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Status and perspectives of the Virgo gravitational wave detector
T Accadia12, F Acernese12, F Antonucci9, S Aoudia15, K G Arun11, P Astone9, G Ballardin2, F Barone6, M Barsuglia1, Th S Bauer14, M G Beker14, A Belletoile12, S Bigotta8, S Birindelli15, M A Bizouard11, M Blom14, C Boccara3, F Bondu15, L Bonelli8, R Bonnand13, L Bosi7, S Braccini8, C Bradaschia8, A Brillet15, V Brisson11, R Budzyński17, T Bulik17, H J Bulten14, D Buskulic12, C Buy1, G Cagnoli4, E Calloni6, E Campagna4, B Canuel2, F Carbognani2, F Cavalier11, R Cavalieri2, G Cella8, E Cesarini4, E Chassande-Mottin1, A Chincarini5, F Cleva15, E Coccia10, C N Colacino8, J Colas2, A Colla9, M Colombini9, A Corsi9, J-P Coulon15, E Cuoco2, S D'Antonio10, A Dari7, V Dattilo2, M Davier11, R Day2, R De Rosa6, M del Prete8, L Di Fiore6, A Di Lieto8, M Di Paolo Emilio10, A Di Virgilio8, A Dietz12, M Drago16, V Fafone10, I Ferrante8, F Fidecaro8, I Fiori2, R Flaminio13, J-D Fournier15, J Franc13, S Frasca9, F Frasconi8, A Freise18, M Galimberti13, L Gammaitoni7, F Garufi6, G Gemme5, E Genin2, A Gennai8, A Giazotto8, R Gouaty12, M Granata1, C Greverie15, G Guidi4, H Heitmann15, P Hello11, S Hild18, D Huet2, P Jaranowski17, I Kowalska17, A Królak17, P La Penna2, N Leroy11, N Letendre12, T G F Li14, M Lorenzini4, V Loriette3, G Losurdo4, J-M Mackowski13, E Majorana9, N Man15, M Mantovani8, F Marchesoni7, F Marion12, J Marque2, F Martelli4, A Masserot12, F Menzinger2, C Michel13, L Milano6, Y Minenkov10, M Mohan2, J Moreau3, N Morgado13, A Morgia10, S Mosca6, V Moscatelli9, B Mours12, I Neri7, F Nocera2, G Pagliaroli10, C Palomba9, F Paoletti2,8, S Pardi6, M Parisi6, A Pasqualetti2, R Passaquieti8, D Passuello8, G Persichetti6, M Pichot15, F Piergiovanni4, M Pietka17, L Pinard13, R Poggiani8, M Prato5, G A Prodi16, M Punturo7, P Puppo9, O Rabaste1, D S Rabeling14, P Rapagnani9, V Re16, T Regimbau15, F Ricci9, F Robinet11, A Rocchi10, L Rolland12, R Romano6, D Rosińska17, P Ruggi2, B Sassolas13, D Sentenac2, R Sturani4, B Swinkels2, A Toncelli8, M Tonelli8, E Tournefier12, F Travasso7, J Trummer12, G Vajente8, J F J van den Brand14, S van der Putten14, M Vavoulidis11, G Vedovato16, D Verkindt12, F Vetrano4, A Viceré4, J-Y Vinet15, H Vocca7, M Was11 and M Yvert12
1 AstroParticule et Cosmologie (APC), CNRS: UMR7164-IN2P3-Observatoire de Paris-Université Denis Diderot-Paris VII – CEA : DSM/IRFU, France
2 European Gravitational Observatory (EGO), I-56021 Cascina (Pi), Italy
3 ESPCI, CNRS, F-75005 Paris, France
4 INFN, Sezione di Firenze, I-50019 Sesto Fiorentinoa; Università degli Studi di Firenze, I-50121b Firenze; Università degli Studi di Urbino 'Carlo Bo', I-61029 Urbinoc, Italy
5 INFN, Sezione di Genova; I-16146 Genova, Italy
6 INFN, sezione di Napoli a; Università di Napoli 'Federico II'b Complesso Universitario di Monte S.Angelo, I-80126 Napoli; Università di Salerno, Fisciano, I-84084 Salernoc, Italy
7 INFN, Sezione di Perugiaa; Università di Perugiab, I-6123 Perugia,Italy
8 INFN, Sezione di Pisaa; Università di Pisab; I-56127 Pisa; Università di Siena, I-53100 Sienac, Italy
10 INFN, Sezione di Roma Tor Vergataa; Università di Roma Tor Vergatab, Istituto di Fisica dello Spazio Interplanetario (IFSI) INAFc, I-00133 Roma; Università dell'Aquila, I-67100 L'Aquilad, Italy
11 LAL, Université Paris-Sud, IN2P3/CNRS, F-91898 Orsay, France
12 Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), IN2P3/CNRS, Université de Savoie, F-74941 Annecy-le-Vieux, France
13 Laboratoire des Matériaux Avancés (LMA), IN2P3/CNRS, F-69622 Villeurbanne, Lyon, France
14 National institute for Subatomic Physics, PO Box 41882, 1009 DB a; VU University Amsterdam, De Boelelaan 1081, 1081 HV b, Amsterdam, The Netherlands
15 Université Nice-Sophia-Antipolis, CNRS, Observatoire de la Côte d'Azur, F-06304 Nice a; Institut de Physique de Rennes, CNRS, Université de Rennes 1, 35042 Rennes b; France
16 INFN, Gruppo Collegato di Trentoa and Università di Trentob, I-38050 Povo, Trento, Italy; INFN, Sezione di Padovac and Università di Padovad, I-35131 Padova, Italy
17 IM-PAN 00-956 Warsawa; F.of Phys. Warsaw University 00-681Warsawb; Astro. Obs. Warsaw University 00-478 Warsawc; CAMK-PAN 00-716 Warsawd; Bialystok University 15-424 Bialystoke; IPJ 05-400 Swierk-Otwockf; Inst. of Astronomy 65-265 Zielona Gorag, Poland
18 University of Birmingham, Birmingham, B15 2TT, UK
Virgo is designed to detect gravitational waves of both astrophysical and cosmological origin in the frequency range from a few Hz to a few kHz. After the end of the first science run, partially overlapped with the LIGO fifth science run, the detector underwent several upgrades to improve its sensitivity. The second Virgo science run started at the beginning of July 2009 in coincidence with LIGO. A further upgrade is planned at beginning of 2010 with the installation of new suspensions for the test masses and of new mirrors. This will lead to a considerable improvement in the sensitivity and represents an intermediate step toward the development of the advanced detectors.