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Minutes of 2008-Nov-13 S5 QPipeline Review Teleconference

Attendance

Shourov Chatterji, Jonah Kanner, Isabel Leonor, Dave Reitze

Minutes by Isabel Leonor.

Announcements

Agenda

Minutes


* Announcement
 
  Dave:  Jolien has asked for report on review at one of the upcoming Burst 
         Review Telecons.  Dave told Jolien we are ready to sign off on review, 
         pending some things which need to be finished.  Dave does not think 
         completion of the written report should hold up things for S5y1 paper.  
         Jolien is okay with this.

* Documentation of H1H2 coherent transform pipeline

  Isabel:  Presented and went through the documentation of the 
           qcollocatedtransorm.m code.  This was something requested by Jonah to 
           make sure we understood what the H1H2 coherent transform pipeline was 
           doing.  The link to the documenation is:

  http://www.uoregon.edu/~ileonor/ligo/qreview/review/qcollocate.pdf

  Shourov:  Turns out that in code used for year 2 search, the coefficients for
            the components of the null and signal streams are the same as the
            coefficients used in the current code.  No negative energies result 
            in the year 2 code.

  All:  Need to absorb and think about the documenation some more.

  Dave: Thinks this can be checked off the to-do list.

* Post-processing scripts

  Dave:  Jonah still looking at segments and detect scripts.  Shourov says
         segments script is the same as segwizard.

  Jonah:  Still need to do simple reality checks.  Some more details to cover.

  Dave:  Detect is the thing that checks agains injections?

  Jonah:  Yes.

  Shourov:  Detect looks at list of injections and triggers.  Determines which
            injections have been seen.  There are four kinds of outputs.

  Dave:  Is there a table of missed injections?  Have you done that Shourov?

  Shourov:  I don't think so.

  Dave:  Is there an injection your should've seen and didn't?

  Shourov:  This can be done.  It will be interesting to do so.

  Dave:  You can say if they affect efficiencies.  Sounds like work, though.

  Shourov:  This would be beneficial to the burst group as a whole.  We can
            use measure of SNR relative to a baseline noise curve, and say here
            are high-SNR injections which were missed.  The reason might be, for
            example, that the injection is right at the edge of a segment.  Or
            there was a glitch.  Laura's notebook link has a table with
            -1, 0, +1 flags:

            # -1: this injection was not analysed (e.g., not in a science mode stretch); 
            # 0: this injection was analysed, but not detected (i.e., below threshold); 
            # +1: this injection was analysed and detected (i.e., above threshold)

  https://www.lsc-group.phys.uwm.edu/cgi-bin/bag-enote.pl?nb=burs5allsky&action=view&page=42

  Dave:  (To Jonah) Check of postprocessing scripts almost done.  You just need
         to convince yourself that you believe them.  Is this doable in two weeks?

  Jonah:  Yes.

* Revised sensitivity estimate

  Dave:  Jonah sent around revised estimate which shows worse agreement between
         back-of-the-envelope estimate and actual sensitivity.  The discrepancy
         is about 20% to 30%.  Isabel, this is okay with you?

  Isabel:  Yes, this is fine with me.

* Table of loud events

  Shourov sent out link to table of loud events:

  https://ldas-jobs.ligo.caltech.edu/~shourov/s5qreview/triggers/s5/box.html

  Dave:  Now sorted by correlated energy.  Check the outlier's (red dot) 
         correlated vs. coherent energies.

  Shourov went through first event in table as an example.

  Shourov:  This is low-frequency event.  Null stream not powerful enough in
            this case.  This is an H1-only glitch that the null stream was not
            able to get rid of.

  Dave:  Propose we all go through these and understand.

* Other remaining things to do

  Dave:  What about the plots Isabel requested?

  Shourov:  Possible to do this over next two weeks.

  Dave:  Also missed injection as a function of amplitude.

  Dave:  Review document.

* Dave:  Meet next week.  Week after next is Thanksgiving.  Will send out
         doodle poll to check common availability.

Action Items

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