All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data

  title={All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data},
  author={The Ligo Scientific Collaboration and T. Abbott and Robin Abbott and Thomas Abbott and Sylvain Abraham and Fausto Acernese and Kendall Ackley and Cameron Adams and Rana X. Adhikari and Vaishali Adya and Christoph Affeldt and Michalis Agathos and Kazuhiro Agatsuma and Nishith Aggarwal and Odylio D. Aguiar and L. Aiello and Anirban Ain and Parameswaran Ajith and Grant Allen and Annalisa Allocca and M {\'A} Aloy and P. A. Altin and Anthony A. Amato and Alena Ananyeva and S. B. Anderson and W. G. Anderson and S. V. Angelova and Sarah Antier and Stephen Appert and Ken-ichi Arai and M. C. Araya and J. S. Areeda and M. Ar{\`e}ne and Nicolas Arnaud and Kumar Gupta Arun and Stefano Ascenzi and Gregory Ashton and S. M. Aston and Pia Astone and Franccois Aubin and Peter Aufmuth and K. AultONeal and C. Austin and V. Avendano and Alejandro Avila-Alvarez and Stanislav Babak and P. Bacon and F. Badaracco and M. K. M. Bader and S. Bae and P. T. Baker and F. Baldaccini and G. Ballardin and Stefan W. Ballmer and Sharan Banagiri and J. C. B. Barayoga and Sally Barclay and Barry C. Barish and D. Barker and Kevin Barkett and Samuel Barnum and Fabrizio Barone and Benjamin Barr and Lisa Barsotti and Matteo Barsuglia and D'aniel Barta and Jms Bartlett and Imre Bartos and Riccardo Bassiri and Ali Basti and Mateusz Bawaj and J. C. Bayley and Marco Bazzan and Bence B'ecsy and Michał Bejger and I. Belahcene and A S Bell and Disha Beniwal and Benjamin Berger and Georg Bergmann and Sebastiano Bernuzzi and J. J. Bero and Christopher Philip Luke Berry and Diego Bersanetti and Alessandro Bertolini and Joe Betzwieser and R. Bhandare and J. Bidler and I. A. Bilenko and S. A. Bilgili and G. Billingsley and John Birch and Rosanne Birney and Ofek Birnholtz and S{\'e}bastien Biscans and Sylvia Biscoveanu and Arpita Bisht and Marco Bitossi and Marie Anne Bizouard and J. K. Blackburn and C. D. Blair and David G Blair and Randall Blair and Steven Bloemen and Niels Bode and Michel Boer and Yannick Boetzel and G. Bogaert and François Bondu and Edgard Bonilla and Romain Bonnand and P. Booker and B. A. Boom and Callum Dale Booth and Rolf Bork and Valerio Boschi and Suvadeep Bose and K. Bossie and Vladimir Bossilkov and Joel Bosveld and Yann Bouffanais and A. Bozzi and Carlo Bradaschia and Patrick R. Brady and A. Bramley and Marica Branchesi and J. E. Brau and Tristan Briant and James H. Briggs and Fabrizio Brighenti and Anne Brillet and Martin Brinkmann and Violette Brisson and Patrick Brockill and Annabelle Brooks and Daniel Brown and S. Brunett and Aaron Buikema and Tomasz Bulik and H. J. Bulten and Alessandra Buonanno and D. Buskulic and Christelle Buy and Robert L. Byer and Mariona Cabero and Laura Cadonati and Gianpietro Cagnoli and Craig Cahillane and Jaime Bustillo and Thomas Callister and E. Calloni and J. B. Camp and Wallace Alexander Campbell and K. C. Cannon and Huijing Cao and Junwei Cao and E. Capocasa and F. Carbognani and S. Caride and Megan Carney and Gregorio Carullo and J. Casanueva Diaz and Claudio Casentini and Sarah Caudill and Marco Cavaglia and Fabien Cavalier and R. Cavalieri and G. Cella and Pablo Cerd{\'a}-Dur{\'a}n and G. Cerretani and Enrico Cesarini and O. Chaibi and Kabir Chakravarti and Shaun Chamberlin and Michael F. S. Chan and S. Chao and P. Charlton and Eve A. Chase and {\'E}ric Chassande-Mottin and Debjyoti Chatterjee and M. Chaturvedi and B. D. Cheeseboro and H. Y. Chen and Xun Chen and Yan-bei Chen and H.-P. Cheng and C. K. Cheong and Ho Yeek Chia and Andrea Chincarini and Ana Chiummo and G. Cho and Han Su Cho and M. Cho and Nelson L. Christensen and Qiao-yan Chu and Sheon Chua and K. W. Chung and Shin Kee Chung and Giacomo Ciani and A. A. Ciobanu and Riccardo Ciolfi and F. Cipriano and A Cirone and F. Clara and James Alexander Clark and Patrick Clearwater and Fr{\'e}d{\'e}ric Cleva and C. Cocchieri and Eugenio Coccia and P. F. Cohadon and David P. A. Cohen and Richard Colgan and Marta Colleoni and Christophe Collette and Chris A. Collins and L. R. Cominsky and M. Constancio and Livio Conti and Steven J. Cooper and P. Corban and Thomas Corbitt and Isabel Cordero-Carri{\'o}n and K. R. Corley and Neil J. Cornish and Alessandra Corsi and S. Cortese and C. A. Costa and Roberto Cotesta and Michael W. Coughlin and Scott Coughlin and J. P. Coulon and Stefan Countryman and P. Couvares and P. B. Covas and Elizabeth Cowan and David M. Coward and M. J. Cowart and D. C. Coyne and R. Coyne and Jolien D. E. Creighton and Teviet Creighton and Jonathan Cripe and M. Croquette and S. G. Crowder and T. J. Cullen and Andrew Cumming and Laura Cunningham and Elena Cuoco and T. Dal Canton and Gergely D'alya and S. L. Danilishin and Salvatore D'Antonio and Karsten Danzmann and Arnab Dasgupta and C. F. Da Silva Costa and L. E. H. Datrier and V. Dattilo and Isha Dave and Michel Davier and Dougal Davis and E. J. Daw and D. Debra and M. Deenadayalan and J{\'e}r{\^o}me Degallaix and M. De Laurentis and Samuel Deleglise and Walter Del Pozzo and L{\'e}a Maria Macruz Ferreira Demarchi and Nicholas Demos and Thomas Dent and Roberto De Pietri and Jason Derby and R. De Rosa and Camilla de Rossi and R. Desalvo and Omar de Varona and Sanjeev Dhurandhar and M. C. D'iaz and Tim Dietrich and Luciano Di Fiore and Martina Di Giovanni and Tristano Di Girolamo and Anna Di Lieto and B. Ding and Sibilla Di Pace and Irene Di Palma and Francesco Di Renzo and A. Dmitriev and Zoheyr Doctor and Frederick J. Donovan and K. L. Dooley and S. Doravari and Iain Dorrington and T. P. Downes and M. Drago and Jenne C. Driggers and Zhihui Du and J.-G. Ducoin and Peter Dupej and S. E. Dwyer and P. J. Easter and T. B. Edo and Matthew C. Edwards and A. Effler and P. Ehrens and Johannes Eichholz and Stephen S. Eikenberry and Monika Eisenmann and Ronald Eisenstein and R. C. Essick and H'ector Estell'es and Daymys Estevez and Zachariah B. Etienne and T. Etzel and Michael W. Evans and T. M. Evans and Viviana Fafone and H. Fair and S. Fairhurst and Xiaohui Fan and Stefania Farinon and Benjamin Farr and Will M Farr and Edward Fauchon-Jones and Marc Favata and M. Fays and Marco Fazio and Corey Fee and J. Feicht and M. M. Fejer and Felix Y. Feng and A. Fernandez-Galiana and Isidoro Ferrante and E. C. Ferreira and T Alexandra Ferreira and F. Ferrini and F. Fidecaro and I. Fiori and D. Fiorucci and Maya Fishbach and Rebecca Fisher and J. M. Fishner and M. Fitz-Axen and Raffaele Flaminio and Michael Fletcher and Elena Flynn and Heather Fong and Jos'e A. Font and P. W. F. Forsyth and J.-D. Fournier and Sergio Frasca and F. Frasconi and Zsolt Frei and Andreas Freise and Ray Frey and Valentine Frey and Peter Fritschel and Valery Victor Frolov and P. Fulda and M. Fyffe and Hunter Gabbard and B. U. Gadre and S. M. Gaebel and Jonathan R. Gair and L Gammaitoni and Miftar Ganija and S. G. Gaonkar and A. Garc'ia and Cecilio Garc'ia-Quir'os and Fabio Garufi and B. Gateley and Sergio Gaudio and G. Gaur and V. M. Gayathri and Gianluca Gemme and Emilie Genin and Andrea Gennai and Daniel George and Juby George and L. 'A. Gergely and Vincent Germain and Sushrut Ghonge and Abhirup Ghosh and Archisman Ghosh and Shaon Ghosh and Bruno Giacomazzo and J. A. Giaime and K. D. Giardina and Adalberto Giazotto and K. Gill and G. Giordano and Lauren Glover and Patrick M. Godwin and Evan Goetz and Rolf Goetz and B. Goncharov and G. Oria Gonzalez and J. M. Gonzalez Castro and Achamveedu Gopakumar and Michael L. Gorodetsky and Sarah Gossan and M. Gosselin and R. Gouaty and Aniello Grado and C. Graef and Massimo Granata and A. Grant and Slawomir Gras and Paul Grassia and C. Gray and Richard Gray and Giuseppe Greco and Andrew E. C. Green and R. Green and E. M. Gretarsson and Paul J. De Groot and Hartmut Grote and Steffen Grunewald and P. Gruning and G. M. Guidi and Harleen Kaur Gulati and Y. Guo and Anchal Gupta and M. K. Gupta and Eric Gustafson and Rick Gustafson and Leila Haegel and O. Halim and Brenton Hall and E. D. Hall and E. Z. Hamilton and G. D. Hammond and M. Haney and M. M. Hanke and Jonathan Hanks and C. Hanna and Otto A. Hannuksela and Jonathan Hanson and T. Hardwick and K. Haris and Jan Harms and Gregory Harry and Ian W. Harry and C. J. Haster and K. Haughian and F. J. Hayes and Jherek Healy and Antoine Heidmann and M. C. Heintze and H. Heitmann and P. Hello and G. Hemming and Martin Hendry and Ik Siong Heng and J. Hennig and A. W. Heptonstall and Francisco Hernandez Vivanco and M. Heurs and Stefan Hild and Thomas Hinderer and David Hoak and Sabrina Hochheim and D. J. Hofman and A. M. Holgado and N. A. Holland and Kimberley Holt and Daniel E. Holz and Peter Hopkins and Chuck Horst and J. H. Hough and E. J. Howell and Cassandra Hoy and A. Hreibi and Esperanza Huerta and Denis Huet and Brennan Hughey and Michael Hulko and Svein Husa and S. H. Huttner and Tarn Huynh-Dinh and B. Idźkowski and Alberto Iess and C. Ingram and R. Inta and Giuseppe Intini and Bradley Irwin and Hezekiah Isa and J. M. Isac and M. Isi and Bala R. Iyer and K. Izumi and Thibaut Jacqmin and Sammita Jadhav and Karan Jani and N. N. Janthalur and Piotr Jaranowski and Alexander C. Jenkins and J. Jiang and Duncan S. Johnson and Aled Wynne Jones and D. I. Jones and Rwl Jones and R. J. G. Jonker and L Ju and Juliane Junker and Chinmay Kalaghatgi and Vassiliki Kalogera and Brittany L. Kamai and S. Kandhasamy and G. Kang and Jonah Kanner and S. J. Kapadia and Sanjeev Karki and K. S. Karvinen and Rahul Kashyap and M. Kasprzack and Stavros Katsanevas and Erik Katsavounidis and William Katzman and S. Kaufer and Keita Kawabe and N. V. Keerthana and F. K'ef'elian and David Keitel and Rebecca Prince Kennedy and Jason Key and F. Y. Khalili and Hasib Khan and I. Khan and Sandip Khan and Z. A. Khan and Efim A. Khazanov and M. Khursheed and N. Kijbunchoo and Chunglee Kim and Jooyoun Kim and Kwang Seok Kim and Whansun Kim and Yong-Min Kim and Chase Kimball and E. J. King and Peter King and M. Kinley-Hanlon and R Kirchhoff and J. S. Kissel and L. Kleybolte and J. H. Klika and Sergey Klimenko and T. D. Knowles and P. Koch and S. M. Koehlenbeck and G. Koekoek and Santasri Koley and Vitaliy Kondrashov and A. Kontos and N. Koper and Mikhail Korobko and W. Z. Korth and I. Kowalska and D. B. Kozak and Volker Kringel and N. V. Krishnendu and Andrzej Kr'olak and Gabriela K{\"u}hn and Arun Kumar and Pankaj Kumar and Roushan Kumar and Santosh Kumar and L. Kuo and A. Kutynia and S. Kwang and Benjamin D. Lackey and Keith Lai and Tiffany Lam and Mathieu Landry and B. B. Lane and R. N. Lang and Jens Soeren Lange and Brian Lantz and Remi Lanza and A. Lartaux-Vollard and Paul D. Lasky and M. Laxen and Albert Lazzarini and Claudia Lazzaro and Paola Leaci and S. Leavey and Y. K. Lecoeuche and C-H. Lee and Hong Kyu Lee and Han-eol Lee and H. W. Lee and J. S. H. Lee and Kyong Sei Lee and Joerg Lehmann and Amber Lenon and Nicolas Leroy and N. Letendre and Yuri Levin and Jiajun Li and Kai Long Li and Tjonnie G. F. Li and Xiaoyi Li and Feng Lin and Frank Linde and S. D. Linker and Tyson B. Littenberg and Jiwen Liu and Xuesong Liu and Rico K. L. Lo and Nicholas A. Lockerbie and Lionel London and Antonella Longo and Marco Lorenzini and Vincent Loriette and Marc Lormand and Giovanni Losurdo and James Lough and Carlos O. Lousto and Geoffrey Lovelace and Marcus E. Lower and H. Luck and Diana Lumaca and A. P. Lundgren and Renee A. Lynch and Yousi Ma and Ronaldas Macas and S. Macfoy and Myron Macinnis and D. M. Macleod and A. Macquet and Fabian Maga{\~n}a-Sandoval and Lorena Maga{\~n}a Zertuche and R. M. Magee and E. Majorana and I. Maksimovic and Abds-sami Malik and Na Man and Vuk Mandic and Vanessa Mangano and Georgia L Mansell and Magnus Manske and M. Mantovani and Fabio Marchesoni and François Marion and Szabolcs M'arka and Zsuzsa Marka and Charalampos Markakis and A. S. Markosyan and Aaron Markowitz and E. Maros and A. Marquina and Sylvain Marsat and Faustino Martelli and I. W. Martin and Richard McKelvy Martin and Denis Martynov and Karon Mason and Ettore Massera and A. Masserot and T. J. Massinger and M. Masso-Reid and Simone Mastrogiovanni and Ante Matas and Fabrice Matichard and Luca Matone and N. Mavalvala and Nirmal Mazumder and J. J. McCann and Robert Mccarthy and David E. McClelland and S. McCormick and Lee McCuller and S. C. McGuire and JamesW. McIver and D. J. McManus and Tristan McRae and S. T. McWilliams and D. Meacher and G. D. Meadors and Moritz Mehmet and Anil K Mehta and Jeroen Meidam and Andrew Melatos and Greg Mendell and R. Adam Mercer and Lorenzo Mereni and E. L. Merilh and Moufida Merzougui and S. Meshkov and Chris Messenger and Cody Messick and R. Metzdorff and P. M. Meyers and Haixing Miao and Christophe Michel and Harry Middleton and Eugeniy E. Mikhailov and Leopoldo Milano and A. L. Miller and Margaret Millhouse and J. C. Mills and Michael Milovich-Goff and Olivier Minazzoli and Yuri Minenkov and A. A. Mishkin and Chandreshwor Mishra and Trishna Mistry and Sushanta K. Mitra and V. P. Mitrofanov and Guenakh Mitselmakher and Richard Mittleman and Gui-kai Mo and D. Moffa and Kentaro Mogushi and S. R. P. Mohapatra and M. Montani and Christopher J. Moore and Daniel Moraru and Gerardo Moreno and Soichiro Morisaki and B. Mours and Conor M Mow-Lowry and Arunava Mukherjee and D. Mukherjee and Subroto Mukherjee and Nikhil Mukund and Adam Mullavey and Jessica Munch and E. A. M. Muniz and M. Muratore and Peyton Murray and Ilaria Nardecchia and Luca Naticchioni and R. K. Nayak and J. Neilson and Gijs Nelemans and T. J. N. Nelson and Mendes Nery and Ansel Neunzert and K. K. Y. Ng and Sio-kit Ng and P. Nguyen and D. Nichols and Samaya M. 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Pedraza and Richard Pedurand and Andreea Pele and S. Penn and C. J. Perez and Antonio Perreca and Harald P. Pfeiffer and M. Phelps and K. S. Phukon and O. J. Piccinni and Michael Pichot and F. Piergiovanni and Gabriel Pillant and Laurent Pinard and M. Pirello and Matthew Pitkin and R. Poggiani and D. Y. T. Pong and Surendra Ponrathnam and Pasquale Popolizio and Edward K. Porter and J. Powell and A. K. Prajapati and Jk Prasad and Kiran Prasai and Raj Prasanna and Geraint Pratten and Tanner Prestegard and Stephen Privitera and Giovanni Andrea Prodi and L. G. Prokhorov and Oliver Puncken and M. Punturo and P. Puppo and Michael Purrer and H. Qi and Volker Quetschke and Pedro Jesus Quinonez and E. A. Quintero and Ryan Quitzow-James and Francois Raab and Hugh Radkins and Nicoleta Rădulescu and Peter Raffai and S. Raja and C. Rajan and Binod Rajbhandari and Malik Rakhmanov and Karen E. Ramirez and Antoni Ramos-Buades and J Rana and K. Rao and P. Rapagnani and Vivien Raymond and Massimiliano Razzano and J. Read and Tania Regimbau and Luca Rei and Stuart Reid and David H. Reitze and W. Ren and Francesco Ricci and C. J. Richardson and James William Richardson and Paul Milton Ricker and Keith Riles and Mariantonietta Rizzo and Nathan Robertson and R. Robie and F. Robinet and Alessio Rocchi and Lucie Rolland and J. G. Rollins and V. J. Roma and Michele Romanelli and Rocco Romano and C. L. Romel and Janeen Romie and K. Rose and Dorota Rosińska and Shawn Rosofsky and M. P. Ross and Sheila Rowan and Albrecht Rudiger and P. Ruggi and G. Rutins and Kevin M. Ryan and Surabhi Sachdev and Travis Sadecki and Mairi Sakellariadou and Livio Salconi and Mohammed Saleem and Anuradha Samajdar and Letizia Sammut and Emilio J. S{\'a}nchez and L. E. Sanchez and Nicolas Sanchis-Gual and V. D. Sandberg and Joyce Sanders and Krystle Angelique Aguda Santiago and Nikhil Sarin and Beno{\^i}t Sassolas and Peter R. Saulson and O. E. S. Sauter and R. L. Savage and Paul Schale and Marc Scheel and Jacob Scheuer and Patricia Schmidt and Roman Schnabel and R. M. S. Schofield and Andreas Sch{\o}nbeck and Elmar Schreiber and Brian Schulte and Bernard F. Schutz and S. G. Schwalbe and John Scott and Samantha Scott and Ed Seidel and D. Sellers and A. S. Sengupta and Noah Sennett and Daniel Sentenac and Valeria Sequino and Aleksandr Sergeev and Y. Setyawati and Daniel A. Shaddock and T. J. Shaffer and Mohammad Shibli Shahriar and M. B. Shaner and Lijing Shao and Prateek Sharma and P Shawhan and Hong-cui Shen and R. Shink and Deirdre Shoemaker and S. Shyamsundar and Karelle Siellez and Magdalena Sieniawska and Daniel Sigg and A. D. Silva and Leo P. Singer and Neetesh Singh and Akash Singhal and Alicia M. Sintes and S. Sitmukhambetov and V. Skliris and Bram J. J. Slagmolen and Teresa Slaven-Blair and John Smith and Robert James Smith and S. N. Somala and Edwin J. Son and Borja Sorazu and François Sorrentino and Tarun Souradeep and Eric Sowell and Angie Spencer and A. K. Srivastava and V. Srivastava and Kai Staats and Cosmin Stachie and Matthias Standke and Daniele A. Steer and Mathias Steinke and Jessica Steinlechner and Siegbert Steinlechner and Daniel Steinmeyer and Samantha Stevenson and Dane Stocks and Robert Stone and D. J. Stops and Kenneth A. Strain and Giulia Stratta and S. E. Strigin and Achim Strunk and Riccardo Sturani and A. L. Stuver and Vivishek Sudhir and Tiffany Summerscales and Luyan Sun and S. Sunil and Joshua Suresh and Patrick James Sutton and B. L. Swinkels and M. J. Szczepa'nczyk and M. Tacca and S. C. Tait and Colm Talbot and Dhaniram Talukder and David B. Tanner and M'arton T'apai and Andrea Taracchini and Jay D. Tasson and Robert W Taylor and Felix Thies and Margot Thomas and Pieter Thomas and S. R. Thondapu and K. A. Thorne and Eric Thrane and Shubhanshu Tiwari and Srishti Tiwari and Vaibhav Tiwari and K. Toland and Mauro Tonelli and Z. Tornasi and Alejandro Torres-Forn'e and Calum Torrie and Daniel Toyra and Flavio Travasso and G. Traylor and M. C. Tringali and Antonio Trovato and Lucia Trozzo and R. J. Trudeau and Ka Wa Tsang and Maggie Tse and Rhondale Tso and Leo Tsukada and Daichi Tsuna and D. Tuyenbayev and Kazuma Ueno and D. Ugolini and C. S. Unnikrishnan and A. L. Urban and S. A. Usman and Henning Vahlbruch and Gabriele Vajente and Guelmes Vald{\'e}s and Niels Anton van Bakel and Martin van Beuzekom and Johannes Brand and Chris van den Broeck and Daniel Vander-Hyde and J. V. van Heijningen and L. van der Schaaf and A. A. van Veggel and Marco Vardaro and Vijay Varma and Steve Vass and M'aty'as Vas'uth and Alberto Vecchio and Gabriele Vedovato and John Veitch and Paul Veitch and K. Venkateswara and Gautam Venugopalan and D. Verkindt and Flavio Vetrano and Amadio Vicere and A. D. Viets and David John Vine and J.-Y. Vinet and Salvatore Vitale and Theodore Vo and Helios Vocca and Cheryl Vorvick and Sergey P. Vyatchanin and A. R. Wade and Leslie Wade and Madeline Wade and R. Walet and M. Walker and Lloyd Wallace and Sinead Walsh and Guiding Wang and Hulin Wang and Junfeng Wang and Wei Wang and Y. F. Wang and R. L. Ward and Z. A. Warden and J. Warner and M. Was and Jennifer Watchi and Bryce Weaver and L. W. Wei and Michael Weinert and A. J. R. Weinstein and Rainer Weiss and Florian Wellmann and Longping Wen and E. K. Wessel and P. Wessels and J. W. Westhouse and Klaus Wette and John T. Whelan and Bernard Whiting and C. Whittle and Dennis Wilken and D. Clive Williams and A. R. Williamson and Jessica L. Willis and Benno Willke and M. H. Wimmer and Walter Winkler and Christopher Wipf and Herbert Wittel and Graham Woan and Jens W{\"o}hler and J. K. Wofford and John R. Worden and J. L. Wright and D. S. Wu and Daniel Wysocki and Liting Xiao and Hiromori Yamamoto and C. C. Yancey and Lili Yang and M. J. Yap and Maher Yazback and D. W. Yeeles and Hang Yu and Haocun Yu and Steven R Yuen and M. Yvert and Adam Zadrozny and Michele Zanolin and T. Zelenova and J. P. Zendri and Michael Zevin and Jian-hui Zhang and Lixue Zhang and Tianqi Zhang and Chunnong Zhao and Minchuan Zhou and Zifan Zhou and X. J. Zhu and Michael Zucker and John George Zweizig and Andrzej Pisarski},
  journal={Physical Review D},
  • The Ligo Scientific Collaboration, T. Abbott, +1,128 authors Andrzej Pisarski
  • Published 2019
  • Physics
  • Physical Review D
  • We present results of an all-sky search for continuous gravitational waves (CWs), which can be produced by fast spinning neutron stars with an asymmetry around their rotation axis, using data from the second observing run of the Advanced LIGO detectors. Three different semicoherent methods are used to search in a gravitational-wave frequency band from 20 to 1922 Hz and a first frequency derivative from −1×10−8 to 2×10−9  Hz/s. None of these searches has found clear evidence for a CW signal, so… CONTINUE READING


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