@article{6c0cb5e8c08846f0b4f4fd14a05295ae,
title = "Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs",
abstract = "We report results from searches for anisotropic stochastic gravitational-wave backgrounds using data from the first three observing runs of the Advanced LIGO and Advanced Virgo detectors. For the first time, we include Virgo data in our analysis and run our search with a new efficient pipeline called pystoch on data folded over one sidereal day. We use gravitational-wave radiometry (broadband and narrow band) to produce sky maps of stochastic gravitational-wave backgrounds and to search for gravitational waves from point sources. A spherical harmonic decomposition method is employed to look for gravitational-wave emission from spatially-extended sources. Neither technique found evidence of gravitational-wave signals. Hence we derive 95% confidence-level upper limit sky maps on the gravitational-wave energy flux from broadband point sources, ranging from Fα,Θ<(0.013-7.6)×10-8 erg cm-2 s-1 Hz-1, and on the (normalized) gravitational-wave energy density spectrum from extended sources, ranging from ωα,Θ<(0.57-9.3)×10-9 sr-1, depending on direction (Θ) and spectral index (α). These limits improve upon previous limits by factors of 2.9-3.5. We also set 95% confidence level upper limits on the frequency-dependent strain amplitudes of quasimonochromatic gravitational waves coming from three interesting targets, Scorpius X-1, SN 1987A and the Galactic Center, with best upper limits range from h0<(1.7-2.1)×10-25, a factor of ≥2.0 improvement compared to previous stochastic radiometer searches.",
author = "{LIGO Scientific Collaboration} and R. Abbott and Abbott, {T. D.} and S. Abraham and F. Acernese and K. Ackley and A. Adams and C. Adams 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 T. Akutsu and Aleman, {K. M.} and G. Allen and A. Allocca and Altin, {P. A.} and A. Amato and S. Anand and A. Ananyeva and Anderson, {S. B.} and Anderson, {W. G.} and M. Ando and Angelova, {S. V.} and S. Ansoldi and Antelis, {J. M.} and S. Antier and S. Appert and Koya Arai and Koji Arai and Y. Arai and S. Araki and A. Araya and Araya, {M. C.} and Areeda, {J. S.} and M. Ar{\`e}ne and N. Aritomi and N. Arnaud and Aronson, {S. M.} and H. Asada and Y. Asali and G. Ashton and Y. Aso and Aston, {S. M.} and P. Astone and F. Aubin and P. Aufmuth and K. Aultoneal and C. Austin and S. Babak and F. Badaracco and Bader, {M. K.M.} and S. Bae and Y. Bae and Baer, {A. M.} and S. Bagnasco and Y. Bai and L. Baiotti and J. Baird and R. Bajpai and M. Ball and G. Ballardin and Ballmer, {S. W.} and M. Bals and A. Balsamo and G. Baltus and S. Banagiri and D. Bankar and Bankar, {R. S.} 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 Benjamin, {M. G.} and Bennett, {T. F.} and Bentley, {J. D.} and M. Benyaala and F. Bergamin and Berger, {B. K.} and S. Bernuzzi and D. Bersanetti and A. Bertolini and J. Betzwieser and R. Bhandare and Bhandari, {A. V.} and D. Bhattacharjee and S. Bhaumik and J. Bidler and Bilenko, {I. A.} and G. Billingsley 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 J. Blackman 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 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 A. Buikema and T. Bulik and Bulten, {H. J.} and A. Buonanno and R. Buscicchio and D. Buskulic and Byer, {R. L.} and L. Cadonati and M. Caesar and G. Cagnoli and C. Cahillane and Cain, {Iii W.} and Bustillo, {J. Calder{\'o}n} and Callaghan, {J. D.} and Callister, {T. A.} and E. Calloni and Camp, {J. B.} and M. Canepa and M. Cannavacciuolo and Cannon, {K. C.} and H. Cao and J. Cao and Z. Cao and E. Capocasa and E. Capote and G. Carapella and F. Carbognani and Carlin, {J. B.} and Carney, {M. F.} and M. Carpinelli 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 G. Cella and P. Cerd{\'a}-Dur{\'a}n and E. Cesarini and W. Chaibi and K. Chakravarti and B. Champion and Chan, {C. H.} and Chan, {C. L.} and Chan, {C. L.} and M. Chan and K. Chandra and P. Chanial and S. Chao and P. Charlton and Chase, {E. A.} and E. Chassande-Mottin and D. Chatterjee and M. Chaturvedi and A. Chen and C. Chen and Chen, {H. Y.} and J. Chen and K. Chen and X. Chen and Chen, {Y. B.} and Chen, {Y. R.} and Z. Chen and H. Cheng and Cheong, {C. K.} and Cheung, {H. Y.} and Chia, {H. Y.} and F. Chiadini and Chiang, {C. Y.} and R. Chierici and A. Chincarini and Chiofalo, {M. L.} and A. Chiummo and G. Cho and Cho, {H. S.} and S. Choate and Choudhary, {R. K.} and S. Choudhary and N. Christensen",
note = "Publisher Copyright: {\textcopyright} 2021 American Physical Society. All rights reserved.",
year = "2021",
month = jul,
day = "15",
doi = "10.1103/PhysRevD.104.022005",
language = "English",
volume = "104",
pages = "1--24",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "AMER PHYSICAL SOC",
number = "2",
}