Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2010-02-18
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
10 pages, 8 figures Accepted for publication on Phys. Rev. D
Scientific paper
We present here the results of a 515 days long run of the IGEC2 observatory, consisting of the four resonant mass detectors ALLEGRO, AURIGA, EXPLORER and NAUTILUS. The reported results are related to the fourfold observation time from Nov. 6 2005 until Apr. 14 2007, when Allegro ceased its operation. This period overlapped with the first long term observations performed by the LIGO interferometric detectors. The IGEC observations aim at the identification of gravitational wave candidates with high confidence, keeping the false alarm rate at the level of 1 per century, and high duty cycle, namely 57% with all four sites and 94% with at least three sites in simultaneous observation. The network data analysis is based on time coincidence searches over at least three detectors: the four 3-fold searches and the 4-fold one are combined in a logical OR. We exchanged data with the usual blind procedure, by applying a unique confidential time offset to the events in each set of data. The accidental background was investigated by performing sets of 10^8 coincidence analyses per each detector configuration on off-source data, obtained by shifting the time series of each detector. The thresholds of the five searches were tuned so as to control the overall false alarm rate to 1/century. When the confidential time shifts was disclosed, no gravitational wave candidate was found in the on-source data. As an additional output of this search, we make available to other observatories the list of triple coincidence found below search thresholds, corresponding to a false alarm rate of 1/month.
Astone Pia
Baggio Lucio
Bassan Massimo
Bignotto Michele
Bonaldi Michele
No associations
LandOfFree
IGEC2: A 17-month search for gravitational wave bursts in 2005-2007 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with IGEC2: A 17-month search for gravitational wave bursts in 2005-2007, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IGEC2: A 17-month search for gravitational wave bursts in 2005-2007 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-405815