Bulletin of the American Physical Society
2009 APS April Meeting
Volume 54, Number 4
Saturday–Tuesday, May 2–5, 2009; Denver, Colorado
Session C5: Searches for Gravitational Waves with LIGO, GEO and Virgo |
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Sponsoring Units: GGR DAP Chair: Nergis Mavalvala, Massachusetts Institute of Technology Room: Governor's Square 15 |
Saturday, May 2, 2009 1:30PM - 2:06PM |
C5.00001: Overview of the LIGO-GEO S5 and Virgo VSR1 Science Runs, and Sources of Transient Gravitational Waves Invited Speaker: The five kilometer-scale gravitational-wave detectors in the United States and Europe collected data in 2005-2007 with better sensitivity and observing time than ever before. The data collected has been analyzed jointly, for maximum sensitivity, with a number of results released so far and more to come. I will summarize the instrument performance and data collection, and survey some of the transient gravitational-wave signals that we are searching for. Later talks in the same session will describe the specific searches carried out using the data. [Preview Abstract] |
Saturday, May 2, 2009 2:06PM - 2:18PM |
C5.00002: Status of the S5 search for compact object mergers with total mass between 25 and 100 solar masses Evan Ochsner We present the status of the search for gravitational waves from coalescing compact binary systems with total mass between 25 and 100 solar masses in the LIGO Fifth Science run (S5) data with the goal of constraining the merger rate. In this mass regime LIGO is sensitive to the inspiral, merger and ring down phases of the coalescence. We describe our ongoing effort to incorporate models based on recent advances in numerical relativity that probe the late inspiral, merger and ring down phases. [Preview Abstract] |
Saturday, May 2, 2009 2:18PM - 2:30PM |
C5.00003: GRB-triggered searches for gravitational waves from compact binary inspirals in LIGO and Virgo data during S5/VSR1 Nickolas Fotopoulos We describe a search for the gravitational-wave inspiral signatures of short gamma-ray bursts (GRBs) in LIGO and Virgo data taken during a two-year span that began in September 2005. The GRB community largely believes that most short GRBs are produced by the merger of two neutron stars or of a neutron star with a black hole. In their final orbits, such systems would produce strong gravitational waves. Through the efforts of electromagnetic astronomers, we know the time and sky location of these events, so we can search gravitational-wave data with a lower threshold than previous, untriggered searches. [Preview Abstract] |
Saturday, May 2, 2009 2:30PM - 2:42PM |
C5.00004: The Search for Low Mass Compact Binary Coalescences in LIGO's S5 and Virgo's VSR1 Data Dave McKechan We report on the search for gravitational waves from coalescing compact binary systems with total mass from 2-35 $M_{\odot}$ in the LIGO Fifth Science run (S5) data and Virgo's Science Run 1 (VSR1). We describe the pipeline employed by the LSC/Virgo to search for such waveforms in LIGO/Virgo data including how we suppress false signals originating from instrumental noise, how we evaluate the search efficiency for systems which may include spinning component objects, and how we establish confidence in likely detection candidates. Finally, we describe Bayesian coalescence rate upper limit calculations as a function of mass of the binary system and for several canonical mass systems including mass distributions representing binary neutron stars, binary black holes, and black hole neutron star binaries. [Preview Abstract] |
Saturday, May 2, 2009 2:42PM - 2:54PM |
C5.00005: Search for gravitational-wave burst counterparts to gamma-ray bursts using data from the fifth LIGO science run and the first Virgo science run Isabel Leonor We present the status of the search for short-duration gravitational-wave bursts (GWBs) associated with gamma-ray bursts (GRBs) detected by gamma-ray satellite experiments during the LIGO science run 5 / Virgo science run 1. This sample consists of more than 200 GRB triggers, most of which were observed by the Swift satellite. The search for GWBs associated with GRBs takes advantage of the known sky position and time of the GRB to construct linear combinations of the data that maximize or minimize the signal-to-noise ratio of a gravitational-wave signal with a given polarization. This allows for both high sensitivity to real gravitational waves and powerful consistency tests for suppressing background noise. We apply these techniques to search for gravitational radiation associated with individual GRBs, and also apply statistical tests to search for a gravitational-wave signature associated with the collective sample. [Preview Abstract] |
Saturday, May 2, 2009 2:54PM - 3:06PM |
C5.00006: All-sky search for gravitational wave bursts with LIGO, GEO and Virgo Michele Zanolin, E. Katsavounidis The network of gravitational-wave detectors LIGO, GEO and Virgo collected data of unprecedented sensitivity in their 2005-07 science runs. Using data from these runs, we describe the search for bursts: short-duration gravitational-wave signals with unknown or poorly modeled waveforms. Such signals, may accompany astrophysical events like core-collapse supernovae, the merger phase of coalescing binary compact stars and gamma-ray bursts (GRBs). In this talk we focus on the all-sky search of such signals with frequency content in the 64-2000Hz range- this encompasses the most sensitive regime of the ground-based interferometers. [Preview Abstract] |
Saturday, May 2, 2009 3:06PM - 3:18PM |
C5.00007: All-Sky Burst Searches for Gravitational Waves at High Frequencies Brennan Hughey Previous burst searches with ground-based interferometers have generally been limited to frequencies below 2 kilohertz. However, various models predict gravitational wave emission in the few-kilohertz range from gravitational collapse, neutron star modes, the mergers of some compact binaries or other astrophysical phenomena. We present all-sky gravitational wave burst searches at frequencies up to 6 kilohertz, conducted on data taken during LIGO's fifth science run and Virgo's first science run. [Preview Abstract] |
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