Stochastic Background Search Correlating ALLEGRO with LIGO Engineering Data

We describe the role of correlation measurements between the LIGO interferometer in Livingston, LA, and the ALLEGRO resonant bar detector in Baton Rouge, LA, in searches for a stochastic background of gravitational waves. Such measurements provide a valuable complement to correlations between interferometers at the two LIGO sites, since they are sensitive in a different, higher, frequency band. Additionally, the variable orientation of the ALLEGRO detector provides a means to distinguish gravitational wave correlations from correlated environmental noise. We describe the analysis underway to set a limit on the strength of a stochastic background at frequencies near 900Hz using ALLEGRO data and data from LIGO’s E7 Engineering Run. PACS numbers: 04.80.Nn, 07.05.Kf, 98.70.Vc Published as Class. Quantum Grav. 20, S689 (2003); c ©2003 IOP Publishing Ltd, http://www.iop.org/ E-mail: [email protected] Stochastic Background Search with ALLEGRO and LIGO 2