S5 First Epoch BNS Inspiral Results
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Transcript of S5 First Epoch BNS Inspiral Results
S5 First EpochBNS Inspiral Results
Drew Keppel1
representing the Inspiral Group
1California Institute of Technology
Nov LSC MeetingMIT, 4 November 2006LIGO-G060556-00-Z
Summary
• Start of run (11/4/05) to start of LHO commissioning (02/06/06)
• Standard 1 - 3 M 2pN inspiral templates
• Search pipeline (filter, vetoes, coincidence)• Full Data Results
» No detection
• Upper Limit» 0.17 L10
-1 yr-1 for 1.35 M
» Mass dependent
• Future plans
S5 First Epoch BNS Analysis
Distance to optimally oriented 1.4,1.4 M BNS at = 8
First S5 EpochNov 4, 2005 -Feb 6, 2006
current target
sensitivity shown in sensemon
2k
4k
Parameter Accuracyof recovered software injections
• Mchirp accuracy: 0.01 M sun• End time accuracy: 5 ms
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
Vetoes
• Two types of Vetoes are used to eliminate false triggers» Data Quality Vetoes» Signal-Based Vetoes
2 waveform consistency test 2 time above threshold veto
• All vetoed injections above coincide with glitches.
• Data Quality Vetoes: categorized» Cat. 1
– Data not analyzed– H1:H2_OUT_OF_LOCK
» Cat. 2 & 3– Triggers discarded– MASTER_OVERFLOW_LSC– PRE_LOCKLOSS_120_SEC
H1H2 Amplitude Consistency
• Effective Distance Cut» For triggers with both H1 and H2 triggers
• Consistency Cut» For triggers with one Hanford trigger when both were in science mode
H1H2 Effective Distance Cut
Efficiency Curve
• 50% efficiency at 25 Mpc
Population Model
• The galaxy catalog has been extended to 100 Mpc» only complete to 25 Mpc» we are now sensitive to
those distances» The upper limit has used a
catalog extended to 75 Mpc
S5 Epoch 1 Full Data
Signal with SNR 8 in H1 and L1 detectors would appear here
•All triggers consistent with background
Upper Limit
• Gaussian Mass Distribution» centered around 1.35 M
» Luminosity for H1H2L1 times: 177 L10
» Upper Limit: 0.17 L10-1 yr-1
• Uniform Mass Distribution» Luminosity for H1H2L1 times:
– 2-3 M: 155 L10
– 3-4 M: 294 L10
– 4-5 M: 499 L10
– 5-6 M: 1077 L10
• 1 MWEG = 1.7 L10,B
» Switched to L10’s because of error in MWEG
Mass DependentUpper Limit
Total Mass M
Rate L10-1 yr-1
S2
S3/S40.190.11
0.060.03
Future for S5 BNS
• Follow up of loudest events in First Epoch• Adding Coherent Code to Pipeline
• Post-Newtonian search from 2 to ~30 Total M from 1 calendar year of S5 data» Goal is a result presented at March LSC Meeting 2007
The End