Outlier Detection in the DESI Bright Galaxy Survey

pmelchior/spender 15 Jul 2023

We present an unsupervised search for outliers in the Bright Galaxy Survey (BGS) dataset from the DESI Early Data Release.

Astrophysics of Galaxies Instrumentation and Methods for Astrophysics

0.02 stars / hour

GetDist: a Python package for analysing Monte Carlo samples

cmbant/getdist 30 Oct 2019

Monte Carlo techniques, including MCMC and other methods, are widely used and generate sets of samples from a parameter space of interest that can be used to infer or plot quantities of interest.

Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics Data Analysis, Statistics and Probability

0.02 stars / hour

The early Universe was dust-rich and extremely hot

marcoviero/simstack3 27 Mar 2022

We investigate the dust properties and star-formation signature of galaxies in the early universe by stacking 111227 objects in the recently released COSMOS catalogue on maps at wavelengths bracketing the peak of warmed dust emission.

Astrophysics of Galaxies

0.01 stars / hour

Statistical properties of flux variations in blazar light curves at GeV and TeV energies

swagner-astro/lightcurves 27 Oct 2021

Using Bayesian blocks and the Eisenstein-Hut HOP algorithm, we characterize flux variations of high significance in the $\gamma$-ray light curves of two samples of blazars.

High Energy Astrophysical Phenomena

0.01 stars / hour

Pre-merger alert to detect the very-high-energy prompt emission from binary neutron-star mergers: Einstein Telescope and Cherenkov Telescope Array synergy

janosch314/gwfish 28 Dec 2022

We discuss the results in terms of possible scenarios of production of VHE photons from binary neutron star mergers by considering GRB prompt and afterglow emissions.

High Energy Astrophysical Phenomena

0.01 stars / hour

ixpeobssim: a Simulation and Analysis Framework for the Imaging X-ray Polarimetry Explorer

lucabaldini/ixpeobssim 12 Mar 2022

The core ixpeobssim simulation capabilities are complemented by a full suite of post-processing applications, allowing for the implementation of complex, polarization-aware analysis pipelines, and facilitating the inter-operation with the standard visualization and analysis tools traditionally in use by the X-ray community.

Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena

0.01 stars / hour

Deep Learning of DESI Mock Spectra to Find Damped Lyα Systems

cosmodesi/desi-dlas 3 Jan 2022

We have optimized the training process and constructed a CNN model that yields a DLA classification accuracy above 99$\%$ for spectra which have signal-to-noise (S/N) above 5 per pixel.

Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics

0.01 stars / hour

Redback: A Bayesian inference software package for electromagnetic transients

nikhil-sarin/redback 24 Aug 2023

We demonstrate through a series of examples how {\sc Redback} can be used as a tool to simulate a large population of transients for realistic surveys, fit models to real, simulated, or private data, multi-messenger inference and serve as an end-to-end software toolkit for parameter estimation and interpreting the nature of electromagnetic transients.

High Energy Astrophysical Phenomena

0.01 stars / hour

Testing Quadratic Maximum Likelihood estimators for forthcoming Stage-IV weak lensing surveys

alexmaraio/weaklensingqml 21 Jul 2022

Headline constraints on cosmological parameters from current weak lensing surveys are derived from two-point statistics that are known to be statistically sub-optimal, even in the case of Gaussian fields.

Cosmology and Nongalactic Astrophysics

0.01 stars / hour

Disks as Inhomogeneous, Anisotropic Gaussian Random Fields

iaart/aart 13 Nov 2020

In the second, by integrating over a movie of a disk, we generate synthetic light curves and show that the high frequency slope of the resulting power spectrum depends on the local covariance model.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena

0.01 stars / hour