A. P. Lundgren
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View article: CONCERTO: forward modeling of interferograms for calibration
CONCERTO: forward modeling of interferograms for calibration Open
The CarbON [CII] line in post-rEionisation and ReionisaTiOn epoch (CONCERTO) instrument is a low-resolution mapping Fourier-transform spectrometer, based on lumped-element kinetic inductance detector (LEKID) technology, operating at 130- 3…
View article: Possible causes of false general relativity violations in gravitational wave observations
Possible causes of false general relativity violations in gravitational wave observations Open
General relativity (GR) has proven to be a highly successful theory of gravity since its inception. The theory has thrivingly passed numerous experimental tests, predominantly in weak gravity, low relative speeds, and linear regimes, but a…
View article: LearningMatch: Siamese Neural Network Learns the Match Manifold
LearningMatch: Siamese Neural Network Learns the Match Manifold Open
The match, which is defined as the the similarity between two waveform templates, is a fundamental calculation in computationally expensive gravitational-wave data-analysis pipelines, such as template bank generation. In this paper we intr…
View article: GWtuna: Trawling through the data to find Gravitational Waves with Optuna and Jax
GWtuna: Trawling through the data to find Gravitational Waves with Optuna and Jax Open
GWtuna is a fast gravitational-wave search prototype built on Optuna (optimisation software library) and JAX (accelerator-orientated array computation library) [1, 2]. Using Optuna, we introduce black box optimisation algorithms and evolut…
View article: CONCERTO at APEX -- On-sky performance in continuum
CONCERTO at APEX -- On-sky performance in continuum Open
We present the data-processing algorithms and the performance of CONCERTO (CarbON CII line in post-rEionisation and ReionisaTiOn epoch) in continuum by analysing the data from the commissioning and scientific observations. The beam pattern…
View article: How to break the mass sheet degeneracy with the light curves of microlensed Type Ia supernovae
How to break the mass sheet degeneracy with the light curves of microlensed Type Ia supernovae Open
The standardizable nature of gravitationally lensed Type Ia supernovae (glSNe Ia) makes them an attractive target for time-delay cosmography, since a source with known luminosity breaks the mass sheet degeneracy. It is known that microlens…
View article: How to Break the Mass Sheet Degeneracy with the Lightcurves of Microlensed Type Ia Supernovae
How to Break the Mass Sheet Degeneracy with the Lightcurves of Microlensed Type Ia Supernovae Open
The standardizable nature of gravitationally lensed Type Ia supernovae (glSNe Ia) makes them an attractive target for time delay cosmography, since a source with known luminosity breaks the mass sheet degeneracy. It is known that microlens…
View article: Marine recreation with a purpose: an emerging form of marine citizen science in the Ocean Decade
Marine recreation with a purpose: an emerging form of marine citizen science in the Ocean Decade Open
Amidst the growth of the marine technology and recreation sectors and heightened public environmental awareness, the opportunity for marine citizen science is extending to marine recreationalists. An unnoticed yet growing demand for purpos…
View article: Data Release for "Revisiting the evidence for precession in GW200129 with machine learning noise mitigation"
Data Release for "Revisiting the evidence for precession in GW200129 with machine learning noise mitigation" Open
Cleaned gravitational-wave data frame for the Livingston interferometer around GW200129 using NLSub, a machine-learning algorithm. For more details, see the publication on ArXiv: https://arxiv.org/abs/2311.09921. The data frame can be load…
View article: Data Release for "Revisiting the evidence for precession in GW200129 with machine learning noise mitigation"
Data Release for "Revisiting the evidence for precession in GW200129 with machine learning noise mitigation" Open
Cleaned gravitational-wave data frame for the Livingston interferometer around GW200129 using NLSub, a machine-learning algorithm. For more details, see the publication on ArXiv: https://arxiv.org/abs/2311.09921. The data frame can be load…
View article: Revisiting the evidence for precession in GW200129 with machine learning noise mitigation
Revisiting the evidence for precession in GW200129 with machine learning noise mitigation Open
GW200129 is claimed to be the first-ever observation of the spin-disk orbital precession detected with gravitational waves (GWs) from an individual binary system. However, this claim warrants a cautious evaluation because the GW event coin…
View article: Compact binaries through a lens: Silent versus detectable microlensing for the LIGO-Virgo-KAGRA gravitational wave observatories
Compact binaries through a lens: Silent versus detectable microlensing for the LIGO-Virgo-KAGRA gravitational wave observatories Open
Massive objects located between Earth and a compact binary merger can act as gravitational lenses magnifying signals and improving the sensitivity of gravitational wave detectors to distant events. Depending on the parameters of the system…
View article: Sensitive test of non-Gaussianity in gravitational-wave detector data
Sensitive test of non-Gaussianity in gravitational-wave detector data Open
Methods for parameter estimation of gravitational-wave data assume that detector noise is stationary and Gaussian. Real data deviate from these assumptions, which causes bias in the inferred parameters and incorrect estimates of the errors…
View article: Antiglitch: a Quasi-physical Model for Removing Short Glitches from LIGO and Virgo Data
Antiglitch: a Quasi-physical Model for Removing Short Glitches from LIGO and Virgo Data Open
Gravitational-wave observatories become more sensitive with each observing run, increasing the number of detected gravitational-wave signals. A limiting factor in identifying these signals is the presence of transient non-Gaussian noise, w…
View article: ArchEnemy: removing scattered-light glitches from gravitational wave data
ArchEnemy: removing scattered-light glitches from gravitational wave data Open
Data recorded by gravitational wave detectors includes many non-astrophysical transient noise bursts, the most common of which is caused by scattered-light within the detectors. These so-called ‘glitches’ in the data impact the ability to …
View article: A Sensitive Test of Non-Gaussianity in Gravitational-wave Detector Data
A Sensitive Test of Non-Gaussianity in Gravitational-wave Detector Data Open
Methods for parameter estimation of gravitational-wave data assume that detector noise is stationary and Gaussian. Real data deviates from these assumptions, which causes bias in the inferred parameters and incorrect estimates of the error…
View article: Searching for the causes of anomalous Advanced LIGO noise
Searching for the causes of anomalous Advanced LIGO noise Open
Advanced LIGO and Advanced Virgo have detected gravitational waves from astronomical sources to open a new window on the Universe. To explore this new realm requires an exquisite level of detector sensitivity, meaning that the much stronge…
View article: Combining viral genomics and clinical data to assess risk factors for severe COVID-19 (mortality, ICU admission, or intubation) amongst hospital patients in a large acute UK NHS hospital Trust
Combining viral genomics and clinical data to assess risk factors for severe COVID-19 (mortality, ICU admission, or intubation) amongst hospital patients in a large acute UK NHS hospital Trust Open
Throughout the COVID-19 pandemic, valuable datasets have been collected on the effects of the virus SARS-CoV-2. In this study, we combined whole genome sequencing data with clinical data (including clinical outcomes, demographics, comorbid…
View article: ArchEnemy: Removing scattered-light glitches from gravitational wave data
ArchEnemy: Removing scattered-light glitches from gravitational wave data Open
Data recorded by gravitational wave detectors includes many non-astrophysical transient noise bursts, the most common of which is caused by scattered-light within the detectors. These so-called ``glitches'' in the data impact the ability t…
View article: Assessment of the AerosolShield in preventing dental droplet spread
Assessment of the AerosolShield in preventing dental droplet spread Open
BACKGROUND The COVID-19 pandemic has significantly impacted dental healthcare and training. Preventing droplet spread and surface contamination is paramount to keeping patients and practitioners safe. There have been rapid developments in …
View article: Compact Binaries through a Lens: Silent vs. Detectable Microlensing for the LIGO-Virgo-KAGRA Gravitational Wave Observatories
Compact Binaries through a Lens: Silent vs. Detectable Microlensing for the LIGO-Virgo-KAGRA Gravitational Wave Observatories Open
Massive objects located between Earth and a compact binary merger can act as a magnifying glass improving the sensitivity of gravitational wave detectors to distant events. Depending on the parameters of the system, a point mass lens betwe…
View article: LIGO detector characterization in the second and third observing runs
LIGO detector characterization in the second and third observing runs Open
\n The characterization of the Advanced LIGO detectors in the second and third observing runs has increased the sensitivity of the instruments, allowing for a higher number of detectable gravitational-wave signals, and provided confirmatio…
View article: SOAR/Goodman Spectroscopic Assessment of Candidate Counterparts of the LIGO/Virgo Event GW190814
SOAR/Goodman Spectroscopic Assessment of Candidate Counterparts of the LIGO/Virgo Event GW190814 Open
On 2019 August 14 at 21:10:39 UTC, the LIGO/Virgo Collaboration (LVC) detected a possible neutron star-black hole merger (NSBH), the first ever identified. An extensive search for an optical counterpart of this event, designated GW190814, …
View article: SDSS-IV MaStar: theoretical atmospheric parameters for the MaNGA stellar library
SDSS-IV MaStar: theoretical atmospheric parameters for the MaNGA stellar library Open
We calculate the fundamental stellar parameters effective temperature, surface gravity, and iron abundance – Teff, log g, [Fe/H] – for the final release of the Mapping Nearby Galaxies at APO (MaNGA) Stellar Library (MaStar), containing 59 …
View article: SkyPy: A package for modelling the Universe
SkyPy: A package for modelling the Universe Open
SkyPy is an open-source Python package for simulating the astrophysical sky. It comprises a library of physical and empirical models across a range of observables and a command-line script to run end-to-end simulations. The library provide…
View article: SkyPy: A package for modelling the Universe
SkyPy: A package for modelling the Universe Open
SkyPy is an open-source Python package for simulating the astrophysical sky. It comprises a library of physical and empirical models across a range of observables and a command-line script to run end-to-end simulations. The library provide…
View article: Failure of the Fisher matrix when including tidal terms: Considering construction of template banks of tidally deformed binary neutron stars
Failure of the Fisher matrix when including tidal terms: Considering construction of template banks of tidally deformed binary neutron stars Open
Recent gravitational-wave observations have begun to constrain the internal\nphysics of neutron stars. However, current detection searches for neutron star\nsystems assume that potential neutron stars are low-mass black holes, ignoring\nan…
View article: Issues of mismodeling gravitational-wave data for parameter estimation
Issues of mismodeling gravitational-wave data for parameter estimation Open
Bayesian inference is used to extract unknown parameters from gravitational wave signals. Detector noise is typically modelled as stationary, although data from the LIGO and Virgo detectors is not stationary. We demonstrate that the poster…