LIGO Document G0900556-v4 A search for gravitational waves from Cassiopeia A using LIGO S5 data Karl Wette Centre for Gravitational Physics The Australian.

Slides:

Advertisements

Similar presentations

A walk through some statistic details of LSC results.

Advertisements

GWDAW 11 - Potsdam, 19/12/ Coincidence analysis between periodic source candidates in C6 and C7 Virgo data C.Palomba (INFN Roma) for the Virgo Collaboration.

LIGO-G Z Beating the spin-down limit on gravitational wave emission from the Crab pulsar Michael Landry LIGO Hanford Observatory for the LIGO.

Broadband Search for Continuous-Wave Gravitation Radiation with LIGO Vladimir Dergachev (University of Michigan) LIGO Scientific Collaboration APS meeting,

Searches for continuous gravitational waves with LIGO and GEO600 M. Landry for the LIGO Scientific Collaboration LIGO Hanford Observatory, Richland WA.

LIGO Status and Advanced LIGO Plans Barry C Barish OSTP 1-Dec-04.

LIGO-G Z how to find gravity waves with your home PC Michael Landry LIGO Hanford Observatory California Institute of Technology.

November 2, 2006LIGO / pulsar workshop1 How LIGO searches are affected by theory & astronomical observations Ben Owen.

The search for continuous gravitational waves: analyses from LIGO’s second science run Michael Landry LIGO Hanford Observatory on behalf of the LIGO.

Gravitational Wave Detectors: new eyes for physics and astronomy Gabriela González Department of Physics and Astronomy Louisiana State University.

LIGO-G W Gregory Mendell, LIGO Hanford Observatory on behalf of the LIGO Scientific Collaboration Stackslide search for continuous gravitational.

LIGO-G Z A directed search for gravitational waves from Cassiopeia A Karl Wette for the LIGO Scientific Collaboration Amaldi 2007, Sydney, Australia.

GWDAW /12/161 Activities of the LIGO Scientific Collaboration’s Continuous Wave Group Xavier Siemens for the LSC University of Wisconsin -- Milwaukee.

Alicia M. Sintes Universitat de les Illes Balears Paris,17 November 2006 Current searches for continuous gravitational waves.

Status of LIGO Data Analysis Gabriela González Department of Physics and Astronomy Louisiana State University for the LIGO Scientific Collaboration Dec.

Searching for gravitational radiation from Scorpius X-1: Limits from the second LIGO science run Alberto Vecchio on behalf of the LIGO Scientific Collaboration.

Why LIGO results are already interesting Ben Owen Penn State May 24, 2007Northwestern U.

LIGO- G D Status of LIGO Stan Whitcomb ACIGA Workshop 21 April 2004.

RAS National Astronomy Meeting, Queens University, Belfast Gravitational wave astrophysics: Are we there yet? Matthew Pitkin for the LIGO Scientific Collaboration.

LIGO-G Z Peter Shawhan, for the LIGO Scientific Collaboration APS Meeting April 25, 2006 Search for Gravitational Wave Bursts in Data from the.

LIGO-G Z GWDAW10, December 16, S3 Final Results Bruce Allen, for the LIGO Scientific Collaboration.

GWDAW - Annecy December 17 th 2004 LIGO-G Z1 Searching for gravitational waves from known pulsars Matthew Pitkin for the LIGO Scientific Collaboration.

GWDAW-8 December 18, 2003LIGO Scientific Collaboration, UW - Milwaukee 1LIGO-G Z Broad-band CW searches (for isolated pulsars) in LIGO and GEO.

15 Dec 2005GWDAW 10 LIGO-G Z1 Overview of LIGO Scientific Collaboration Inspiral Searches Alexander Dietz Louisiana State University for the LIGO.

Searching for Gravitational Waves from Binary Inspirals with LIGO Duncan Brown University of Wisconsin-Milwaukee for the LIGO Scientific Collaboration.

LIGO-G Z LIGO Observational Results I Patrick Brady University of Wisconsin-Milwaukee on behalf of LIGO Scientific Collaboration.

1 Status of Search for Compact Binary Coalescences During LIGO’s Fifth Science Run Drew Keppel 1 for the LIGO Scientific Collaboration 1 California Institute.

NSF 21 Oct Science Nuggets Jolien Creighton University of Wisconsin–Milwaukee.

LIGO-G W A Caltech/MIT collaboration supported by the United States National Science Foundation Recent Results From The LIGO Search For Periodic.

LIGO-G Z The Q Pipeline search for gravitational-wave bursts with LIGO Shourov K. Chatterji for the LIGO Scientific Collaboration APS Meeting.

LIGO-G v2 The Search For Continuous Gravitational Waves Gregory Mendell, LIGO Hanford Observatory on behalf of the LIGO Science Collaboration The.

APS meeting, Dallas 22/04/06 1 A search for gravitational wave signals from known pulsars using early data from the LIGO S5 run Matthew Pitkin on behalf.

15-18 December 2004 GWDAW-9 Annecy 1 All-Sky broad band search for continuous waves using LIGO S2 data Yousuke Itoh 1 for the LIGO Scientific Collaboration.

G Z The LIGO gravitational wave detector consists of two observatories »LIGO Hanford Observatory – 2 interferometers (4 km long arms and 2 km.

LIGO-G Z Peter Shawhan (University of Maryland) for the LIGO Scientific Collaboration Special thanks to Michael Landry and Bruce Allen Eastern.

LIGO-G M Press Conference Scientific Operation of LIGO Gary H Sanders Caltech (on behalf of a large team) APS April Meeting Philadelphia 6-April-03.

Mike Cruise University of Birmingham Searches for very high frequency gravitational waves.

All-sky LIGO Search for Periodic Gravitational Waves in the Fourth Science Run (S4) Keith Riles University of Michigan For the LIGO Scientific Collaboration.

LIGO-G07XXXX-00-Z Beating the Crab pulsar spin-down and other upper limits: new results from the LIGO S5 known pulsar search Matthew Pitkin for the LIGO.

Broadband Search for Continuous-Wave Gravitation Radiation with LIGO Vladimir Dergachev (University of Michigan) for the LIGO/Virgo scientific collaboration.

Reaching for the spindown limit on the Crab Pulsar Joseph Betzwieser.

Broadband Search for Continuous-Wave Gravitational Radiation with LIGO Vladimir Dergachev (University of Michigan) for the LIGO scientific collaboration.

LIGO Insert Name of the Meeting KAWABE K., 2006/Apr/25 APS Meeting Dallas, W DCC: LIGO-G Z Coherent searches for periodic gravitational.

GWDAW11, Potsdam 19/12/06 LIGO-G Z 1 New gravitational wave upper limits for selected millisecond pulsars using LIGO S5 data Matthew Pitkin for.

Search for compact binary systems in LIGO data Thomas Cokelaer On behalf of the LIGO Scientific Collaboration Cardiff University, U.K. LIGO-G Z.

Thomas Cokelaer for the LIGO Scientific Collaboration Cardiff University, U.K. APS April Meeting, Jacksonville, FL 16 April 2007, LIGO-G Z Search.

Searches for CW signals

SC03 failed results delayed FDS: parameter space searches

Review production of 30min calibrated SFTs well under way (see talks by V.Dergachev., X. Siemens in ASIS/DetChar). Also expect calibrated h(t) in the next.

S2 Fstat paper presentation isolated

A 2 veto for Continuous Wave Searches

All-Sky broad band search for continuous waves using LIGO S2 data

The Search for Gravitational Waves with Advanced LIGO

Bounding the strength of gravitational radiation from Sco-X1

on behalf of the LIGO Scientific Collaboration

Sco-X1search : S2 results

Ra Inta (Texas Tech University)

The Q Pipeline search for gravitational-wave bursts with LIGO

Analysis of LIGO S2 data for GWs from isolated pulsars

Coherent wide parameter space searches for gravitational waves from neutron stars using LIGO S2 data Xavier Siemens, for the LIGO Scientific Collaboration.

Bounding the strength of gravitational radiation from Sco-X1

On Behalf of the LIGO Scientific Collaboration and VIRGO

A.M. Sintes for the pulgroup

Matthew Pitkin on behalf of the LIGO Scientific Collaboration

Continuous gravitational waves: Observations vs. theory

Broad-band CW searches in LIGO and GEO S2 and S3 data

Broad-band CW searches in LIGO and GEO S2 and S3 data

LIGO Scientific Collaboration, UW - Milwaukee

Broad-band CW searches in LIGO and GEO S2 and S3 data

Gravitational radiation from known radio pulsars using LIGO data

Presentation transcript:

LIGO Document G v4 A search for gravitational waves from Cassiopeia A using LIGO S5 data Karl Wette Centre for Gravitational Physics The Australian National University for the LIGO Scientific Collaboration 8th Edoardo Amaldi Conference on Gravitational Waves New York City, June 21-26, 2009

LIGO Document G v4 Cassiopeia A Youngest known neutron star (ca. 300 years) Image credit: X-ray (blue, green): NASA/CXC/SAO Optical (yellow): NASA/STScI Infrared (red): NASA/JPL-Caltech Image size: 7.3 x 6.4 arcmin

LIGO Document G v4 The neutron star in Cas A ● Isolated system ● No radio/x-ray pulsations ● No known rotation frequency ● So not a pulsar ● Possible neutron star models: ● Highly magnetized, slow rotation, not good for GW detection ● Weakly magnetized, higher rotation, potential for GW detection

LIGO Document G v4 Why is Cas A interesting? ● Can derive an indirect limit on gravitational wave strain h 0 or neutron star ellipticity ε ● Method is similar to known pulsars ● Assume all rotational energy goes into GWs ● Spindown is not known, assume  1 / age ● Limits are: [Wette et al, CQG ]

LIGO Document G v4 Why is Cas A interesting? ● We can beat the indirect limit with LIGO ● Using ~10 days of data from S5 science run ● Computationally feasible search ● Cas A is a young star ● More likely to still have any non-zero ellipticity acquired at birth ● Might still be emitting in r-modes ● First LIGO search for an isolated non-pulsing neutron star ● Trail blazer for future LIGO “directed” searches

LIGO Document G v4 Search pipeline basics ● Coherent / matched filter “F-statistic” search ● Known signal template for spinning neutron stars ● Template parameters: ● Sky position: known from photon astronomy ● Frequency: search 100 Hz to 300 Hz – Most sensitive LIGO band, computationally limited – Can make no statement about gravitational waves from Cas A outside of this band ● First and second spindown (df/dt, d 2 f/dt 2 )

LIGO Document G v4 First spindown / Hz s - 1 Search parameter space Frequency / Hz Second spindown / Hz s - 2 Limits on spindowns chosen based on: ● Spindown age ● Range of braking indices ● Allows for spindown from other physics besides GWs, e.g. photons, r-modes BCC lattice for optimal template placement

LIGO Document G v4 Data selection and compute cost ● Data from the two LIGO 4-km interferometers ● 9.7 days of data within a 12-day window ● ATLAS AEI ● 3.5 days ● ~5000 nodes ● ~7 x templates 2007 March 20 to 2007 April 1

LIGO Document G v4 Preliminary results: post-processing ● Removed outliers clearly associated with known instrumental lines ● e.g. harmonics of 60 Hz U.S. mains power ● Remaining results show no significant outlier ● F-statistic of loudest template is not statistically significant, given number of templates searched ● So we conclude no detection

LIGO Document G v4 Preliminary upper limits: strain

LIGO Document G v4 Preliminary upper limits: ellipticity

LIGO Document G v4 Summary of preliminary results ● No detection of gravitational waves from Cas A ● Only within searched band (100 to 300 Hz) ● Make no statement about GWs outside this band ● Beat indirect limit on Cas A using LIGO data ● Only been done a few times before (e.g. Crab)