on behalf of the LIGO Scientific Collaboration

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.

Bounding the strength of gravitational radiation from Sco-X1 C Messenger on behalf of the LSC pulsar group GWDAW 2004 Annecy, 15 th – 18 th December 2004.

Upper-limit on Sco X-1 S2 preliminary results C Messenger, V Re and A Vecchio on behalf of PULG LSC General Meeting LHO, 10 th – 13 th November 2003.

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

LIGO-G Z Results from LIGO’s second science run: a search for continuous gravitational waves Michael Landry LIGO Hanford Observatory California.

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

LIGO-G W Gregory Mendell and Mike Landry LIGO Hanford Observatory The StackSlide Search Summary: November 2003.

1 Known Isolated Pulsars Preliminary S2 Results Réjean Dupuis, Matt Pitkin, Graham Woan LIGO-G Z.

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.

CW signals: plans for S2 June the group held a f2f meeting to discuss plans for analyses of S2 data (and beyond). Slides from the various presentations.

LIGO-G W The Search For Periodic Gravitational Waves Gregory Mendell, LIGO Hanford Observatory on behalf of the LIGO Scientific Collaboration.

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.

LIGO-G Z LIGO Scientific Collaboration 1 Upper Limits on the Rate of Gravitational Wave Bursts from the First LIGO Science Run Edward Daw Louisiana.

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

Searching for Gravitational Waves with LIGO Andrés C. Rodríguez Louisiana State University on behalf of the LIGO Scientific Collaboration SACNAS

LIGO-G Data Analysis Techniques for LIGO Laura Cadonati, M.I.T. Trento, March 1-2, 2007.

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.

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

LIGO-G Z 1 Setting upper limits on the strength of periodic GWs using the first science data from the LIGO and GEO detectors Bruce Allen, University.

Alicia M. Sintes On behalf of the LIGO Scientific Collaboration LIGO-G Z Results from the LSC Periodic Sources Working Group Recontres de Moriond.

Searching for continuous gravitational wave signals A.M. Sintes, Universitat de les Illes Balears, Spain Sources of Gravitational Waves Trieste, September.

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.

GW pulsars in binary systems Sco X-1 C Messenger and A Vecchio LSC General Meeting LIGO Livingston Observatory 17 th – 20 th March, 2003 LIGO-G Z.

1 Work of the LSC Pulsar Upper Limits Group (PULG) Graham Woan, University of Glasgow on behalf of the LIGO Scientific Collaboration GWDAW 2003.

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.

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.

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

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

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 Craig Robinson On behalf of the LIGO Scientific Collaboration Cardiff University, U.K. LIGO-G

GEO600 Data Analysis Status

Searches for CW signals

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.

Xavier Siemens for the LSC University of Wisconsin -- Milwaukee

Searching for accreting neutron stars

A 2 veto for Continuous Wave Searches

Overview of the CW Search Group Efforts – S2 data analyses Michael Landry LIGO Hanford Observatory on behalf of the CW Search Group LSC Meeting March.

Bounding the strength of gravitational radiation from Sco-X1

Searching for pulsars using the Hough transform

Sco-X1search : S2 results

Searching for gravitational-wave transients with Advanced detectors

Periodic Sources Working Group

Ra Inta (Texas Tech University)

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.

Sco-X1search : S2 results

Bounding the strength of gravitational radiation from Sco-X1

S3 time domain known pulsar search

S3 time domain known pulsar search

Searching for continuous gravitational

A.M. Sintes for the pulgroup

Matthew Pitkin on behalf of the LIGO Scientific Collaboration

Continuous gravitational waves: Observations vs. theory

Stochastic background search using LIGO Livingston and ALLEGRO

Hough search for continuous gravitational waves using LIGO S4 data

CW Search Group Efforts – overview Michael Landry LIGO Hanford Observatory on behalf of the CW Search Group LSC Meeting June 6, 2004 Tufts University,

Gravitational radiation from known radio pulsars using LIGO data

The Search For Periodic Gravitational Waves

Presentation transcript:

on behalf of the LIGO Scientific Collaboration The search for gravitational waves from rotating neutron stars: Results from the LIGO Scientific Collaboration Alberto Vecchio on behalf of the LIGO Scientific Collaboration GR17 – Dublin, 22nd July, 2004 LIGO-G040305-00-Z

Outline Analysis of the data from the LIGO second science run (S2): Method Results: Upper-limits on 28 isolated neutron stars known as radio pulsars (including Crab) Searches in progress Wider parameter space and classes of sources Variety of algorithms and search approaches Future outlook “Mountain” on neutron star Wobbling neutron star Accreting neutron star R-modes GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

Pointing at known neutron stars Targeted search of GWs from known isolated radio pulsars First science run (S1) analysis: upper-limit (95% confidence) on PSR J1939+2134: h0 < 1.4 x 10-22 (e < 2.9 x 10-4) Phys Rev D 69, 082004 (2004) Second science run (S2) analysis: 28 pulsars (all the ones above 50 Hz for which search parameters are “exactly” known) Data from the three LIGO interferometers GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

Compute posterior pdfs Analysis method Bayesian time domain demodulation What we are searching for: GWs from non-precessing triaxial pulsars of known position, frequency and spin-down rate The unknown parameters in a targeted search are h0 - amplitude of the gravitational wave signal  - polarization angle  - angle between rotation axis and line-of-sight 0 - initial phase of pulsar Heterodyne, low-pass, average, calibrate Raw data Model Compute joint likelihood uniform priors on h0(>0), cosi, j0, y Compute posterior pdfs posterior  prior  likelihood Compute upper limits GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

The 28 pulsars targeted for S2 B0021-72C B0021-72D B0021-72F B0021-72G B0021-72L B0021-72M B0021-72N B0531+21 (Crab) B1516+02A B1820-30A B1821-24 B1937+21 (S1) B1951+32 J0030+0451 J0711-6830 J1024-0719 J1629-6902 J1721-2457 J1730-2304 J1744-1134 J1748-2446C J1910-5959B J1910-5959C J1910-5959D J1910-5959E J1913+1011 J2124-3358 J2322+2057 There are 38 known isolated radio pulsars with fGW > 50 Hz, including PSR J1939+2134 (used in S1) and the Crab pulsar Timing information for 28 pulsars: Radio observations collected over S2/S3 for 18 of these ATNF catalogue used for 10 others The remaining 10 pulsars have not been included in the analysis because of outdated spin parameters (would require more that one template) GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

Summary of S2 results h95 Preliminary – paper to be submitted soon Crab pulsar S1 J1939+2134 S2 h95 1 PDF strain J1910 – 5959D: h0 = 1.7 x 10-24 Preliminary – paper to be submitted soon GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

Summary of S2 results ? ? Preliminary – paper to be submitted soon Ellipticity S2 Crab pulsars Spin-down upper-limit ? S1 J1939+2134 S2 Spin-down upper-limit ? Preliminary – paper to be submitted soon GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

In progress: wide parameter space searches Coherent Incoherent Use F-statistic (Jaranowski et al, 1998) frequency domain analysis over part of the data set (< ½ day) for search at optimal sensitivity: All sky, wide band (~ 300 Hz ) search for monochromatic, isolated neutron stars Targeted search on Sco X-1 (accreting neutron star in a binary system) Sensitivity: Exploit efficiency of incoherent methods to probe a wide parameter space (all sky, ~200 Hz band, one spin-down parameter) using the full data set Hough transform (Krishnan et al, gr-qc/0407001) Stack-slide (Brady and T. Creighton, 2000) PowerFlux Sensitivity: GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio

Conclusions Analyses of the second LIGO science run (S2): Time-domain analysis of 28 known radio pulsars complete. Best upper-limit on amplitude: PSR J1910 – 5959D: h0 = 1.7 x 10-24 Best upper-limit on ellipticity: PSR J2124 – 3358: e = 4.5 x 10-6 Upper-limit on Crab pulsar is a factor ~30 from spin-down upper-limit Approaching completion: All-sky, broadband coherent frequency-domain search Sco X-1 coherent frequency-domain search All-sky incoherent searches Third science run (improved sensitivity LIGO/GEO run) Time-domain analysis on more pulsars, including binaries Approaching spin-down upper-limit for Crab pulsar Extend scope of wide parameter space searches GR17 – 22nd July, 2004 LIGO-G040305-00-Z A. Vecchio