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

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Presentation transcript:

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

Coherent searches Time-domain analyses (optimal parameter est.) (S2 analyses in red) Time-domain analyses (optimal parameter est.) Bayesian upper limit on 28 known isolated pulsars Underwent extremely helpful review process Final numbers in paper Parameter estimation with Markov-Chain Monte-Carlo method Frequency domain analyses (optimal blind detection) F-statistic, nearby all-sky, broadband, ~10h data New coincidence pipeline implemented Preliminary results on 10Hz band all-sky search F-statistic, LMXB Sco X-1, ~6h data Also employs new coincidence pipeline Preliminary analysis of 620-624Hz band F-statistic, galactic core, broadband GR17 LSC Meeting 6 Jun 2004

Incoherent searches Three searches: all-sky, wideband, scanning all observation time PowerFlux Code optimization (now written in C instead of script language) Finer binning in sky Stack-Slide SFTs normalized with LAL running median code Monte Carlo in place Hough New Monte Carlo Preliminary all-sky analysis on 200-400Hz band Moving towards hierarchical search, alternating stages of incoherent and coherent search algorithms LSC Meeting 6 Jun 2004

Publication plans TDS Plan Modify existing S2 paper Prune analysis section and add detector section (Whitcomb) Rewrite opening two paragraphs (Finn) S3 TDS: expect longer paper, increase population of isolated pulsars, include binaries Target PRD F-statistic results: combined PRD paper on I) broadband all-sky search, and II) Sco X-1 Expect to be submitted PRD Hough transform results (PRD) To be submitted to PRD Possible inclusion, if ready, of other incoherent methods such as Stackslide and Powerflux LSC Meeting 6 Jun 2004

Sunday a.m. session 9:00 - 9:15 Introduction 9:15 - 9:30 Coherent frequency-domain search for unknown isolated pulsars – M. Papa 9:30 - 9:40 questions 9:40 - 9:55 Coherent frequency-domain search for signal from binary system Sco-X1 - A. Vecchio 9:55 -10:05 questions 10:05 – 10:30 no comments from reviewers 10:30 – 10:45 Break 10:45 -10:55 Incoherent search for strong unknown isolated pulsars using PowerFlux – V. Dergachev 10:55 – 11:05 Incoherent search for unknown isolated pulsars using the stack-slide method – G. Mendell 11:05 – 11:15 Incoherent search for unknown isolated pulsars using Hough transform – A. Sintes LSC Meeting 6 Jun 2004