First joint observation by the underground gravitational-wave detector KAGRA with GEO 600

KAGRA Collaboration, LIGO Scientific Collaboration, Virgo Collaboration

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We report the results of the first joint observation of the KAGRA detector with GEO600. KAGRA is a cryogenic and underground gravitational-wave detector consisting of a laser interferometer with 3km arms, located in Kamioka, Gifu, Japan. GEO600 is a British-German laser interferometer with 600m arms, located near Hannover, Germany. GEO600 and KAGRA performed a joint observing run from April 7 to 20, 2020. We present the results of the joint analysis of the GEO-KAGRA data for transient gravitational-wave signals, including the coalescence of neutron-star binaries and generic unmodeled transients. We also perform dedicated searches for binary coalescence signals and generic transients associated with gamma-ray burst events observed during the joint run. No gravitational-wave events were identified. We evaluate the minimum detectable amplitude for various types of transient signals and the spacetime volume for which the network is sensitive to binary neutron-star coalescences. We also place lower limits on the distances to the gamma-ray bursts analyzed based on the non-detection of an associated gravitational-wave signal for several signal models, including binary coalescences. These analyses demonstrate the feasibility and utility of KAGRA as a member of the global gravitational-wave detector network.
Original languageEnglish
Article number063F01
Number of pages37
JournalProgress of Theoretical and Experimental Physics
Volume2022
Issue number6
DOIs
Publication statusPublished - 9 Jun 2022

Keywords

  • F31
  • F32
  • F33
  • F34
  • GAMMA-RAY BURST
  • BINARY NEUTRON-STAR
  • 2ND OBSERVING RUN
  • ADVANCED LIGO
  • PRECURSOR ACTIVITY
  • RELATIVISTIC JETS
  • SEARCH TEMPLATES
  • HUBBLE CONSTANT
  • X-RAY
  • FERMI

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