Status of GEO burst analysis efforts Ik Siong Heng for the GEO - - PowerPoint PPT Presentation

Status of GEO burst analysis efforts

Ik Siong Heng for the GEO burst group

Outline

• Introduction
• who we are
• GEO’s S3 run
• S3 analysis
• goal: to have list of GEO S3 burst triggers available

ASAP

• have GEO++ implementation of TFClusters (not LAL

compliant)

• preparing to use TFClusters and Excess Power

pipelines

Introduction

• There are about 5 core members of the GEO

burst group

• Current task is to analyse data acquired by

GEO600 during S3

• GEO600 was running from 5th to 12th of November
• duty cycle was 95.2%
• Chosen to use TFClusters (LDAS) and Excess

Power (lalapps) pipeline

Typical sensitivity for GEO S3 first week run Sensitivity has improved since!!

Issues for S3

• using Burst DSO to run TFClusters
• get data to CIT and visible for LDAS done for GEO S1

data

• perform injections, hardware and software
• Also going to run Excess Power
• installed on a machine in Cardiff
• Already have HACR pipeline but not LAL compliant
• HACR is GEO++ implementation of TFClusters (with some

minor differences)

• produces GEO triggers for S1

Data issues

• GEO S3 data will be transferred to CIT
• Steffen Grunewald (AEI) and David Churches

(Cardiff) are contact poits for GEO data transfer

• GEO S1 data has already been transfer to Caltech
• might use LDR if stable, otherwise, rsync
• waiting for h(t) to be generated
• calibrated h(t) is in double precision (LAL: single

precision)

TFClusters pipeline

• I.S. Heng visited Caltech to work with Julien

Sylvestre on running TFClusters on GEO data

• Some success:
• have run TFClusters on GEO S1 data
• cast S1 data into single precision
• performed injections and determined efficiency
• GEO S3 data will be in the same format
• ready to start processing GEO S3 data

TFClusters pipeline test

inject sine gaussians into S1 data, f0 from 0.5 to 3 kHz, from hpeak 10-15 to 10-18, 10 injections at amplitude per 300 second segment 50% efficiency (threshold level) GEO S1 noise curve 10-17 10-20 103

h/√Hz

Excess Power pipeline

• lalapps excess power code built on a machine in

Cardiff (explorer)

• Carlo Nicola Colacino and I.S. Heng visited UWM

to work with Patrick Brady and Saikat Ray Majumder

• successfully cast GEO h(t) data (double precision)

into a single precision number

• high pass filter with LAL functions to reduce dynamic

range of data because casting into single precision

• ready to start processing GEO S3 data

Excess Power pipeline

without high pass filtering (double precision) with LAL high pass filtering (single precision) 10-22 10-20 10-18 10-16 10-14

h/√Hz

103

Hardware injections

• Martin Hewitson and Harry Ward have been

upgrading hardware

• I.S. Heng has changed Inspiral injection software

to inject Burst waveforms (sine gaussians)

• We are aiming to co-ordinate at least 1 set of

injections with LIGO detectors

• Ken Strain is the contact point on this co-ordination

Vetoes

• R. Balasubramanian is in charge of running

GEO++ monitors to for veto investigations

• GlitchMon
• PowerTracker
• LineTrackerMon
• HACR
• Started looking at GlitchMon and PowerTracker
• gives an impression of glitch statistics of data

Multi-detector analysis

• GEO600 has different sensitivity band (sweet spot)

and orientation from LIGO detectors

• Orientation issues
• coincidence windows
• amplitude cuts
• Sensitivity band issues
• frequency cuts
• Perform Monte Carlo simulations to get some

answers

Summary and discussion

• GEO burst group is focused towards analysing S3

data

• Two LAL compliant pipelines, TFClusters and

Excess Power, are ready to process GEO S3 data

• Many interesting and critical issues for multi-

detector analysis need to be addressed