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.

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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 16, 2004 LIGO Livingston Observatory, WA

S1 paper Proof returned to PRD one week ago Scheduled to appear in PRD: V69 LSC Meeting 16 Mar 2004

CW search group members C. Cutler, Y. Itoh, B. Krishnan, B. Machenschalk, M. Papa, R. Prix, B. Schutz (AEI) S. Anderson, T. Creighton, R. Drever (CIT) N. Christensen (Carleton College) T. Regimbau (MIT) M. Landry, G. Mendell (LHO) M. Zucker (LLO) A. Sintes (U. Balearic Islands) C. Messenger, V. Re, A. Vecchio (U. Birmingham ) R. Dupuis, M. Pitkin, J. Veitch, G. Woan (U. Glasgow) D. Chin, V. Dergachev, D. Gustafson, K. Riles (U. Michigan) B. Allen, X. Siemens (UW Milwaukee) LSC Meeting 16 Mar 2004

Coherent searches Time-domain analyses (optimal parameter est.) S1-like, Bayesian upper limit Includes Crab pulsar Parameter estimation with Markov-Chain Monte-Carlo method Frequency domain analyses (optimal blind detection) F-statistic, nearby all-sky, broadband, ~10h data F-statistic, LMXB Sco X-1, ~6h data F-statistic, galactic core, broadband Einstein@home NSF ITR grant request submitted Feb 04 (S2 analyses in red) LSC Meeting 16 Mar 2004

Incoherent searches Hough transforms Stack-slide PowerFlux (formerly ‘Unbiased’) All three are all-sky, wideband searches, scanning all observation time Moving towards hierarchical search, alternating stages of incoherent and coherent search algorithms LSC Meeting 16 Mar 2004

Expected S2 publications Time-domain: upper limits on 28 (38?) known pulsars To be submitted to PRL or ApJ Results to be presented at April APS (May 1st,Denver), approximately coincident with submission of paper F-statistic results: combined PRD paper on I) broadband all-sky search, and II) Sco X-1 To be submitted PRD Pipeline still under definition: expect results and draft for June LSC meeting Hough transform results (PRD) Possible inclusion, if ready, of other incoherent methods such as PowerFlux and Stackslide To be submitted to PRD Expect results and draft for June LSC meeting LSC Meeting 16 Mar 2004

Tuesday a.m. session 8:00-8:05 Introduction 8:05-8:15 +5 Coherent search for unknown isolated pulsars – M. Papa 8:20-8:30 +5 Coherent search for signal from binary system Sco-X1 - A. Vecchio 8:35-8:45 +5 Incoherent search for unknown isolated pulsars using Hough transform – A. Sintes 8:50-8:57 +5 Incoherent search for unknown isolated pulsars using the stack-slide method – G. Mendell 9:02-9:09 +5 Incoherent search for strong unknown isolated pulsars using PowerFlux – K. Riles (leaves one minute to spare…) 10m +5 7m +5 LSC Meeting 16 Mar 2004