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  • LIGO S1 papers
    the Strength of Periodic Gravitational Waves Using the First Science Data from the GEO600 and LIGO Detectors Detector Description and Performance for the First Coincidence Observations Between LIGO and GEO Analysis of LIGO Data for Gravitational Waves from Binary Neutron

    Original URL path: http://www.ligo.caltech.edu/LIGO_web/s1/ (2015-06-03)
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  • APS April 2003 Meeting: GGR/GFC section [GW Detection with LIGO]
    Limits on the Rate of Gravitational Wave Bursts from the First LIGO Science Run Edward Daw Louisiana State U Analysis of the First LIGO Data Erik Katsavounidis MIT First Results for Stochastic Gravitational Wave Searches Using LIGO Data Joseph Romano U of Texas Brownsville LIGO and GEO Developments for Advanced LIGO Sheila Rowan Stanford Scientific Operation of LIGO Gary Sanders Caltech Press Conferences Press Conference on the Analysis of the

    Original URL path: http://www.ligo.caltech.edu/LIGO_web/aps0403/ (2015-06-03)
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  • LIGO Scientific Collaboration Working Group on BURST SOURCES
    calendar 2005 Meeting Agendas and Minutes 2004 Meeting Agendas and Minutes Meeting Minutes from 2003 and earlier Also here Progress reports and other informal notes through May 2004 See e notebooks for more recent work Selected papers of interest to the burst group Notes on Data analysis LDAS LIGO Data Analysis System web page LDAS Bulletin Board LAL LIGO LSC Analysis Library Web Page LSC ASIS Astrophysical Source Identification and Signatures Web page LIGOTools Web Page LDAS LAL Software Specifications LAL Software documentation LALWrapper Software documentation LDAS preliminary Design Document LDAS Wrapper API Requirements and Implementation LSC Working Group to Revise the Data Analysis White Paper LSC Detection Confidence and Statistical Analysis working group LSC Detector Characterization Working Group LIGO Engineering Run Home Page LIGO HPSS Frame Archive Ed Daw s instructions for building the DMT package from the CVS repository Laura Cadonati s EventTool tutorials Event Tool Quick Start Ito and Sigg 1 22 02 Event Tool source code documentation GDS build instructions Rahkola 2 12 02 GDS DMT web page DMTSandbox Library documentation ROOT Home Page and ROOT Classes Index MIT Group Burst Analysis Web Page MIT Data analysis web page eNotes on Bursts Filters etc Using CVS

    Original URL path: http://www.ligo.caltech.edu/~ajw/bursts/bursts.html (2015-06-03)
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  • An S1 Special Report
    better sensitivity in the critical band from 100 to 400 Hz Shown the historical progression of the strain sensitivity in the 4 km interferometer at LLO The spectrum labeled 6 13 02 is typical of the best performance during the S1 run Ground motion at LLO has been the major limiting factor in our ability to lock the interferometer This aggravating seismic noise occurs almost exclusively during the day and peaks in the 1 3 Hz region It arises primarily from activities such as the harvesting of trees in the surrounding forests We had hoped that the piezo electric actuator system PEPI would increase our duty factor by making it possible to lock the interferometer in a low noise mode during the transitional hours at the beginning and end of the work day when logging and other man made noises were either starting or ending See this document by Joe Giaime LSU and Brian Lantz Stanford for a recent overview of the PEPI system Alas the tree loggers commenced work immediately adjacent to the site Harvesting of trees north of the Laser and Vaccum Equipment Area see map below began just prior to the start of S1 in the shaded areas to the right of the squiggly red line Above map of tree logging activities underway in the vicinity of the corner station during daylight hours of the S1 run The light blue lines indicate the location of the interferometer arms The red arrow shows the direction of the logging activities and the shaded areas indicate the tree harvesting locations The irregular white areas show land not yet logged Unlogged areas are primarily wetlands where trees are left standing to reduce soil erosion We were thrilled when we found out that the logging company would not work on Labor Day weekend And we were dumbfounded when another logging company began work on Labor Day adjacent to the south arm With these activities so close to the site even the set up movements at the start of the day cause ground motions large enough to prevent the operation of the apparatus so there was no transitional time to be had Pictured The view to the east from the roof of the office area at the corner station prior to logging activity left and following its completion right Another act of nature that occurred during this time was the presence of two tropical storms in the northern Gulf of Mexico simultaneously Storms such as this are believed to excite low frequency ground motion through coupling of wave action into the ocean floor and this pressure wave propagates on through deep geologic structures for very long distances The micro seismic feed forward system was designed to handle precisely this kind of problem and we were very glad to have it available to us An example of the very large micro seismic motion encountered during the run is shown in the figure below Shown Several examples of horizontal seismic motion can be seen here

    Original URL path: http://www.ligo.caltech.edu/LIGO_web/0209news/0209s1r2.html (2015-06-03)
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  • An S1 Special Report
    More than 15 scientists in the LSC have contributed to this suite The author of the DMT program environment and author of several programs that run in it is Caltech physicist John Zweizig This environment supports real time graphical displays summary web pages control room alarms database record insertion and writing of summary data files trends Major components of this DMT World were also provided by physicists Daniel Sigg Hanford and Szabi Marka Caltech During S1 a large number of monitors ran continuously in the DMT world to watch for an assortment of potential problems and to record summary information for later use on the states of the three interferometers and their environments For example there were monitors of lock status seismic noise glitchiness in the gravitational wave channel and in auxiliary channels noise levels in various frequency bands narrow and wide noise correlations among channels and expected sensitivity in kilo parsecs to standard astrophysical sources of gravitational waves The DMT world also provides support for interactive exploration of the data exploited by graphics intensive DMT monitors of time frequency behavior in the gravitational wave channel and of non linear noise processes This array of S1 monitors was written primarily by the following LSC scientists Dave Chin Michigan Nelson Christensen Carleton Ed Daw LSU Masahiro Ito Oregon Sergey Klimenko Florida Szabi Marka Caltech Benoit Mours Annecy Adrian Ottewill Dublin Steve Penn Hobart Smith Rauha Rahkola Oregon Kevin Schlaufman Pennsylvania State Daniel Sigg Hanford Patrick Sutton Pennsylvania State Julien Sylvestre MIT Natalia Zotov La Tech and John Zweizig Caltech Most of these scientists had participated in a special E8 Engineering run at Hanford in early June during which the monitors underwent a shakedown one that paid off in S1 with monitoring programs that proved useful from day one Not that there weren t some difficulties We learned how not to do a number of monitoring tasks and we learned the importance of reliably tracking drifts in calibration due mainly to alignment drifts The lessons learned in S1 will prepare us better for the S2 run tentatively scheduled for February 2003 Send In the Scimons Aside from the control room operators the DMT monitors have another audience during data runs the Scimons The Scimons are LSC scientists staffing the scientific monitoring shifts run in parallel with the operator shifts These scientists are focused on ensuring that the interferometer data is of the highest quality They pay close attention to the various DMT monitors outputs both in real time and in retrospect looking at long term trends They also use other software tools in the control room such as the online Data Viewer and the Diagnostic Test Tool to investigate particular problems that arise Since the LSC is a collaboration of scientists with many diverse specialties and backgrounds a formal training system has been instituted for bringing the inexperienced up to speed For most shifts staffed during S1 an expert Scimon was paired with a trainee a pattern that was begun back in

    Original URL path: http://www.ligo.caltech.edu/LIGO_web/0209news/0209s1r3.html (2015-06-03)
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  • Kamionkowski Lecture August 2001
    Head LIGO Hanford Observatory Battelle Auditorium Richland Washington August 12 2001 Video presentation for LAN or high speed connections Audio only presentation Transparencies Scientific American Article Marc s home page You need to have RealPlayer installed on your computer to enjoy this lecture RealPlayer Basic is available free of charge from RealNetworks If you have problems usingRealPlayer please see RealNetworks support site LIGO Laboratory gratefully acknowledges the help of Caltech

    Original URL path: http://www.ligo.caltech.edu/LIGO_web/conferences/kamion_0801.html (2015-06-03)
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  • Technical Safety Technical PM Cost Schedule 4 14 2 Systems Engineering and Integration SYS Technical In PM B Isolation and Suspension 4 02 Seismic Isolation SEI Technical SEI Cost Schedule 4 03 Suspensions SUS Technical SUS Cost Schedule C Optics 4 04 Pre Stabilized Laser PSL Technical PSL Cost Schedule 4 05 Input Optics IO Technical IO Cost Schedule 4 06 Core Optics COC Technical COC Cost Schedule 4 07

    Original URL path: http://www.ligo.caltech.edu/NSF/04.2010.breakouts.htm (2015-06-03)
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  • NSF reviews of LIGO | Caltech | MIT
    Need help Contact us LIGO Operations and Maintenance Annual Reports LIGO Operations Annual Report FY 2009 Charters LIGO Academic Advisory Council Charter LIGO Lab Charter LIGO Oversight Committee Charter Program Advisory Committee Charter Diversity LIGO Laboratory Diversity Plan Draft 2008 Monthly Reports October 2008 November 2008 December 2008 January 2009 February 2009 March 2009 April 2009 May 2009 June 2009 July 2009 August 2009 September 2009 October 2009 NSF Review Report of the NSF Review Panel LIGO AdvLIGO FY 2008 Operations Computer Use Policy Cyber Security Organization Chart Proposed LIGO Operations Performance Metrics LIGO White Paper on an Open Data Policy Outreach and Education Gravitating Toward Science Parent Child Interactions at a Gravitational Wave Observatory LIGO Hanford Observatory Outreach Summary 2008 2009 MSP External Evaluation Report Visits to an Informal Science Education Center Proposals LIGO Continuing Operations Proposal FY2009 FY2013 Safety Emergency Communications Plan Laser Safety Training for Certification and Recertification of LIGO Personnel LIGO Hanford Observatory Emergency Action Plan LLO Emergency Action Plan Science Papers 2009 List only Advanced LIGO Construction Project Project Documents Advanced LIGO Project Acquisition Plan Advanced LIGO Project Execution Plan Advanced LIGO Project reporting site This site uses separate login credentials provided by Tom Carruthers

    Original URL path: http://www.ligo.caltech.edu/NSF/docs.12.2009.shtml (2015-06-03)
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