Publications (24)
Self-Structuring of Granular Media under Internal Avalanches
S. Krishnamurthy, V. Loreto, H. J. Herrmann +2
We study the phenomenon of internal avalanching within the context of recently proposed ``Tetris'' lattice models for granular media. We define a recycling dynamics under which the…
Beating the spin-down limit on gravitational wave emission from the Vela pulsar
The LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +747
We present direct upper limits on continuous gravitational wave emission from the Vela pulsar using data from the Virgo detector's second science run. These upper limits have been…
Search for Gravitational Wave Bursts from Six Magnetars
J. Abadie, B. P. Abbott, R. Abbott +765
Soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are thought to be magnetars: neutron stars powered by extreme magnetic fields. These rare objects are characterized b…
Search for gravitational waves from binary black hole inspiral, merger and ringdown
The LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +721
We present the first modeled search for gravitational waves using the complete binary black hole gravitational waveform from inspiral through the merger and ringdown for binaries w…
Spin lifetimes of electrons injected into GaAs and GaN
S. Krishnamurthy, N. Newman, M. van Schilfgaarde
The spin relaxation time of electrons in GaAs and GaN are determined with a model that includes momentum scattering by phonons and ionized impurities, and spin scattering by the El…
Dynamic exponent in Extremal models of Pinning
S. Krishnamurthy, A. Tanguy, S. Roux
The depinning transition of a front moving in a time-independent random potential is studied. The temporal development of the overall roughness w(L,t) of an initially flat front, $…
All-sky Search for Periodic Gravitational Waves in the Full S5 LIGO Data
J. Abadie, B. P. Abbott, R. Abbott +794
We report on an all-sky search for periodic gravitational waves in the frequency band 50-800 Hz and with the frequency time derivative in the range of 0 through -6e-9 Hz/s. Such a…
RRI-GBT Multi-Band Receiver: Motivation, Design & Development
Yogesh Maan, Avinash A. Deshpande, Vinutha Chandrashekar +32
We report the design and development of a self-contained multi-band receiver (MBR) system, intended for use with a single large aperture to facilitate sensitive & high time-resolut…
Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 600-1000 Hz
J. Abadie, B. P. Abbott, R. Abbott +782
A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical…
Implications For The Origin Of GRB 051103 From LIGO Observations
The LIGO Scientific Collaboration, J. Abadie, B. P. Abbott +568
We present the results of a LIGO search for gravitational waves (GWs) associated with GRB 051103, a short-duration hard-spectrum gamma-ray burst (GRB) whose electromagnetically det…
Search for gravitational waves associated with gamma-ray bursts during LIGO science run 6 and Virgo science runs 2 and 3
The LIGO Scientific Collaboration, Virgo Collaboration, J. Abadie +807
We present the results of a search for gravitational waves associated with 154 gamma-ray bursts (GRBs) that were detected by satellite-based gamma-ray experiments in 2009-2010, dur…
Internal avalanches in models of granular media
S. Krishnamurthy, H. J. Herrmann, V. Loreto +2
We study the phenomenon of internal avalanching within the context of recently introduced lattice models of granular media. The avalanche is produced by pulling out a grain at the…
Implementation and testing of the first prompt search for gravitational wave transients with electromagnetic counterparts
The LIGO Scientific Collaboration, Virgo Collaboration, J. Abadie +815
Aims. A transient astrophysical event observed in both gravitational wave (GW) and electromagnetic (EM) channels would yield rich scientific rewards. A first program initiating EM…
Search for Gravitational Waves from Low Mass Compact Binary Coalescence in LIGO's Sixth Science Run and Virgo's Science Runs 2 and 3
the LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +796
We report on a search for gravitational waves from coalescing compact binaries using LIGO and Virgo observations between July 7, 2009 and October 20, 2010. We searched for signals…
Predictions for the Rates of Compact Binary Coalescences Observable by Ground-based Gravitational-wave Detectors
LIGO Scientific Collaboration, Virgo Collaboration, J. Abadie +709
We present an up-to-date, comprehensive summary of the rates for all types of compact binary coalescence sources detectable by the Initial and Advanced versions of the ground-based…
Sensitivity to Gravitational Waves from Compact Binary Coalescences Achieved during LIGO's Fifth and Virgo's First Science Run
The LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +707
We summarize the sensitivity achieved by the LIGO and Virgo gravitational wave detectors for compact binary coalescence (CBC) searches during LIGO's fifth science run and Virgo's f…
Coarsening and Slow-Dynamics in Granular Compaction
A. Baldassarri, S. Krishnamurthy, V. Loreto +1
We address the problem of the microscopic reorganization of a granular medium under a compaction process in the framework of Tetris-like models. We point out the existence of regio…
First search for gravitational waves from the youngest known neutron star
LIGO Scientific Collaboration, J. Abadie, B. P. Abbott +537
We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12-day interval taken fro…
A Stochastic Description for Extremal Dynamics
S. Krishnamurthy, A. Tanguy, P. Abry +1
We show that extremal dynamics is very well modelled by the "Linear Fractional Stable Motion" (LFSM), a stochastic process entirely defined by two exponents that take into account…
Calibration of the LIGO Gravitational Wave Detectors in the Fifth Science Run
LIGO Scientific Collaboration, J. Abadie, B. P. Abbott +538
The Laser Interferometer Gravitational Wave Observatory (LIGO) is a network of three detectors built to detect local perturbations in the space-time metric from astrophysical sourc…
Directional limits on persistent gravitational waves using LIGO S5 science data
J. Abadie, B. P. Abbott, R. Abbott +712
The gravitational-wave (GW) sky may include nearby pointlike sources as well as astrophysical and cosmological stochastic backgrounds. Since the relative strength and angular distr…
All-sky search for gravitational-wave bursts in the second joint LIGO-Virgo run
the LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +786
We present results from a search for gravitational-wave bursts in the data collected by the LIGO and Virgo detectors between July 7, 2009 and October 20, 2010: data are analyzed wh…
Search for Gravitational Waves from Intermediate Mass Binary Black Holes
the LIGO Scientific Collaboration, the Virgo Collaboration, J. Abadie +790
We present the results of a weakly modeled burst search for gravitational waves from mergers of non-spinning intermediate mass black holes (IMBH) in the total mass range 100--450 s…
High contrast optical modulation by surface acoustic waves
S. Krishnamurthy, P. V. Santos
Numerical Calculations are employed to study the modulation of light by surface acoustic waves (SAWs) in photonic band gap (PBG) structures. The on/off contrast ratio in PBG switch…