Calibration of advanced Virgo and reconstruction of the gravitational wave signal h(t) during the observing run O2

Acernese,; and Adams, F.; and Agatsuma, T.; and Aiello, K.; and Allocca, L.; and Aloy, A.; and Amato, M. A.; and Antier, A.; and Arene, S.; and Arnaud, M.; and Ascenzi, N.; and Astone, S.; and Aubin, P.; and Babak, F.; and Bacon, S.; and Badaracco, P.; and Bader, F.; and Baldaccini, M. K. M.; and Ballardin, F.; and Barone, G.; and Barsuglia, F.; and Barta, M.; and Basti, D.; and Bawaj, A.; and Bazzan, M.; and Bejger, M.; and Belahcene, M.; and Bernuzzi, I.; and Bersanetti, S.; and Bertolini, D.; and Bitossi, A.; and Bizouard, M.; and Bloemen, M. A.; and Boer, S.; and Bogaert, M.; and Bondu, G.; and Bonnand, F.; and Boom, R.; and Boschi, B. A.; and Bouffanais, V.; and Bozzi, Y.; and Bradaschia, A.; and Branchesi, C.; and Briant, M.; and Brighenti, T.; and Brillet, F.; and Brisson, A.; and Bulik, V.; and Bulten, T.; and Buskulic, H. J.; and Buy, D.; and Cagnoli, C.; and Calloni, G.; and Canepa, E.; and Canizares, M.; and Capocasa, P.; and Carbognani, E.; and Diaz, F.; Casanueva and Casentini, J.; and Caudill, C.; and Cavalier, S.; and Cavalieri, F.; and Cella, R.; and Cerda-Duran, G.; and Cerretani, P.; and Cesarini, G.; and Chaibi, E.; and Chassande-Mottin, O.; and Chincarini, E.; and Chiummo, A.; and Christensen, A.; and Chua, N.; and Ciani, S.; and Ciolfi, G.; and Cipriano, R.; and Cirone, F.; and Cleva, A.; and Coccia, F.; and Cohadon, E.; P-F and Cohen,; and Colla, D.; and Conti, A.; and Cordero-Carrion, L.; and Cortese, I.; and Coulon, S.; J-P and Cuoco,; and D'Antonio, E.; and Dattilo, S.; and Davier, V.; and De Rossi, M.; and Degallaix, C.; and De laurentis, J.; and Deleglise, M.; and Del Pozzo, S.; and De Pietri, W.; and De Rosa, R.; and Di Fiore, R.; and Di Giovanni, L.; and Di Girolamo, M.; and Di Lieto, T.; and Di Pace, A.; and Di Palma, S.; and Di Renzo, I.; and Dolique, F.; and Drago, V.; and Eisenmann, M.; and Estevez, M.; and Fafone, D.; and Farinon, V.; and Feng, S.; and Ferrante, F.; and Ferrini, I.; and Fidecaro, F.; and Fiori, F.; and Fiorucci, I.; and Flaminio, D.; and Font, R.; and Fournier, J. A.; J-D and Frasca,; and Frasconi, S.; and Frey, F.; and Gammaitoni, V.; and Garufi, L.; and Gemme, F.; and Genin, G.; and Gennai, E.; and Germain, A.; and Ghosh, V.; Archisman and Giacomazzo,; and Giazotto, B.; and Giordano, A.; and Castro, G.; Gonzalez and Gosselin, J. M.; and Gouaty, M.; and Grado, R.; and Granata, A.; and Greco, M.; and Groot, G.; and Gruning, P.; and Guidi, P.; and Halim, G. M.; and Harms, O.; and Heidmann, J.; and Heitmann, A.; and Hello, H.; and Hemming, P.; and Hinderer, G.; and Hoak, T.; and Hofman, D.; and Hreibi, D.; and Huet, A.; and Iess, D.; and Intini, A.; and Isac, G.; J-M and Jacqmin,; and Jaranowski, T.; and Jonker, P.; and Katsanevas, R. J. G.; and Kefelian, S.; and Khan, F.; and Koley, I.; and Kowalska, S.; and Krolak, I.; and Kutynia, A.; and Lartaux-Vollard, A.; and Lazzaro, A.; and Leaci, C.; and Leonardi, P.; and Leroy, M.; and Letendre, N.; and Longo, N.; and Lorenzini, A.; and Loriette, M.; and Losurdo, V.; and Lumaca, G.; and Majorana, D.; and Maksimovic, E.; and Man, I.; and Mantovani, N.; Marchesoni, F.; and Marion, F.; and Marquina, F.; and Martelli, A.; and Martellini, F.; and Masserot, L.; and Mastrogiovanni, A.; and Meidam, S.; and Mereni, J.; and Merzougui, L.; and Metzdorff, M.; and Michel, R.; and Milano, C.; and Miller, L.; and Minazzoli, A.; and Minenkov, O.; and Mohan, Y.; and Montani, M.; and Mours, M.; and Nardecchia, B.; and Naticchioni, I.; and Nelemans, L.; and Nichols, G.; and Nissanke, D.; and Nocera, S.; and Obergaulinger, F.; and Pagano, M.; and Palomba, G.; and Paoletti, C.; and Paoli, F.; and Pasqualetti, A.; and Passaquieti, A.; and Passuello, R.; and Patil, D.; and Patricelli, M.; and Pedurand, B.; and Perreca, R.; and Piccinni, A.; and Pichot, O. J.; and Piergiovanni, M.; and Pillant, F.; and Pinard, G.; and Poggiani, L.; and Popolizio, R.; and Porter, P.; and Possenti, E. K.; and Prodi, L.; and Punturo, G. A.; and Puppo, M.; and Rapagnani, P.; and Razzano, P.; and Regimbau, M.; and Rei, T.; and Ricci, L.; and Robinet, F.; and Rocchi, F.; and Rolland, A.; and Romano, L.; and Rosinska, R.; and Ruggi, D.; and Salconi, P.; and Samajdar, L.; and Sanchis-Gual, A.; and Sassolas, N.; and Schmidt, B.; and Sentenac, P.; and Sequino, D.; and Sieniawska, V.; and Singhal, M.; and Sorrentino, A.; and Stratta, F.; and Swinkels, G.; and Tacca, B. L.; and Tiwari, M.; and Tonelli, S.; and Torres-Forne, M.; Travasso, F.; and Tringali, F.; and Trozzo, M. C.; and Tsang, L.; and van Bakel, K. W.; and van Beuzekom, N.; and van den Brand, M.; and Van den Broeck, J. F. J.; and van der Schaaf, C.; and van Heijningen, L.; and Vardaro, J. V.; and Vasuth, M.; and Vedovato, M.; and Verkindt, G.; and Vetrano, D.; and Vicere, F.; and Vinet, A.; J-Y and Vocca,; and Walet, H.; and Wang, R.; and Was, G.; and Williamson, M.; and Yvert, A. R.; and Zadrozny, M.; and Zelenova, A.; and Zendri, T.; J-P and Kandhasamy,; and Urban, S.; and Virgo Collaboration, A. L.

doi:10.1088/1361-6382/aadf1a

In August 2017, advanced Virgo joined advanced LIGO for the end of the O2 run, leading to the first gravitational waves detections with the three-detector network. This paper describes the advanced Virgo calibration and the gravitational wave strain h(t) reconstruction during O2. The methods are the same as the ones developed for the initial Virgo detector and have already been described in previous publications; this paper summarizes the differences and emphasis is put on estimating systematic uncertainties. Three versions of the h(t) signal have been computed for the Virgo O2 run, an online version and two post-run reprocessed versions with improved detector calibration and reconstruction algorithm. A photon calibrator has been used to establish the sign of h(t) and to make an independent partial cross-check of the systematic uncertainties. The uncertainties reached for the latest h(t) version are 5.1% in amplitude, 40 mrad in phase and 20 mu s in timing.