Grote, HLIGO , Scientific Collaboration (700 Scientists)Abbott, BAllen, BMatichard, FArain, MKasprzyk, DAufmuth, PBabak, SBaker, PBarriga, PBilenko, I ACastaldi, GCharlton, PhilipChung, C. T.Y.Colacino, C. NConte, R.Dhurandhar, SHosken, DaveSato, TadahiroSergeev, ASancho De La Jordana, LGray, MalcolmLam, Ping KoyMcClelland, DavidMackenzie, KarenMow-Lowry, CMullavey, AdamRabeling, DavidSatterthwaite, MatthewScott, Susan MSlagmolen, BramWette, Karl2015-12-070264-9381http://hdl.handle.net/1885/24330The British-German gravitational wave detector GEO 600 has concluded a long observational period called Astrowatch, which lasted from November 2007 to July 2009. Together with the LIGO-H2 detector, GEO 600 was kept observing, while other detectors of the201010.1088/0264-9381/27/8/0840032015-12-07