M. A. Papa

Validating Timing-Model Accuracy for Continuous Gravitational Waves: A Comparison of LALSuite and PINT

Kartikey Sharma, Reinhard Prix, M. A. Papa, Curt Cutler

We present results of a systematic validation of the \lalsuite{} timing model for continuous gravitational waves against \pint{}, a modern high-accuracy pulsar-timing package. An accurate timing model is essential for tracking the signal phase, and hence for detecting and accurately characterizing continuous …

Search for continuous gravitational waves from the pulsar J0435+3233

Brian McGloughlin, Jing Ming, M. A. Papa, K Aparna Sharma et autres

We perform a search for continuous gravitational waves from J0435+3233 using LIGO O4a public data. J0435+3233 is unique among millisecond pulsars as it exhibits an exceptionally large spin-down and marks the first pulsar observed to date with a spin-down larger than $10^{-12}$ …

Search for continuous gravitational waves from the pulsar J0435+3233

Brian McGloughlin, Jing Ming, M. A. Papa, K Aparna Sharma et autres

We perform a search for continuous gravitational waves from J0435+3233 using LIGO O4a public data. J0435+3233 is unique among millisecond pulsars as it exhibits an exceptionally large spin-down and marks the first pulsar observed to date with a spin-down larger than $10^{-12}$ …

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Observational Constraints on the Spin/Anisotropy of the Central Compact Objects of Cassiopeia A, Vela Jr., and G347.3–0.5 and a Single Surviving Continuous Gravitational Wave Candidate

Jing Ming, M. A. Papa, H.-B. Eggenstein, Bernd Machenschalk et autres

Abstract We carry out the deepest and broadest search for continuous gravitational-wave signals from three neutron stars at the center of the supernova remnants Cassiopeia A, Vela Jr., and G347.3-0.5. This search was made possible by the computing power shared by thousands …

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Early release of low-frequency atlas of continuous gravitational waves

Vladimir Dergachev, M. A. Papa

We present the public release of the low-frequency atlas of continuous gravitational waves, covering signals with frequencies from 20 Hz to 200 Hz and frequency derivatives from − 5 × 10 − 11 to 5 × 10 − 11 Hz / s …

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Sco X-1 as a continuous gravitational waves source: modelling the secular evolution using MESA

Gianluca Pagliaro, M. A. Papa, Jing Ming, Devina Misra

ABSTRACT We study the prospects for detecting continuous gravitational waves from Sco X-1, evaluating the most likely waveform and progenitor parameters. We model the spin of the neutron star by the accretion torque and the gravitational-wave torque, considering two mechanisms for generating …

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Einstein@Home Searches for Gamma-Ray Pulsars in the Inner Galaxy

C. J. Clark, Mattia Di Mauro, Jason Wu, B. Allen et autres

Abstract The Fermi Large Area Telescope (LAT) has revealed a mysterious extended excess of GeV gamma-ray emission around the Galactic Center (GC), which can potentially be explained by unresolved emission from a population of pulsars, particularly millisecond pulsars (MSPs), in the Galactic …

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Sco X-1 as a continuous gravitational waves source: modelling the secular evolution using MESA

Gianluca Pagliaro, M. A. Papa, Jing Ming, Devina Misra

We study the prospects for detecting continuous gravitational waves (GWs) from Sco X-1 and evaluate the most likely waveform and progenitor parameters. We model the spin of the neutron star by the accretion torque and the gravitational-wave torque, considering two mechanisms for …

First loosely coherent search for continuous gravitational wave sources with substellar companions in the Orion spur

Vladimir Dergachev, M. A. Papa

We report on the first loosely coherent search for continuous gravitational waves from neutron stars in binary systems. We searched ≈ 0.01 sr in the Orion spur, a high stellar density region close to Earth. We covered gravitational wave frequencies from 100 …

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High-frequency continuous gravitational waves searched in LIGO O3 public data with Einstein@Home

Brian McGloughlin, B. Steltner, M. A. Papa, H.-B. Eggenstein et autres

We search for nearly-monochromatic gravitational wave signals with frequencies $800.0~\textrm{Hz} \leq f \leq 1686.0~\textrm{Hz}$ and spin-down $-2.7\times10^{-9}~\textrm{Hz}\,\textrm{s}^{-1} \leq \dot f \leq 0.2\times 10^{-9}~\textrm{Hz}\,\textrm{s}^{-1}$. We use LIGO O3 public data from the Hanford and Livingston detectors and deploy this search on the Einstein@Home …

Einstein@Home all-sky "bucket" search for continuous gravitational waves in LIGO O3 public data

Brian McGloughlin, B. Steltner, M. A. Papa, H.-B. Eggenstein et autres

We conduct an all-sky search for continuous gravitational waves using LIGO O3 public data from the Hanford and Livingston detectors. We search for nearly-monochromatic signals with frequencies $30\, \text{Hz} \leq f \leq 250\, \text{Hz}$ and spin-down $-2.7 \times 10^{-9}\, \text{Hz/s} \leq \dot{f} …

Expanded atlas of the sky in continuous gravitational waves

Vladimir Dergachev, M. A. Papa

We present the full release of the atlas of continuous gravitational waves, covering frequencies from 20 to 1700 Hz and spin downs from − 5 × 10 − 10 to 5 × 10 − 10 Hz / s . Compared to the …

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