Presentation is loading. Please wait.

Presentation is loading. Please wait.

8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 1 Directional Stochastic Search: a Gravitational Wave Radiometer Stefan Ballmer Massachusetts.

Published byBernard Kelly Modified over 8 years ago

Similar presentations

Presentation on theme: "8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 1 Directional Stochastic Search: a Gravitational Wave Radiometer Stefan Ballmer Massachusetts."— Presentation transcript:

1 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 1 Directional Stochastic Search: a Gravitational Wave Radiometer Stefan Ballmer Massachusetts Institute of Technology LIGO Hanford Observatory

2 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 2 The idea 2-site full-sky stochastic search is limited to lower frequency  higher frequencies (>~100Hz) average out in source position integration But the nearby universe is not isotropic:  Our galactic center  Nearest galaxy: M31 Andromeda  Virgo galaxy cluster  Voids  Compare different sky patches! We can get source position information from:  Signal time delay between different sites (sidereal time dependent)  Sidereal variation of the antenna pattern  Recipe: time-shift and cross-correlate!

3 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 3 Signal and Noise: Matched Filtering Use sidereal time & sky position dependent optimal filter: where Following notation of gr-qc/9710117

4 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 4 The antenna pattern DC part Look at frequency independent (geometric) part first: Interpretation:  Power coupling loss relative to 2 permanently optimally aligned detectors How bad is it for existing interferometers?

5 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 5  DC for various targets ObjectLHO-LLOLHO-VIRGOLLO-VIRGO Galactic center0.1890.2560.251 M31 Andromeda0.1580.2960.231 M810.0640.4650.114 M87 Virgo cluster0.2020.2520.262

6 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 6 Coupling from other sky directions Antenna pattern, DC part  DC

7 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 7 The antenna pattern for a flat spectrum Optimal filter (and therefore spatial resolution in the sky) depends on:  Detector power spectra (known)  Frequency content of expected signal (not known) Source modeling possible, but arguably the simplest assumption is a flat signal spectrum  For this case and assuming the LIGO SRD curve (shape only) we can calculate the full antenna pattern.

8 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 8 The antenna pattern for a flat spectrum  DC

9 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 9 The sensitivity Again for a flat signal spectrum we have For 2 interferometers at the current H1 sensitivity this is

10 8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 10 The work to do Implementation Almost identical to current Stochastic pipeline  Only modification: time-dependent overlap reduction function

Download ppt "8/13/2004 Stefan Ballmer, MIT / LIGO Hanford G040339-00-0 1 Directional Stochastic Search: a Gravitational Wave Radiometer Stefan Ballmer Massachusetts."

Similar presentations

A walk through some statistic details of LSC results.

A walk through some statistic details of LSC results.
8/13/2004 Stefan Ballmer, MIT / LIGO Hanford 1 Length and angular control loops in LIGO Stefan Ballmer Massachusetts Institute of Technology LIGO Hanford.

8/13/2004 Stefan Ballmer, MIT / LIGO Hanford 1 Length and angular control loops in LIGO Stefan Ballmer Massachusetts Institute of Technology LIGO Hanford.
LIGO- G030686-01-Z Optimally Combining the Hanford Interferometer Strain Channels Albert Lazzarini LIGO Laboratory Caltech S. Bose, P. Fritschel, M. McHugh,

LIGO- G Z Optimally Combining the Hanford Interferometer Strain Channels Albert Lazzarini LIGO Laboratory Caltech S. Bose, P. Fritschel, M. McHugh,
Broadband Search for Continuous-Wave Gravitation Radiation with LIGO Vladimir Dergachev (University of Michigan) LIGO Scientific Collaboration APS meeting,

Broadband Search for Continuous-Wave Gravitation Radiation with LIGO Vladimir Dergachev (University of Michigan) LIGO Scientific Collaboration APS meeting,
GWDAW-8 (December 17-20, 2003, Milwaukee, Wisconsin, USA) Search for burst gravitational waves with TAMA data Masaki Ando Department of Physics, University.

GWDAW-8 (December 17-20, 2003, Milwaukee, Wisconsin, USA) Search for burst gravitational waves with TAMA data Masaki Ando Department of Physics, University.
1 Science Opportunities for Australia Advanced LIGO Barry Barish Director, LIGO Canberra, Australia 16-Sept-03 LIGO-G030506-00-M.

1 Science Opportunities for Australia Advanced LIGO Barry Barish Director, LIGO Canberra, Australia 16-Sept-03 LIGO-G M.
LIGO-G050002-00-Z how to find gravity waves with your home PC Michael Landry LIGO Hanford Observatory California Institute of Technology.

LIGO-G Z how to find gravity waves with your home PC Michael Landry LIGO Hanford Observatory California Institute of Technology.
1 Observing the Most Violent Events in the Universe Virgo Barry Barish Director, LIGO Virgo Inauguration 23-July-03 Cascina 2003.

1 Observing the Most Violent Events in the Universe Virgo Barry Barish Director, LIGO Virgo Inauguration 23-July-03 Cascina 2003.
July 13, 2007 Robert Ward, Caltech LIGO-G070406-00-Z 1 Robert Ward for the LIGO Scientific Collaboration Amaldi 7 Sydney, Australia July 2007 A Radiometer.

July 13, 2007 Robert Ward, Caltech LIGO-G Z 1 Robert Ward for the LIGO Scientific Collaboration Amaldi 7 Sydney, Australia July 2007 A Radiometer.
Brennan Ireland Rochester Institute of Technology Astrophysical Sciences and Technology December 5, 2013 LIGO: Laser Interferometer Gravitational-wave.

Brennan Ireland Rochester Institute of Technology Astrophysical Sciences and Technology December 5, 2013 LIGO: Laser Interferometer Gravitational-wave.
Gravitational Wave Detectors: new eyes for physics and astronomy Gabriela González Department of Physics and Astronomy Louisiana State University.

Gravitational Wave Detectors: new eyes for physics and astronomy Gabriela González Department of Physics and Astronomy Louisiana State University.
LIGO-G030691-00-Z Coherent Coincident Analysis of LIGO Burst Candidates Laura Cadonati Massachusetts Institute of Technology LIGO Scientific Collaboration.

LIGO-G Z Coherent Coincident Analysis of LIGO Burst Candidates Laura Cadonati Massachusetts Institute of Technology LIGO Scientific Collaboration.
Systematic effects in gravitational-wave data analysis

Systematic effects in gravitational-wave data analysis
1/25 Current results and future scenarios for gravitational wave’s stochastic background G. Cella – INFN sez. Pisa.

1/25 Current results and future scenarios for gravitational wave’s stochastic background G. Cella – INFN sez. Pisa.
LIGO-G070448-01-Z A directed search for gravitational waves from Cassiopeia A Karl Wette for the LIGO Scientific Collaboration Amaldi 2007, Sydney, Australia.

LIGO-G Z A directed search for gravitational waves from Cassiopeia A Karl Wette for the LIGO Scientific Collaboration Amaldi 2007, Sydney, Australia.
Paris, July 17, 2009 RECENT RESULTS OF THE IGEC2 COLLABORATION SEARCH FOR GRAVITATIONAL WAVE BURST Massimo Visco on behalf of the IGEC2 Collaboration.

Paris, July 17, 2009 RECENT RESULTS OF THE IGEC2 COLLABORATION SEARCH FOR GRAVITATIONAL WAVE BURST Massimo Visco on behalf of the IGEC2 Collaboration.
Status of LIGO Data Analysis Gabriela González Department of Physics and Astronomy Louisiana State University for the LIGO Scientific Collaboration Dec.

Status of LIGO Data Analysis Gabriela González Department of Physics and Astronomy Louisiana State University for the LIGO Scientific Collaboration Dec.
LIGO- G040230-00-D Status of LIGO Stan Whitcomb ACIGA Workshop 21 April 2004.

LIGO- G D Status of LIGO Stan Whitcomb ACIGA Workshop 21 April 2004.
Silvia Poggi - GW burst detection strategy in non-homogeneus networks Detection strategies for bursts in networks of non-homogeneus gravitational waves.

Silvia Poggi - GW burst detection strategy in non-homogeneus networks Detection strategies for bursts in networks of non-homogeneus gravitational waves.
A coherent null stream consistency test for gravitational wave bursts Antony Searle (ANU) in collaboration with Shourov Chatterji, Albert Lazzarini, Leo.

A coherent null stream consistency test for gravitational wave bursts Antony Searle (ANU) in collaboration with Shourov Chatterji, Albert Lazzarini, Leo.

Similar presentations

Ads by Google