Principal Investigators: Bernard Schutz, Bruce Allen, Gerhard Schaefer

*The goal of this project is the development of methods for the extraction
of information from gravitational wave signals.
In the next phase of this project, methods for eliminating spurious
coincidences with great confidence will be extended to the implementation
of optimal methods for signal detection and parameter extraction from
networks of both interferometric and bar detectors.
The search methods for gravitational wave pulsars will be optimized in
the context of the Einstein search engine.
*

The goal of this project is the development of methods for the extraction of information from gravitational wave signals. Now that both the LIGO and GEO detectors have begun long observing runs, and the VIRGO detector is expected to join them soon, it is of key importance to develop the most sensitive possible signal-recognition methods for networks of detectors. In the first phase of this project, methods for eliminating spurious coincidences with great confidence have been developed, and these are now in use in the analysis of data. In the next phase of this project, these methods will be extended to the implementation of optimal methods for signal detection and parameter extraction from networks of both interferometric and bar detectors. In addition, new methods will be developed for the optimization of the most difficult search of all: the all-sky blind search for signals from gravitational wave pulsars. Finally, we will investigate methods that combine stochastic and analytic methods into effective detectors for poorly modelled sources.

The optimum detection and parameter extraction methods for networks will be aimed at determining positions, periods, and spindown rates of gravitational wave pulsars; positions, masses, and spins of merging binaries of neutron stars and black holes; and final masses and spins of black holes formed by mergers. More generally, these methods will also be applied to the problem of the approximate reconstruction of signals from unexpected sources, whose waveforms are not known in advance.

The search methods for gravitational wave pulsars will be optimized in the context of the Einstein search engine. This remarkable distributed computing project --- a screen-saver that uses individual PCs to do parts of a much larger search --- is the largest computing facility available for gravitational wave data analysis. By optimizing the search algorithms for the particular characteristics of such a massively parallel computer, it will be possible to markedly increase the sensitivity of the network of computers to these sources.

Bruce Allen | Professor, PI 2007 | ||

Ralph Neuhaeuser | Professor, PI 2010 | ||

Iraj Gholami | Postdoc, 2007 | ||

Maria Alessandra Papa | Professor, | ||

Dirk Puetzfeld | Postdoc, 2008 | ||

Former Associates | |||

Guillaume Faye | Advisor, 2004-2010 | ||

Henning Kempka | Student, 2004 | ||

S Mukherjee | Postdoc, 2003-2003 | ||

Maria Alessandra Papa | Professor, PI 2003-2004 | ||

Markus Hohle | PhD Student, 2007-2011 | ||

Markus Hohle | Postdoc, 2011-2013 | ||

Anna Pannicke | PhD Student, 2013-2014 | ||

Thomas Runst | P.D., 2003-2003 | ||

Gerhard Schaefer | Professor, PI 2003-2010 | ||

Hans-Juergen Schmeisser | Professor, PI 2003-2006 | ||

Bernard Schutz | Professor, PI 2003-2010 | ||

Winfried Sickel | P.D., 2003-2003 | ||

Nina Tetzlaff | PhD Student, 2009-2012 | ||

Nina Tetzlaff | Postdoc, 2012-2013 |

[1]
*Supernova SN 1006 in two historic Yemeni reports*

Rada W. & Neuhaeuser R.,
Astronomische Nachrichten, submitted (2014)

[2]
*Determination of a temporally and spatially resolved supernova rate from OB-stars within 5 kpc*

Schmidt J., Hohle M.M., Neuhaeuser R.,
Astronomische Nachrichten 335, 935-948, 2014

[3]
*The Vela Pulsar with an Active Fallback Disk*

Oezsuekan G., Eksi K.Y., Hambaryan V.V.. Neuhaeuser R., Hohle M.M., Ginski C., Werner K.,
Astrophysical Journal 796, 46-61 (2014)

[4]
*New Radial Velocities for 30 Candidate Runaway Stars and a Possible Binary Supernova Origin for HIP 9470 and PSR J0152-1637*

Tetzlaff N., Torres G., Neuhaeuser R., Bieryla A.,
Astronomische Nachrichten 335, 981-991 (2014)

[5]
*The origin of the young pulsar PSR~J0826+2637 and its possible former companion HIP 13962*

Tetzlaff N., Dincel B., Neuhaeuser R., Kovtyukh V.V.,
Monthly Notices of the Royal Astronomical Society 438, 3587-3593 (2014)

[6]
*The neutron star born in the Antlia supernova remnant*

Tetzlaff N., Torres G., Neuhaeuser R., Hohle M.M.,
Monthly Notices of the Royal Astronomical Society 435, 879-884 (2013)

[7]
*Narrow absorption features in the co-added XMM-Newton RGS spectra of isolated Neutron Stars*

M. M. Hohle, F. Haberl, J. Vink, C. P. de Vries, R. Neuhaeuser,
Monthly Notices of the Royal Astronomical Society 419, 1525-1536 (2012).

[8]
*The origin of RX J1856.5-3754 and RX J0720.4-3125 - updated using new parallax measurements*

Tetzlaff N., Eisenbeiss T., Neuhaeuser R., Hohle M.M.,
Monthly Notices of the Royal Astronomical Society 417, 617-626 (2011)

[9]
*A catalogue of young runaway stars within 3 kpc from Hipparcos*

Tetzlaff N., Neuhaeuser R., Hohle M.M.,
Monthly Notices of the Royal Astronomical Society 410, 190-200 (2011)

[10]
*Multipolar equations of motion for extended bodies in general relativity*

J. Steinhoff and D. Puetzfeld,
Phys. Rev. D 81, 044019

[11]
*Masses and luminosities of O- and B-type stars and red super giants*

M.M. Hohle, R. Neuhaeuser, B.F. Schutz,
Astronomische Nachrichten 331, 349 (2010)

[12]
*Exploiting global correlations to detect continuous gravitational waves*

H. Pletsch and B. Allen,
Phys. Rev. Lett. 103, 181802 (2009)

[13]
*Einstein@Home search for periodic gravitational waves in early S5 LIGO data*

B. Abbott et al. (The LIGO Scientific Collaboration),
Phys. Rev. D 80, 042003 (2009)

[14]
*The Einstein@Home search for periodic gravitational waves in LIGO S4 data*

B. Abbott et al. (The LIGO Scientific Collaboration),
Phys. Rev. D 79, 022001 (2009)

[15]
*Blandfordâ€™s Argument: The Strongest Continuous Gravitational Wave Signal*

B. Knispel, and B. Allen,
Phys. Rev. D 78 044031 (2008)

[16]
*Motion of test bodies in theories with non-minimal coupling*

D. Puetzfeld and D. Obukhov,
Phys. Rev. D 78 121501 (2008)

[17]
*Probing non-Riemannian spacetime geometry*

D. Puetzfeld and D. Obukhov,
Phys. Lett. A 372, 6711 (2008)

[18]
*Detecting gravitational wave emission from the known accreting neutron stars*

A.L.Watts, B.Krishnan, L.Bildsten, and B.F.Schutz,
Monthly Notices of the Royal Astronomical Society, 389, 839-868 (2008)

[19]
*Computational aspects of a method of stochastic approximation*

K. Runovski, I. Rystsov, H.-J. Schmeisser,
to appear in Zeitschrift Anal. und Anwendungen

[20]
*Coherent Network Detection of Gravitational Waves: The Redundancy Veto*

L. Wen, B. F. Schutz,
Class. Quant. Grav. 22

[21]
*The generalized F-statistic: multiple detectors and multiple GW pulsars*

C. Cutler, B. F. Schutz,
Phys. Rev. D 72 (2005)

[22]
*Identifying birth places of young neutron stars to determine their kinematic ages*

Tetzlaff N.,
PhD Thesis (2013)

[23]
*Search for new neutron stars in the XMM Newton source catalog*

Trepl L.,
PhD Thesis (2012)