@article{e5bfcc6586a6449a9409bdd45b3cc0cb,
title = "GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run",
abstract = "The second Gravitational-Wave Transient Catalog, GWTC-2, reported on 39 compact binary coalescences observed by the Advanced LIGO and Advanced Virgo detectors between 1 April 2019 15∶00 UTC and 1 October 2019 15∶00 UTC. Here, we present GWTC-2.1, which reports on a deeper list of candidate events observed over the same period. We analyze the final version of the strain data over this period with improved calibration and better subtraction of excess noise, which has been publicly released. We employ three matched-filter search pipelines for candidate identification, and estimate the probability of astrophysical origin for each candidate event. While GWTC-2 used a false alarm rate threshold of 2 per year, we include in GWTC-2.1, 1201 candidates that pass a false alarm rate threshold of 2 per day. We calculate the source properties of a subset of 44 high-significance candidates that have a probability of astrophysical origin greater than 0.5. Of these candidates, 36 have been reported in GWTC-2. We also calculate updated source properties for all binary black hole events previously reported in GWTC-1. If the eight additional high-significance candidates presented here are astrophysical, the mass range of events that are unambiguously identified as binary black holes (both objects ≥3M⊙) is increased compared to GWTC-2, with total masses from ∼14M⊙ for GW190924_021846 to ∼182M⊙ for GW190426_190642. Source properties calculated using our default prior suggest that the primary components of two new candidate events (GW190403_051519 and GW190426_190642) fall in the mass gap predicted by pair-instability supernova theory. We also expand the population of binaries with significantly asymmetric mass ratios reported in GWTC-2 by an additional two events (the mass ratio is less than 0.65 and 0.44 at 90% probability for GW190403_051519 and GW190917_114630 respectively), and find that two of the eight new events have effective inspiral spins χeff>0 (at 90% credibility), while no binary is consistent with χeff<0 at the same significance. We provide updated estimates for rates of binary black hole and binary neutron star coalescence in the local Universe.",
author = "{LIGO Scientific Collaboration and Virgo Collaborations} and R. Abbott and Abbott, {T. D.} and F. Acernese and K. Ackley and C. Adams and N. Adhikari and Adhikari, {R. X.} and Adya, {V. B.} and C. Affeldt and D. Agarwal and M. Agathos and K. Agatsuma and N. Aggarwal and Aguiar, {O. D.} and L. Aiello and A. Ain and P. Ajith and S. Albanesi and A. Allocca and Altin, {P. A.} and A. Amato and C. Anand and S. Anand and A. Ananyeva and Anderson, {S. B.} and Anderson, {W. G.} and T. Andrade and N. Andres and T. Andri{\'c} and Angelova, {S. V.} and S. Ansoldi and Antelis, {J. M.} and S. Antier and S. Appert and K. Arai and Araya, {M. C.} and Areeda, {J. S.} and M. Ar{\`e}ne and N. Arnaud and Aronson, {S. M.} and Arun, {K. G.} and Y. Asali and G. Ashton and M. Assiduo and Aston, {S. M.} and P. Astone and F. Aubin and C. Austin and S. Babak and F. Badaracco and Bader, {M. K.M.} and C. Badger and S. Bae and Baer, {A. M.} and S. Bagnasco and Y. Bai and J. Baird and M. Ball and G. Ballardin and Ballmer, {S. W.} and A. Balsamo and G. Baltus and S. Banagiri and D. Bankar and Barayoga, {J. C.} and C. Barbieri and Barish, {B. C.} and D. Barker and P. Barneo and F. Barone and B. Barr and L. Barsotti and M. Barsuglia and D. Barta and J. Bartlett and Barton, {M. A.} and I. Bartos and R. Bassiri and A. Basti and M. Bawaj and Bayley, {J. C.} and Baylor, {A. C.} and M. Bazzan and B. B{\'e}csy and Bedakihale, {V. M.} and M. Bejger and I. Belahcene and V. Benedetto and D. Beniwal and Bennett, {T. F.} and Bentley, {J. D.} and M. Benyaala and F. Bergamin and Berger, {B. K.} and S. Bernuzzi and Berry, {C. P.L.} and D. Bersanetti and A. Bertolini and J. Betzwieser and D. Beveridge and R. Bhandare and U. Bhardwaj and D. Bhattacharjee and S. Bhaumik and Bilenko, {I. A.} and G. Billingsley and S. Bini and R. Birney and O. Birnholtz and S. Biscans and M. Bischi and S. Biscoveanu and A. Bisht and B. Biswas and M. Bitossi and Bizouard, {M. A.} and Blackburn, {J. K.} and Blair, {C. D.} and Blair, {D. G.} and Blair, {R. M.} and F. Bobba and N. Bode and M. Boer and G. Bogaert and M. Boldrini and Bonavena, {L. D.} and F. Bondu and E. Bonilla and R. Bonnand and P. Booker and Boom, {B. A.} and R. Bork and V. Boschi and N. Bose and S. Bose and V. Bossilkov and V. Boudart and Y. Bouffanais and A. Bozzi and C. Bradaschia and Brady, {P. R.} and A. Bramley and A. Branch and M. Branchesi and Brau, {J. E.} and M. Breschi and T. Briant and Briggs, {J. H.} and A. Brillet and M. Brinkmann and P. Brockill and Brooks, {A. F.} and J. Brooks and Brown, {D. D.} and S. Brunett and G. Bruno and R. Bruntz and J. Bryant and T. Bulik and Bulten, {H. J.} and A. Buonanno and R. Buscicchio and D. Buskulic and C. Buy and Byer, {R. L.} and L. Cadonati and G. Cagnoli and C. Cahillane and Bustillo, {J. Calder{\'o}n} and Callaghan, {J. D.} and Callister, {T. A.} and E. Calloni and J. Cameron and Camp, {J. B.} and M. Canepa and S. Canevarolo and M. Cannavacciuolo and Cannon, {K. C.} and H. Cao and E. Capote and G. Carapella and F. Carbognani and Carlin, {J. B.} and Carney, {M. F.} and M. Carpinelli and G. Carrillo and G. Carullo and Carver, {T. L.} and Diaz, {J. Casanueva} and C. Casentini and G. Castaldi and S. Caudill and M. Cavagli{\`a} and F. Cavalier and R. Cavalieri and M. Ceasar and G. Cella and P. Cerd{\'a}-Dur{\'a}n and E. Cesarini and W. Chaibi and K. Chakravarti and Subrahmanya, {S. Chalathadka} and E. Champion and Chan, {C. H.} and C. Chan and Chan, {C. L.} and K. Chan and K. Chandra and P. Chanial and S. Chao and P. Charlton and Chase, {E. A.} and E. Chassande-Mottin and C. Chatterjee and Debarati Chatterjee and Deep Chatterjee and D. Chattopadhyay and M. Chaturvedi and S. Chaty and K. Chatziioannou and Chen, {H. Y.} and X. Chen and Y. Chen and Choudhary, {R. K.} and S. Choudhary and Q. Chu and Coward, {D. M.} and S. Danilishin and J. Degallaix and {Di Fronzo}, C. and Gould, {D. W.} and Howell, {E. J.} and V. Jaberianhamedan and Jones, {A. W.} and L. Ju and T. Kaur and M. Kovalam and J. Liu and McCann, {J. J.} and Neil, {B. F.} and Page, {M. A.} and Panther, {F. H.} and H. Satari and Slaven-Blair, {T. J.} and H. Sun and {Van Heijningen}, {J. V.} and Veitch, {P. J.} and L. Wen and C. Zhao and Zhu, {X. J.}",
note = "Publisher Copyright: {\textcopyright} 2024 us. ",
year = "2024",
month = jan,
day = "5",
doi = "10.1103/PhysRevD.109.022001",
language = "English",
volume = "109",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "2",
}