Directional Limits on Persistent Gravitational Waves from Advanced
LIGO's First Observing Run

Abbott,; and Abbott, B. P.; and Abbott, R.; and Abernathy, T. D.; and Acernese, M. R.; and Ackley, F.; and Adams, K.; and Adams, C.; and Addesso, T.; and Adhikari, P.; and Adya, R. X.; and Affeldt, V. B.; and Agathos, C.; and Agatsuma, M.; and Aggarwal, K.; and Aguiar, N.; and Aiello, O. D.; and Ain, L.; and Ajith, A.; and Allen, P.; and Allocca, B.; and Altin, A.; and Ananyeva, P. A.; and Anderson, A.; and Anderson, S. B.; and Appert, W. G.; and Arai, S.; and Araya, K.; and Areeda, M. C.; and Arnaud, J. S.; and Arun, N.; and Ascenzi, K. G.; and Ashton, S.; and Ast, G.; and Aston, M.; and Astone, S. M.; and Aufmuth, P.; and Aulbert, P.; and Avila-Alvarez, C.; and Babak, A.; and Bacon, S.; and Bader, P.; and Baker, M. K. M.; and Baldaccini, P. T.; and Ballardin, F.; and Ballmer, G.; and Barayoga, S. W.; and Barclay, J. C.; and Barish, S. E.; and Barker, B. C.; and Barone, D.; and Barr, F.; and Barsotti, B.; and Barsuglia, L.; and Barta, M.; and Bartlett, D.; and Bartos, J.; and Bassiri, I.; and Basti, R.; and Batch, A.; and Baune, J. C.; and Bavigadda, C.; and Bazzan, V.; and Beer, M.; and Bejger, C.; and Belahcene, M.; and Belgin, I.; and Bell, M.; and Berger, A. S.; and Bergmann, B. K.; and Berry, G.; and Bersanetti, C. P. L.; and Bertolini, D.; and Betzwieser, A.; and Bhagwat, J.; and Bhandare, S.; and Bilenko, R.; and Billingsley, I. A.; and Billman, G.; and Birch, C. R.; and Birney, J.; and Birnholtz, R.; and Biscans, O.; and Biscoveanu, S.; and Bisht, A. S.; and Bitossi, A.; and Biwer, M.; and Bizouard, C.; and Blackburn, M. A.; and Blackman, J. K.; and Blair, J.; and Blair, C. D.; and Blair, D. G.; and Bloemen, R. M.; and Bock, S.; and Boer, O.; and Bogaert, M.; and Bohe, G.; and Bondu, A.; and Bonnand, F.; and Boom, R.; and Bork, B. A.; and Boschi, R.; and Bose, V.; and Bouffanais, S.; and Bozzi, Y.; and Bradaschia, A.; and Brady, C.; and Braginsky, P. R.; and Branchesi, V. B.; and Brau, M.; and Briant, J. E.; and Brillet, T.; and Brinkmann, A.; and Brisson, M.; and Brockill, V.; and Broida, P.; and Brooks, J. E.; and Brown, A. F.; and Brown, D. A.; and Brown, D. D.; and Brunett, N. M.; and Buchanan, S.; and Buikema, C. C.; and Bulik, A.; and Bulten, T.; and Buonanno, H. J.; and Buskulic, A.; and Buy, D.; and Byer, C.; and Cabero, R. L.; and Cadonati, M.; and Cagnoli, L.; and Cahillane, G.; and Bustillo, C.; Calderon and Callister, J.; and Calloni, T. A.; and Camp, E.; and Campbell, J. B.; and Canepa, W.; and Cannon, M.; and Cao, K. C.; and Cao, H.; and Capano, J.; and Capocasa, C. D.; and Carbognani, E.; and Caride, F.; and Diaz, S.; Casanueva and Casentini, J.; and Caudill, C.; and Cavaglia, S.; and Cavalier, M.; and Cavalieri, F.; and Cella, R.; and Cepeda, G.; and Baiardi, C. B.; Cerboni and Cerretani, L.; and Cesarini, G.; and Chamberlin, E.; and Chan, S. J.; and Chao, M.; and Charlton, S.; and Chassande-Mottin, P.; and Cheeseboro, E.; and Chen, B. D.; and Chen, H. Y.; and Cheng, Y.; and Chincarini, H. -. P.; and Chiummo, A.; and Chmiel, A.; and Cho, T.; and Cho, H. S.; and Chow, M.; and Christensen, J. H.; and Chu, N.; and Chua, Q.; and Chua, A. J. K.; and Chung, S.; and Ciani, S.; and Clara, G.; and Clark, F.; and Cleva, J. A.; and Cocchieri, F.; and Coccia, C.; and Cohadon, E.; and Colla, P. -. F.; and Collette, A.; and Cominsky, C. G.; and Constancio, L.; J. r.,; and Conti, M.; and Cooper, L.; and Corbitt, S. J.; and Cornish, T. R.; and Corsi, N.; and Cortese, A.; and Costa, S.; and Coughlin, C. A.; and Coughlin, E.; and Coughlin, M. W.; and Coulon, S. B.; and Countryman, J. -. P.; and Couvares, S. T.; and Covas, P.; and Cowan, P. B.; and Coward, E. E.; and Cowart, D. M.; and Coyne, M. J.; and Coyne, D. C.; and Creighton, R.; and Creighton, J. D. 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doi:10.1103/PhysRevLett.118.121102

We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20-1726 Hz frequency band. Finding no evidence of gravitational waves from either point sources or a stochastic background, we set limits at 90\% confidence. For broadband point sources, we report upper limits on the gravitational wave energy flux per unit frequency in the range F-a circle minus (integral) < (0.1-56) x 10(-8) erg cm(-2) s(-1) Hz(-1) (f/25 Hz(a-1) depending on the sky location Theta and the spectral power index a. For extended sources, we report upper limits on the fractional gravitational wave energy density required to close the Universe of Omega(f,Theta < (0.39-7.6) x 10(-8) sr(-1) (f/25 Hz)(a) depending on Theta and a. Directed searches for narrowband gravitational waves from astrophysically interesting objects (Scorpius X- 1, Supernova 1987 A, and the Galactic Center) yield median frequency- dependent limits on strain amplitude of h(0) < (6.7, 5.5, and 7.0) x 10(-25), respectively, at the most sensitive detector frequencies between 130- 175 Hz. This represents a mean improvement of a factor of 2 across the band compared to previous searches of this kind for these sky locations, considering the different quantities of strain constrained in each case.

Directional Limits on Persistent Gravitational Waves from Advanced LIGO's First Observing Run

Abbott;B. P. and Abbott;R. and Abbott;T. D. and Abernathy;M. R. and Acernese;F. and Ackley;K. and Adams;C. and Adams;T. and Addesso;P. and Adhikari;R. X. and Adya;V. B. and Affeldt;C. and Agathos;M. and Agatsuma;K. and Aggarwal;N. and Aguiar;O. D. and Aiello;L. and Ain;A. and Ajith;P. and Allen;B. and Allocca;A. and Altin;P. A. and Ananyeva;A. and Anderson;S. B. and Anderson;W. G. and Appert;S. and Arai;K. and Araya;M. C. and Areeda;J. S. and Arnaud;N. and Arun;K. G. and Ascenzi;S. and Ashton;G. and Ast;M. and Aston;S. M. and Astone;P. and Aufmuth;P. and Aulbert;C. and Avila-Alvarez;A. and Babak;S. and Bacon;P. and Bader;M. K. M. and Baker;P. T. and Baldaccini;F. and Ballardin;G. and Ballmer;S. W. and Barayoga;J. C. and Barclay;S. E. and Barish;B. C. and Barker;D. and Barone;F. and Barr;B. and Barsotti;L. and Barsuglia;M. and Barta;D. and Bartlett;J. and Bartos;I. and Bassiri;R. and Basti;A. and Batch;J. 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Directional Limits on Persistent Gravitational Waves from Advanced LIGO's First Observing Run

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