UNIDEF   23986
UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICO PARA LA DEFENSA
Unidad Ejecutora - UE
artículos
Título:
Search of the Orion spur for continuous gravitational waves using a loosely coherent algorithm on data from LIGO interferometers
Autor/es:
E. DOMINGUEZ ET AL
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
American Physical Society
Referencias:
Año: 2015
ISSN:
0556-2821
Resumen:
We report results of a wideband search for periodic gravitational waves from isolated neutron starswithin the Orion spur towards both the inner and outer regions of our Galaxy. As gravitationalwaves interact very weakly with matter, the search is unimpeded by dust and concentrations ofstars. One search disk (A) is 6:87 in diameter and centered on 20h10m54:71s + 3333025:2900, andthe other (B) is 7:45 in diameter and centered on 8h35m20:61s 􀀀 4649025:15100. We explored thefrequency range of 50-1500 Hz and frequency derivative from 0 to 􀀀5 10􀀀9 Hz/s. A multi-stage,loosely coherent search program allowed probing more deeply than before in these two regions, whileincreasing coherence length with every stage.Rigorous followup parameters have winnowed initial coincidence set to only 70 candidates, tobe examined manually. None of those 70 candidates proved to be consistent with an isolatedgravitational wave emitter, and 95% condence level upper limits were placed on continuous-wavestrain amplitudes. Near 169 Hz we achieve our lowest 95% CL upper limit on worst-case linearlypolarized strain amplitude h0 of 6:310􀀀25, while at the high end of our frequency range we achievea worst-case upper limit of 3:4 10􀀀24 for all polarizations and sky locations.