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Abstract: We report on the status of the Laser Interferometric Gravitational-WaveObservatory LIGO and the plans and progress towards Enhanced and AdvancedLIGO. The initial LIGO detectors have finished a two year long data run duringwhich a full year of triple-coincidence data was collected at designsensitivity. Much of this run was also coincident with the data runs ofinterferometers in Europe, GEO600 and Virgo. The joint analysis of data fromthis international network of detectors is ongoing. No gravitational wavesignals have been detected in analyses completed to date. Currently two of theLIGO detectors are being upgraded to increase their sensitivity in a programcalled Enhanced LIGO. The Enhanced LIGO detectors will start another roughlyone year long data run with increased sensitivity in 2009. In parallel,construction of Advanced LIGO, a major upgrade to LIGO, has begun. Installationand commissioning of Advanced LIGO hardware at the LIGO sites will commence atthe end of the Enhanced LIGO data run in 2011. When fully commissioned, theAdvanced LIGO detectors will be ten times as sensitive as the initial LIGOdetectors. Advanced LIGO is expected to make several gravitational wavedetections per year.



Author: Joshua R Smith, for the LIGO Scientific Collaboration

Source: https://arxiv.org/







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