Redback: A Bayesian inference software package for electromagnetic transients

Abstract

Fulfilling the rich promise of rapid advances in time-domain astronomy is only possible through confronting our observations with physical models and extracting the parameters that best describe what we see. Here, we introduce {\sc Redback}; a Bayesian inference software package for electromagnetic transients. {\sc Redback} provides an object-orientated {\sc python} interface to over 12 different samplers and over 100 different models for kilonovae, supernovae, gamma-ray burst afterglows, tidal disruption events, engine-driven transients among other explosive transients. The models range in complexity from simple analytical and semi-analytical models to surrogates built upon numerical simulations accelerated via machine learning. {\sc Redback} also provides a simple interface for downloading and processing data from various catalogs such as \textit{Swift} and Fink. The software can also serve as an engine to simulate transients for telescopes such as the Zwicky Transient Facility and Vera Rubin with realistic cadences, limiting magnitudes, and sky-coverage or a hypothetical user-constructed survey or a generic transient for target-of-opportunity observations with different telescopes. As a demonstration of its capabilities, we show how {\sc Redback} can be used to jointly fit the spectrum and photometry of a kilonova, enabling a more powerful, holistic probe into the properties of a transient. We also showcase general examples of how {\sc Redback} can be used as a tool to simulate transients for realistic surveys, fit models to real, simulated, or private data, multi-messenger inference with gravitational waves, and serve as an end-to-end software toolkit for parameter estimation and interpreting the nature of electromagnetic transients.

Published in MNRAS. 25 pages 11 figures. Redback is available on GitHub at https://github.com/nikhil-sarin/redback

References in corpus (107)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Multi-messenger Observations of a Binary Neutron Star Merger
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Spectra and Light Curves of Gamma-Ray Burst Afterglows
• dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• Discovery of the peculiar supernova 1998bw in the error box of GRB980425
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Electromagnetic Counterparts of Compact Object Mergers Powered by the Radioactive Decay of R-process Nuclei
• Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
• Bilby: A user-friendly Bayesian inference library for gravitational-wave astronomy
• Jets in GRBs
• The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• A kilonova as the electromagnetic counterpart to a gravitational-wave source
• A "kilonova" associated with short-duration gamma-ray burst 130603B
• Gamma-ray Burst Afterglow with Continuous Energy Injection: Signature of a Highly-Magnetized Millisecond Pulsar
• Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
• Superluminal motion of a relativistic jet in the neutron star merger GW170817
• On the astrophysical robustness of neutron star merger r-process
• The Combined Ultraviolet, Optical, and Near-Infrared Light Curves of the Kilonova Associated with the Binary Neutron Star Merger GW170817: Unified Data Set, Analytic Models, and Physical Implications
• GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
• A Radio Counterpart to a Neutron Star Merger
• Hydrodynamical Simulations to Determine the Feeding Rate of Black Holes by the Tidal Disruption of Stars: The Importance of the Impact Parameter and Stellar Structure
• Bayesian inference for compact binary coalescences with BILBY: Validation and application to the first LIGO--Virgo gravitational-wave transient catalogue
• Signatures of magnetar central engines in short GRB lightcurves
• Kilonovae
• An Open Catalog for Supernova Data
• Radio Remnants of Compact Binary Mergers - the Electromagnetic Signal that will follow the Gravitational Waves
• Rapidly-Evolving and Luminous Transients from Pan-STARRS1
• SNANA: A Public Software Package for Supernova Analysis
• The Fourth Fermi-GBM Gamma-Ray Burst Catalog: A Decade of Data
• A very luminous magnetar-powered supernova associated with an ultra-long gamma-ray burst
• The Observer's Guide to the Gamma-Ray Burst-Supernova Connection
• Optical and X-ray emission from stable millisecond magnetars formed from the merger of binary neutron stars
• The magnetar model for Type I superluminous supernovae I: Bayesian analysis of the full multicolour light curve sample with MOSFiT
• Multi-messenger Bayesian parameter inference of a binary neutron-star merger
• Analytical Light Curve Models of Super-Luminous Supernovae: chi^2-Minimizations of Parameter Fits
• Bright "merger-nova" from the remnant of a neutron star binary merger: A signature of a newly born, massive, millisecond magnetar
• Gamma-Ray Burst Afterglows In The Multi-Messenger Era: Numerical Models and Closure Relations
• Weighing Black Holes using Tidal Disruption Events
• MOSFiT: Modular Open-Source Fitter for Transients
• Data analysis recipes: Fitting a model to data
• A Decline in the X-ray through Radio Emission from GW170817 Continues to Support an Off-Axis Structured Jet
• The cocoon emission - an electromagnetic counterpart to gravitational waves from neutron star mergers
• POSSIS: predicting spectra, light curves and polarization for multi-dimensional models of supernovae and kilonovae
• The Swift Burst Analyser I: BAT and XRT spectral and flux evolution of Gamma Ray Bursts
• A Systematic Analysis of Supernova Light in Gamma-Ray Burst Afterglows
• GRB Afterglows with Energy Injection from a spinning down NS
• Short GRB 160821B: a reverse shock, a refreshed shock, and a well-sampled kilonova
• The optical afterglow of GW170817 at one year post-merger
• Rapidly Rising Transients in the Supernova - Superluminous Supernova Gap
• Evidence for Cocoon Emission from the Early Light Curve of SSS17a
• PS18kh: A New Tidal Disruption Event with a Non-Axisymmetric Accretion Disk
• Fink, a new generation of broker for the LSST community
• Axisymmetric Radiative Transfer Models of Kilonovae
• The Optical Afterglow of GW170817: An Off-axis Structured Jet and Deep Constraints on a Globular Cluster Origin
• Superluminous Supernovae Powered by Magnetars: Late-time Light Curves and Hard Emission Leakage
• Radioactive heating rate of r-process elements and macronova light curve
• Modelling the spectra of the kilonova AT2017gfo -- I: The photospheric epochs
• Tight multi-messenger constraints on the neutron star equation of state from GW170817 and a forward model for kilonova light curve synthesis
• The Multi-Mission Maximum Likelihood framework (3ML)
• Theoretical Models of Optical Transients. I. A Broad Exploration of the Duration-Luminosity Phase Space
• Evidence for an intermediate-mass black hole from a gravitationally lensed gamma-ray burst
• The braking index of millisecond magnetars
• Simulations of early kilonova emission from neutron star mergers
• Cooling Envelope Model for Tidal Disruption Events
• Can jets make the radioactively powered emission from neutron star mergers bluer?
• Gravitational waves or deconfined quarks: what causes the premature collapse of neutron stars born in short gamma-ray bursts?
• Observable Features of GW170817 Kilonova Afterglow
• Kilohertz quasiperiodic oscillations in short gamma-ray bursts
• Dynamical ejecta synchrotron emission as possible contributor to the changing behaviour of GRB170817A
• Thermal Electrons in Mildly-relativistic Synchrotron Blast-waves
• GRB jet structure and the jet break
• Optical to X-ray Signatures of Dense Circumstellar Interaction in Core-Collapse Supernovae
• A unified binary neutron star merger magnetar model for the Chandra X-ray transients CDF-S XT1 and XT2
• Relative Binning and Fast Likelihood Evaluation for Gravitational Wave Parameter Estimation
• Signatures of R-process Enrichment in Supernovae from Collapsars
• Tidal disruptions of main sequence stars -- IV. Relativistic effects and dependence on black hole mass
• The Effect of Jet-Ejecta Interaction on the Viewing Angle Dependence of Kilonova Light Curves
• Analytic Light Curves of Dense CSM Shock Breakout and Cooling
• GRB 170817A as a Refreshed Shock Afterglow viewed off-axis
• Interpreting the X-ray afterglows of gamma-ray bursts with radiative losses and millisecond magnetars
• A Generalized Semi-Analytic Model for Magnetar-Driven Supernovae
• The First Day in the Life of a Magnetar: Evolution of the Inclination Angle, Magnetic Dipole Moment and Braking Index of Millisecond Magnetars During Gamma-Ray Burst Afterglows
• Searching for quasi-periodic oscillations in astrophysical transients using Gaussian processes
• Extended Self-similar Solution for Circumstellar Material-Supernova Ejecta Interaction
• The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties
• Tidal Disruption Events through the Lens of the Cooling Envelope Model
• KilonovaNet: Surrogate Models of Kilonova Spectra with Conditional Variational Autoencoders
• Hubble constant and nuclear equation of state from kilonova spectro-photometric light curves
• Multimessenger astronomy with a kHz-band gravitational-wave observatory
• The Landscape of Thermal Transients from Supernova Interacting with a Circumstellar Medium
• Magnetar Flare-Driven Bumpy Declining Light Curves in Hydrogen-poor Superluminous Supernovae
• Joint analysis of gravitational-wave and electromagnetic data of mergers: breaking an afterglow model degeneracy in GW170817 and in future events
• From existing and new nuclear and astrophysical constraints to stringent limits on the equation of state of neutron-rich dense matter
• Prospects of Gravitational Wave Follow-up Through a Wide-field Ultra-violet Satellite: a Dorado Case Study
• 1100 days in the life of the supernova 2018ibb -- The best pair-instability supernova candidate, to date
• The Multiwavelength Picture of GRB 221009A's Afterglow
• CDF-S XT1: The off-axis afterglow of a neutron star merger at $z=2.23$
• Modelling of Long-Term Afterglow Counterparts to Gravitational Wave Events: The Full View of GRB 170817A
• Shocks Power Tidal Disruption Events

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• Cautionary tales on heating-rate prescriptions in kilonovae
• Multi-Peaked Non-Thermal Light Curves from Magnetar-Powered Gamma-Ray Bursts
• Probing Interacting Dark Sector with the next generation of gravitational-wave detectors
• Eruptive mass loss less than a year before the explosion of superluminous supernovae: I. The cases of SN 2020xga and SN 2022xgc
• The origin of the coherent radio flash potentially associated with GRB 201006A
• Surrogate models for lightcurves and photosphere properties of Type II supernovae
• Data-driven approach for modeling the temporal and spectral evolution of kilonova systematic uncertainties
• Unveiling the nature of the Einstein Probe transient EP 241021a
• MUSE IFU observations of galaxies hosting Tidal Disruption Events
• Candidate strongly lensed type Ia supernovae in the Zwicky Transient Facility archive
• The Case for Space: Estimating Precise Time Delays from Ground- and Space-Based Observations of Lensed Supernovae with Glimpse
• EP241217a: a likely Type II GRB with an achromatic bump at z = 4.59
• An Archival Optical Counterpart Search for Extragalactic Fast X-Ray Transients Discovered by Einstein Probe
• The New Status Qvo? SN 2021qvo is Another 2003fg-like Type Ia Supernova with a Rising Light-Curve Bump
• Search for the Optical Counterpart of Einstein Probe Discovered Fast X-ray Transients from Lulin Observatory
• Kilonova and progenitor properties of merger-driven gamma-ray bursts
• GOTO identification and broadband modelling of the counterpart to the SVOM GRB 250818B