S5 First Epoch
BNS Inspiral Results
Drew Keppel1
representing the Inspiral Group
1California
Institute of Technology
Nov LSC Meeting
MIT, 4 November 2006
LIGO-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 ρ = 8
First S5 Epoch
Nov 4, 2005 Feb 6, 2006
current target
sensitivity shown
in sensemon
2k
4k
Parameter Accuracy
of recovered software injections
• Mchirp accuracy: 0.01 M sun
• End time accuracy: 5 ms
Accidental Coincidences
and 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
–
–
•
χ2 waveform consistency test
χ2 time above threshold veto
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
•
All vetoed injections above
coincide with glitches.
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
•All triggers consistent with background
Signal with SNR 8 in H1 and L1 detectors would appear here
Upper Limit
• Gaussian Mass Distribution
» centered around 1.35 M
» Luminosity for H1H2L1 times:
» Upper Limit:
177 L10
0.17 L10-1 yr-1
• Uniform Mass Distribution
» Luminosity for H1H2L1 times:
–
–
–
–
2-3 M:
3-4 M:
4-5 M:
5-6 M:
• 1 MWEG = 1.7 L10,B
» Switched to L10’s because of error in MWEG
155 L10
294 L10
499 L10
1077 L10
Mass Dependent
Upper Limit
Rate L10-1 yr-1
S2
0.19
S3/S4
0.11
0.06
Total Mass M
0.03
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