TUESDAY, April 21

LIGO Seminar, 1:00 PM - 2:00 PM, SCR 351 W Bridge
"An All-sky, Broadband Search for Continuous-Wave Gravitation Radiation with LIGO using PowerFlux," Vladimir Dergachev, University of Michigan for the LIGO and Virgo Collaborations.


Abstract:

Isolated rotating neutron stars are expected to emit gravitational radiation of nearly constant frequency and amplitude. Searches for such radiation with the LIGO interferometers are underway, using data taken from LIGO's fifth science run. We present an algorithm called PowerFlux, based on semi-coherent strain power sums, which accounts for Doppler and amplitude modulations, and for source spindown, over long time intervals. We will show results from the application of the PowerFlux detection pipeline to a broadband search in the initial data of the S5 run and discuss current approaches and progress in carrying out a broadband (50-1500 Hz) search over 2 years of data.