LIGO_casebook

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ZURAB K. SILAGADZE Alleged correlated noise in LIGO data and the Schumann resonance transients Z.K. Silagadze (Submitted on 27 Jul 2017) Recently it was claimed that the LIGO residual noise at the time of the GW150914 gravitational-wave detection event contains some unexplained correlated noise. At that the noise correlations are maximized at the same time-delay as the signal correlations in two LIGO detectors. We argue that the Schumann resonance transients excited by strong lightnings and Q-bursts in Africa will have just this time lag of about 7~ms. Therefore if the correlated noise related to the Schumann resonance transients is indeed present in the LIGO data, its "African part" will show just the proper time-delay and its coincidence with the gravitational-wave time delay is only a coincidence. Comments: Subjects: Cite as: 10 pages, one table Instrumentation and Methods for Astrophysics (astro-ph.IM); General Relativity and Quantum Cosmology (gr-qc) arXiv:1707.09047 [astro-ph.IM] (or arXiv:1707.09047v1 [astro-ph.IM] for this version) 126
Izabela Kowalska-Leszczynska1 et al Globally coherent short duration magnetic field transients and their effect on ground based gravitational-wave detectors Izabela Kowalska-Leszczynska1 , Marie-Anne Bizouard2 , Tomasz Bulik1 , Nelson Christensen3,4 , Michael Coughlin5 , Mark Go lkowski6 , Jerzy Kubisz7 , Andrzej Kulak8 , Janusz Mlynarczyk8 , Florent Robinet2 , Max Rohde3 1Astronomical Observatory Warsaw University, 00-478 Warsaw, Poland 2LAL, Université Paris- Sud, CNRS/IN2P3, Université Paris-Saclay, 91400 Orsay, France 3Physics and Astronomy, Carleton College, Northfield, MN 55057, USA 4Université Côte d’Azur, Observatoire Côte d’Azur, CNRS, ARTEMIS UMR 7250, 06304 Nice, France 5Department of Physics, Harvard University, Cambridge, MA 02138, USA 6Department of Electrical Engineering, University of Colorado Denver, Denver, CO 80204, USA 7Astronomical Observatory, Jagiellonian University, Krakow, Poland 8AGH University of Science and Technology, Department of Electronics, Krakow, Poland Abstract. It has been recognized that the magnetic fields from the Schumann resonances could affect the search for a stochastic gravitational-wave background by LIGO and Virgo. Presented here are the observations of short duration magnetic field transients that are coincident in the magnetometers at the LIGO and Virgo sites. Data from low-noise magnetometers in Poland and Colorado, USA, are also used and show short duration magnetic transients of global extent. We measure at least 2.3 coincident (between Poland and Colorado) magnetic transient events per day where one of the pulses exceeds 200 pT. Given the recently measured values of the magnetic coupling to differential arm motion for Advanced LIGO, there would be a few events per day that would appear simultaneously at the gravitational-wave detector sites and could move the test masses of order 10−18 m. We confirm that in the advanced detector era short duration transient gravitational-wave searches must account for correlated magnetic field noise in the global detector network. 127
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CASEBOOK OF BIBHAS DE The Mystery o
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CONTENT PREFACE 7 INTRODUCTION TO L
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PREFACE As I write this, most every
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INTRODUCTION TO LIGO Laser Interfer
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Inspiral, chirp and ringdown - thes
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quantify the movement l. This quant
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LIGO SCAMORAMA It is not that LIGO
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LIGO CONCLUSIONS Succinct conclusio
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COMMENT ON THE LIGO DISCOVERY OF NE
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”PEER REVIEW” Peer review is a
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COURTROOM DRAMA Now we delve deeper
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LIGO COURTROOM DRAMA: Introduction
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WITTEN: I do not have any backgroun
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CORDOVA: I don’t know what you me
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CORDOVA: It was published in a spec
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LIGO COURTROOM DRAMA: Trial Part 8
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WEISS: Now we are getting into comp
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VERITAS: So, Professor Danzmann, by
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mirrors, along their axes only - wi
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Page 81 and 82: VERITAS: Then I will say. The answe
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Page 87 and 88: COMPARATIVE FRAUDOLOGY The huge sup
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Page 93 and 94: THE LIGO COMMENTARIAT Science repor
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Page 99 and 100: LIGO: Neil deGrasse Tyson’s bizar
Page 101 and 102: PRIZES GALORE No sooner was the LIG
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Page 111 and 112: LIGO CRITICISMS Starting on the sam
Page 113 and 114: CLAES JOHNSON Absurdity of Modern P
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Page 117 and 118: WOLFGANG W. ENGELHARDT Open Letter
Page 119 and 120: Open Letter to The Nobel Committee
Page 121 and 122: Big data analysis of Livingston and
Page 123 and 124: Was LIGO’s Gravitational Wave Det
Page 125: AKHILA RAMAN On the Signal Processi
Page 129 and 130: NOBEL PRIZE AND AFTER To me the new
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Page 151 and 152: NOBEL PRIZE LESSONS The Nobel Prize
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Page 163 and 164: TIME TO TALK ABOUT CRIMINAL FRAUD T
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Page 167 and 168: WHY U.S. SHOULD PROSECUTE LIGO Dece
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