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1. A template bank to search for gravitational waves from inspiralling compact binaries: I. Physical models

Author

Stanislav Babak, R. Balasubramanian, Bangalore Suryanarayana Sathyaprakash, Thomas Cokelaer, and D. Churches

Subjects
Physics, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), Gravitational wave, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Binary number, Primordial black hole, General Relativity and Quantum Cosmology (gr-qc), Astrophysics, General Relativity and Quantum Cosmology, LIGO, Black hole, Neutron star, Binary black hole
Abstract

Gravitational waves from coalescing compact binaries are searched using the matched filtering technique. As the model waveform depends on a number of parameters, it is necessary to filter the data through a template bank covering the astrophysically interesting region of the parameter space. The choice of templates is defined by the maximum allowed drop in signal-to-noise ratio due to the discreteness of the template bank. In this paper we describe the template-bank algorithm that was used in the analysis of data from the Laser Interferometer Gravitational Wave Observatory (LIGO) and GEO 600 detectors to search for signals from binaries consisting of non-spinning compact objects. Using Monte-Carlo simulations, we study the efficiency of the bank and show that its performance is satisfactory for the design sensitivity curves of ground-based interferometric gravitational wave detectors GEO 600, initial LIGO, advanced LIGO and Virgo. The bank is efficient to search for various compact binaries such as binary primordial black holes, binary neutron stars, binary black holes, as well as a mixed binary consisting of a non-spinning black hole and a neutron star., 22 pages, 22 figures, This version incorporates minor modifications with respect to v4

Published
2006
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2. The GEO-HF project

Author

C. A. Cantley, C. Robinson, Benjamin William Allen, Karsten Danzmann, L. Ribichini, Boris Hage, Gerhard Heinzel, Benno Willke, T. Regimbau, B. Barr, A. Grant, S. H. Huttner, S. Babak, Roland Schilling, R. Balasubramanian, Manuel Luna, Yousuke Itoh, C. Aulbert, U. Weiland, Roman Schnabel, D. Churches, V. Re, C. Messenger, Soumya D. Mohanty, Martin Hewitson, Ik Siong Heng, Richard J. K. Taylor, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, Gianpietro Cagnoli, J. R. Smith, R. J. Dupuis, Ian Taylor, Badri Krishnan, C. N. Colacino, M. Malec, Kenneth A. Strain, R. A. Mercer, Karsten Kötter, Yi Chen, Frank Seifert, T. Meier, G. Newton, Alberto Vecchio, Carsten Fallnich, Stefan Hild, Peter Aufmuth, A. Hepstonstall, S. Berukoff, I. Gholami, Walter Winkler, Harald Lück, M. V. Plissi, D. I. Robertson, Hartmut Grote, Henning Vahlbruch, P. Ajith, A. Bunkowski, Stefan Goßler, S. Grunewald, Linqing Wen, Herbert Welling, Alexander Franzen, Graham Woan, Stuart Reid, Thomas Cokelaer, Joseph D. Romano, H. Rehbein, Bernard F. Schutz, Kasem Mossavi, Soma Mukherjee, Jan Harms, P. G. Murray, Andreas Freise, J. H. Hough, Matthew Pitkin, Michael Perreur-Lloyd, P. Kwee, A. M. Sintes, Andre Thüring, E. J. Elliffe, N. A. Robertson, Gareth Jones, B. Machenschalk, R. Zhu, Carlo Ungarelli, Sheila Rowan, Simon Chelkowski, Curt Cutler, H. Ward, John Veitch, Reinhard Prix, Peter H. Sneddon, P. Williams, Roger Jones, Maria Alessandra Papa, Albrecht Rüdiger, David Crooks, Morag M. Casey, and M. Heurs

Subjects
Physics, Upgrade, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), Work (electrical), Emerging technologies, Scale (chemistry), SIGNAL (programming language), Detector, Systems engineering, LIGO
Abstract

The GEO 600 gravitational wave detector uses advanced technologies including signal recycling and monolithic fused-silica suspensions to achieve a sensitivity close to the kilometre scale LIGO and VIRGO detectors. As soon as the design sensitivity of GEO 600 is reached, the detector will be operated as part of the worldwide network to acquire data of scientific interest. The limited infrastructure at the GEO site does not allow for a major upgrade of the detector. Hence the GEO collaboration decided to improve the sensitivity of the GEO detector by small sequential upgrades some of which will be tested in prototypes first. The development, test and installation of these upgrades are named 'The GEO-HF Project.' This paper describes the upgrades considered in the GEO-HF project as well as their scientific reasons. We will describe the changes in the GEO 600 infrastructure and the prototype work that is planned to support these upgrades. Finally, we will point to some laboratory research that identifies new technologies or optical configurations that might undergo a transition into detector subsystems within the GEO-HF project.

Published
2006
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3. Status of the GEO600 detector

Author

S. J. Berukoff, S. H. Huttner, B. Barr, P. G. Murray, Roland Schilling, Peter Aufmuth, T. Meier, Reinhard Prix, G. Newton, Roman Schnabel, J. H. Hough, Gerhard Heinzel, Alberto Vecchio, Sheila Rowan, Benno Willke, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, H. Ward, Graham Woan, Stuart Reid, D. Churches, J. R. Smith, Maria Alessandra Papa, A. Hepstonstall, Curt Cutler, Ian Taylor, Jan Harms, D. I. Robertson, Bernard F. Schutz, Morag M. Casey, M. Heurs, Albrecht Rüdiger, N. A. Robertson, A. Bunkowski, R. Zhu, A. Thüring, F. Seifert, Thomas Cokelaer, John Veitch, C. A. Cantley, Karsten Kötter, C. Robinson, Gareth Jones, Stefan Goßler, B. Machenschalk, Benjamin William Allen, Karsten Danzmann, Carlo Ungarelli, Peter H. Sneddon, R. Balasubramanian, M. V. Plissi, Carsten Fallnich, Stefan Hild, Stanislav Babak, Soma Mukherjee, V. Re, A. M. Sintes, Herbert Welling, S. Grunewald, Roger Jones, Simon Chelkowski, Hartmut Grote, A. Franzen, C. Messenger, L. Ribichini, U. Weiland, H. Rehbein, Andreas Freise, H. Vahlbruch, Walter Winkler, Harald Lück, Matthew Pitkin, Michael Perreur-Lloyd, Kenneth A. Strain, R. A. Mercer, P. R. Williams, P. Ajith, David Crooks, Yousuke Itoh, Ik Siong Heng, I. Gholami, R. J. Dupuis, Richard J. K. Taylor, Gianpietro Cagnoli, Martin Hewitson, A. Grant, E. J. Elliffe, T. Regimbau, Soumya D. Mohanty, Boris Hage, Linqing Wen, Joseph D. Romano, Kasem Mossavi, C. N. Colacino, M. Malec, Yi Chen, Manuel Luna, Badri Krishnan, P. Kwee, and C. Aulbert

Subjects
Physics, Optics, Physics and Astronomy (miscellaneous), business.industry, Duty cycle, Detector, business, GEO600, Sensitivity (electronics)
Abstract

Of all the large interferometric gravitational-wave detectors, the German/British project GEO600 is the only one which uses dual recycling. During the four weeks of the international S4 data-taking run it reached an instrumental duty cycle of 97% with a peak sensitivity of 7 × 10-22 Hz-1/2 at 1 kHz. This paper describes the status during S4 and improvements thereafter.

Published
2006
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4. A report on the status of the GEO 600 gravitational wave detector

Author

Sheila Rowan, Alberto Vecchio, H. Ward, B. Barr, Roland Schilling, A. Hepstonstall, Gerhard Heinzel, Benno Willke, L. Ribichini, Karsten Kötter, Oliver Jennrich, Graham Woan, Kasem Mossavi, Stuart Reid, Soumya D. Mohanty, Carsten Fallnich, Bernard F. Schutz, Gianpietro Cagnoli, P. Williams, Roman Schnabel, N. A. Robertson, C. N. Colacino, Andreas Freise, Matthew Pitkin, Michael Perreur-Lloyd, M. Malec, Martin Hewitson, Curt Cutler, D. Churches, M. V. Plissi, I. Zawischa, E. J. Elliffe, Badri Krishnan, Hartmut Grote, C. I. Torrie, Jan Harms, Peter H. Sneddon, S. Hutter, B. Machenschalk, Soma Mukherjee, Roger Jones, Frank Seifert, C. A. Cantley, K. Kawabe, Karsten Danzmann, Stanislav B. Babak, D. I. Robertson, J. H. Hough, Simon Chelkowski, Morag M. Casey, M. Heurs, R. Davies, R. J. Dupuis, Ian Taylor, Walter Winkler, Harald Lück, Maria Alessandra Papa, A. Grant, David Crooks, Albrecht Rüdiger, Stefan Goßler, Christian J. Killow, Herbert Welling, Yousuke Itoh, S. Grunewald, Shigeo Nagano, S. Berukoff, U. Weiland, G. P. Newton, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, J. R. Smith, R. Balasubramanian, C. Aulbert, V. Leonhardt, Peter Aufmuth, Kenneth A. Strain, S. Heng, and A. M. Sintes

Subjects
Physics, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, business.industry, Detector, Pendulum, LIGO, Optics, Coincident, Interferometric gravitational wave detector, Sensitivity (control systems), Focus (optics), business
Abstract

GEO 600 is an interferometric gravitational wave detector with 600 m arms, which will employ a novel, dual-recycled optical scheme allowing its optical response to be tuned over a range of frequencies (from ~100 Hz to a few kHz). Additional advanced technologies, such as multiple pendulum suspensions with monolithic bottom stages, make the anticipated sensitivity of GEO 600 comparable to initial detectors with kilometre arm lengths. This paper discusses briefly the design of GEO, reports on the status of the detector up to the end of 2002 with particular focus on participation in coincident engineering and science runs with LIGO detectors. The plans leading to a fully optimized detector and participation in future coincident science runs are briefly outlined.

Published
2003
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5. The GEO 600 gravitational wave detector

Author

Peter H. Sneddon, P. Williams, C. Aulbert, K. Kawabe, R. Senior, V. Leonhardt, Maria Alessandra Papa, Andreas Freise, R. Davies, Harald Lück, Albrecht Rüdiger, B. Barr, H. Welling, I. Zawischa, Roland Schilling, Soma Mukherjee, A. Heptonstall, C. I. Torrie, G. Newton, Stefan Goßler, Alberto Vecchio, Karsten Kötter, H. Ward, Oliver Jennrich, Carsten Fallnich, Karsten Danzmann, Curt Cutler, F. Stief, N. A. Robertson, Kenneth D. Skeldon, Gerhard Heinzel, S. McIntosh, Walter Winkler, Soumya D. Mohanty, Sheila Rowan, Benno Willke, D. A. Palmer, Gianpietro Cagnoli, J. H. Hough, Benjamin J. Owen, S. Nagano, M. Malec, Martin Hewitson, Alicia M. Sintes, A. Grant, D. I. Robertson, Suvadeep Bose, Ian Taylor, Graham Woan, V. Quetschke, Bangalore Suryanarayana Sathyaprakash, Bernard F. Schutz, C. N. Colacino, R. J. Dupuis, D. Churches, U. Weiland, D.A Clubley, Stanislav Babak, S. Berukoff, P. McNamara, R. Balasubramanian, Kasem Mossavi, E. J. Elliffe, Peter Aufmuth, David Crooks, Kenneth A. Strain, M. V. Plissi, Morag M. Casey, M. Heurs, and Hartmut Grote

Subjects
Physics, Interferometry, Optics, Gravitational-wave observatory, Physics and Astronomy (miscellaneous), Gravitational wave, business.industry, Detector, Pendulum, Sensitivity (control systems), business, Signal, GEO600
Abstract

The GEO 600 laser interferometer with 600 m armlength is part of a worldwide network of gravitational wave detectors. Due to the use of advanced technologies like multiple pendulum suspensions with a monolithic last stage and signal recycling, the anticipated sensitivity of GEO 600 is close to the initial sensitivity of detectors with several kilometres armlength. This paper describes the subsystems of GEO 600, the status of the detector by September 2001 and the plans towards the first science run.

Published
2002
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6. Status of the GEO600 detector.

Author

H Lck, M Hewitson, P Ajith, B Allen, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, A Bunkowski, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, Y Chen, D Churches, T Cokelaer, C N Colacino, and D R M Crooks

Published
2006

7. The GEO-HF project.

Author

B Willke, P Ajith, B Allen, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, A Bunkowski, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, Y Chen, D Churches, T Cokelaer, C N Colacino, D R M Crooks, and C Cutler

Published
2006

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