IGEC2: A 17-month search for gravitational wave bursts in 2005-2007

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.022003· OSTI ID:21410086

Astone, P ^[1]; Baggio, L ^[2]; Bassan, M; Coccia, E; Fafone, V; Moleti, A ^[3]; Bignotto, M; Cerdonio, M; Drago, M; Liguori, N ^[4]; Bonaldi, M; Falferi, P ^[5]; Bonifazi, P ^[1]; Cavallari, G ^[6]; Conti, L; Longo, S; Vedovato, G; Zendri, J P ^[7]; D'Antonio, S; Rocchi, A ^[8]

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1. INFN, Sezione di Roma, P.le A.Moro 2, I-00185, Roma (Italy)
2. CNRS, LATMOS, 78280 Guyancourt (France)
3. Dipartimento di Fisica, Universita di Roma 'Tor Vergata', Via Ricerca Scientifica 1, I-00133 Roma (Italy)
4. Dipartimento di Fisica, Universita di Padova, Via Marzolo 8, 35131 Padova (Italy)
5. Istituto di Fotonica e Nanotecnologie, CNR-Fondazione Bruno Kessler, 38123 Povo, Trento (Italy)
6. CERN, Geneva (Switzerland)
7. INFN, Sezione di Padova, Via Marzolo 8, 35131 Padova (Italy)
8. INFN, Sezione di Roma Tor Vergata, Via Ricerca Scientifica 1, I-00133 Roma (Italy)

We present here the results of a 515 day search for short bursts of gravitational waves by the IGEC2 observatory. This network included 4 cryogenic resonant-bar detectors: AURIGA, EXPLORER, and NAUTILUS in Europe, and ALLEGRO in America. These results cover the time period from November 6th 2005 until April 15th 2007, partly overlapping the first long term observations by the LIGO interferometric detectors. The observatory operated with high duty cycle, namely, 57% for fourfold coincident observations, and 94% for threefold observations. The sensitivity was the best ever obtained by a bar network: we could detect, with an efficiency >50%, impulsive events with a burst strain amplitude h{sub rss} < or approx. 1x10{sup -19} Hz{sup -1/2}. The network data analysis was based on time coincidence searches over at least three detectors, used a blind search technique, and was tuned to achieve a false alarm rate of 1/century. When the blinding was removed, no gravitational wave candidate was found.

• OSTI ID: 21410086
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevD.82.022003; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLITUDES
DATA ANALYSIS
EFFICIENCY
GRAVITATIONAL WAVE DETECTORS
GRAVITATIONAL WAVES
SENSITIVITY
MEASURING INSTRUMENTS
RADIATION DETECTORS