Results from LIGO Searches for Binary Inspiral Gravitational Waves Peter Shawhan
S5 BNS Inspiral Update Duncan Brown Caltech LIGO-G060265-00-Z.
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Transcript of S5 BNS Inspiral Update Duncan Brown Caltech LIGO-G060265-00-Z.
![Page 1: S5 BNS Inspiral Update Duncan Brown Caltech LIGO-G060265-00-Z.](https://reader033.fdocuments.us/reader033/viewer/2022051417/5697bfe81a28abf838cb63ab/html5/thumbnails/1.jpg)
S5 BNS Inspiral Update
Duncan BrownCaltech
LIGO-G060265-00-Z
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Introduction
• Talk divided into two parts:
• S5 Online Analysis» Runs all the time at LHO and LLO
» Single detector search, only generates trigger SNR
» Displayed by InspiralMon and daily glitch pages
• S5 First Epoch BNS search» Start of run (11/4/05) to start of LHO commissioning (02/06/06)
» Standard 1 - 3 Msun 2pN inspiral templates
» Full search pipeline (filter, signal based vetoes, coincidence)
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S5 Online Analysis
• Runs with latency ~ 20 mins at LHO and LLO• Results displayed in control room via InspiralMon
• Not much to say…• Other than the occasional brief downtime, this has been running well
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S5 BNS Glitch Pages
• Display top 10 loudest single IFO triggers with SNR > 25
Triggers with noknown DQ flag
Triggers withknown DQ flag
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S5 BNS Glitch Pages
• Scimons encouraged to look at glitches with no current DQ explanation» Glitch group have been working with these triggers
• Experts encouraged to create DQ flags for glitches that are “obvious” but are not currently flagged
• To do:» Time cluster triggers with 10 sec window (real soon now!)
» Random sampling of triggers in SNR range 6 - 25 for scimons and glitch group to follow up
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S5 Hardware Injection Analysis
• Script that looks at hardware injections using online triggers (Fairhurst)
Currently run by hand. Plan is to automate generation
and add to scimon checklist
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S5 First Epoch Analysis
Distance to optimally oriented 1.4,1.4 solar mass BNS at = 8
First S5 EpochNov 4, 2005 -Feb 6, 2006
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S5 Accidental Coincidencesand Simulated Signals
• Tune pipeline using background, playground (10% of data) and injections• Measure background by applying time slides before coincidence• Add simulated signals to detector data to evaluate analysis performance
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Efficiency in Triple Coincident Data
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Efficiency in Triple Coincident Data
These are injections found as H1H2 double coincidence,
but which have a large effective distance in LLO
(due to detector misalignment)
Apparent structurehere due to low number statistics
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Histogram of Number of Galaxies
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Histogram of Number of Galaxies
Current galaxy catalogruns out at 25 Mpc:
This should keep going up(needs to be fixed for S5)
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Ball Park of S5 Epoch 1 Result
• Doing final tuning of vetoes before opening box» Group has been busy closing out S3/4 analyses…
• Total time in triple coincident data ~ 0.1 years
• The total luminosity ~ 300 L10 = 190 MWEG
• R90% ~ 0.08 yr-1 L10-1 = 0.13 yr-1 MWEG-1
• But would not quote this number outside this room…» Galaxy distribution incomplete (limit will go down)
» Efficiency computed at threshold, not loudest event (limit will go up)
» No consideration of background, errors, etc.
» Not reviewed!
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Future for S5 BNS
• Complete S5 first epoch upper limit (or detection?) for approval at August LSC meeting
• At August LSC meeting we will have S5 second epoch (end of LHO commissioning to start of LLO commissioning) in same state first epoch is now
• Setting up automated code to analyze data for BNS weekly for a detection/no detection statement
• Detection or final upper limit at end of S5…?