could you please send it to Minnesota? Also, does anyone have extra HR-10? I estimate that we will need 6 of the 24" x 24" x 0.4" sheets. Thank you, Eric

10 years, 7 months

Posting: ASC. Some images.

by Sergi R. Hildebrandt

Hello All, I have posted some figures all-sky convolution method in http://bicep.caltech.edu/~spuder/analysis_logbook/analysis/20130924_conv_2/ Clem, B/W rocks, and if I had to choose, I would certainly choose the second B2 map from my posting. No referee could resist it even if B/W :) -- Dr Sergi Hildebrandt Rafels Jet Propulsion Laboratory ---------------- California Institute of Technology 169-217 Cahill-383 4800 Oak Grove Drive 1200, E. California Bvd Pasadena, CA, 91109 Pasadena, CA, 91125 MC/169-237 MC/367-17 1-818-354-0220 1-626-395-2147

10 years, 7 months

Posting: Jackknife spectra and relgain mismatch in beam map sims

by Chin Lin Wong

Hi I've posted a note on work that is currently in progress on trying to understand the jackknife spectra for the beam map sims at high ell, as well as work trying to understand what happens when we add relgain mismatch into the beam map sims. I do this by going back to the constructed beam maps with added noise, and compare them to what we see in the beam map sims. http://bmode.caltech.edu/~spuder/analysis_logbook/analysis/20130923_composi… Chin Lin

10 years, 7 months

New Analysis Posting: Calculations for Beam Mapping in Spherical Coordinates

by Immanuel Buder

I put up a new posting on coordinate system definitions and calculations for beam mapping (especially far sidelobes): http://bmode.caltech.edu/~spuder/analysis_logbook/analysis/20130923_sidelob… There's no science result here; it's purely definitions and coordinate calculations. I propose we not discuss it tomorrow. Instead, people should read it offline and send me comments and questions. If there are any we cannot resolve by email, I propose we discuss those only on next week's telecon. 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)gmail.com <ibuder(a)cfa.harvard.edu>

10 years, 7 months

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Bicep2-list September 2013