The Laser Interferometer Gravitational Wave Observatory (LIGO) and the LIGO Scientific Collaboration (LSC) are making great strides toward performing scientifically significant data analysis using Grid resources. LIGO is using the occasion of SC2004 to undertake a production analysis of data from its third science run (S3) searching for gravitational waves from binary neutron stars and black holes using Pegasus to manage the workflow. Scott Koranda (Univ. of WIsconsin-Milwaukee) is the central LIGO participant in this demo. Patrick Brady, Duncan Brown, Jolien Creighton, Stephen Fairhurst and Eirini Messaritaki (also from University of Wisconsin-Milwaukee) contributed the analysis software and workflow used in the Demo. Download the brochure [ PDF ] for more information about the Demo.