Abadie, J.Hosken, D.Munch, J.Ottaway, D.Veitch, P.2012-03-052012-03-052011Physical Review Letters, 2011; 107(27):1-90031-90071079-7114http://hdl.handle.net/2440/69676The gravitational-wave (GW) sky may include nearby pointlike sources as well as stochastic backgrounds. We perform two directional searches for persistent GWs using data from the LIGO S5 science run: one optimized for pointlike sources and one for arbitrary extended sources. Finding no evidence to support the detection of GWs, we present 90% confidence level (C.L.) upper-limit maps of GW strain power with typical values between 2-20×10⁻⁵⁰  strain² Hz⁻¹ and 5-35×10⁻⁴⁹  strain² Hz⁻¹ sr⁻¹ for pointlike and extended sources, respectively. The latter result is the first of its kind. We also set 90% C.L. limits on the narrow-band root-mean-square GW strain from interesting targets including Sco X-1, SN 1987A and the Galactic center as low as ≈7×10⁻²⁵ in the most sensitive frequency range near 160 Hz.en©2011 American Physical SocietyLIGO Scientific CollaborationVirgo CollaborationJournal article002011587710.1103/PhysRevLett.107.2711020002986110000072-s2.0-8485527550726238Ottaway, D. [0000-0001-6794-1591]Veitch, P. [0000-0002-2597-435X]