Twenty codes were added to the ASCL in December, 2025:
ACor: Automated Correlation and processing for radio interferometry
FGOC: Focal-Geometry and Curvature classifier
H21F: Gaussian Process based 21-cm foreground separation code
iSTARMOD: Chromospheric activity in cool stars
Karabo: Validation and benchmarking radio telescopes and algorithms
megaradrp: Data reduction pipeline for MEGARA
numina: Data reduction pipeline interface
PANCAKE: Color–magnitude diagram fitting for stellar populations
PAOS: Physical optics propagation and system modeling
polarpy: POLAR gamma-ray polarimetry data processing
PST: Stellar population synthesis in galaxies
PyLongslit: Astronomical long-slit spectra processor
RVSNUpy: Spectroscopic redshift measurement by cross-correlation
SolarZip: Error-bounded compression of solar EUV images
STARDIS: LTE radiative transfer for synthetic stellar spectra
synax: All sky Synchrotron emission simulation with JAX
tilsotua: WCS reconstruction for LRIS multislit masks
TOAExtractor: Calculate TOAs and residuals of X-ray pulsars
xmm_simulator: XMM mock data simulator
ztfquery: Programmatic access to ZTF data products
Thirty codes were added to the ASCL in November, 2025:
Aperture: High-performance particle-in-cell framework for plasma simulations
BNS_NURATES: Neutrino-Matter interaction rates for binary neutron star mergers
CASSL: Conventional and Sub-Conventional Strong Lensing forecasts and simulations
CompactObject: Bayesian EOS inference for neutron stars
deepCR: Deep-learning based cosmic ray removal for astronomical images
frb_covariance: Fast radio burst covariance
GalClean: Remove bright sources from a FITS image
GAMA Quasar Hosts: Star formation analysis pipeline
HERACLES++: Multidimensional compressible hydrodynamics solver
HyperGal: Supernovae extraction and classification
kdcount: KDTree for low dimensional spatial indexing
lenscov: Full CMB and lensing covariances
Limbdark.jl: Analytical transit light curves for limb darkened stars
MicroLIA: MicroLensing Identification Algorithm
ml4ptp: Machine learning for PT profiles of exoplanet atmospheres
nirwals: Data-reduction and monitoring pipeline for SALT NIRWALS
PIXON: Reverberation mapping analysis in active galactic nuclei
pulses: Periodic spectral modulation analysis
PyCALI: Intercalibrate light curves
pyDIA: Star detection, difference imaging, and photometry
pyhdust: Analysis tools for multi-technique astronomical data and hdust models
redmonster: Automated redshift measurement and spectral classification
SFR_ChebyFit_example: Chebyshev-based correction of SFR estimators
Shamrock: Multi-GPU hydrodynamics framework for astrophysics
skaro: Unveiling planet demographics in the Milky Way
spinosaurus: Lagrangian perturbation theory for galaxy shape and density correlations
Starkiller: Removing stars and satellites from IFU data
STDWeb: Simple Transient Detection for the Web
vis-r: Fast radial profile modeling for radio interferometric data
ViSL3D: Interactive 3D Visualization of Spectral‑Line Datacubes
Twenty-six codes were added to the ASCL in October, 2025:
BoGEMMS-HPC: Large-scale simulations for X-ray and Gamma-ray observations
CMDFitter: Fit a probabilistic generative model to a color-magnitude diagram
CorrCal: Calibration code for semi-redundant arrays
DISCO-DJ: Differentiable Simulations for Cosmology, Done with JAX
FitPDF: Bayesian distribution fitting for pulsar and FRB data
GraFIT: Frequency response function identification in Gravitational Wave detectors
GrayHawk: Gray-body factor calculations for black holes
Lux: Generative latent-variable modeling of astronomical data
MadVoro: Massively distributed construction of Voronoi diagrams
MARFA: Broad-spectrum high-resolution atmospheric absorption analyzer
NP_TMC: Nano-particle Transition Matrix Code
pPXF-SEW: Full-spectrum fitting with penalized pixel-fitting and equivalent width extraction
pyEFPE: Waveform model for inspiralling precessing-eccentric compact binaries
pyproffit: Analyze X-ray brightness profiles from clusters of galaxies
RotCurveTool: Streamlined framework for simulating and fitting galactic rotation curves
RUN Pipeline: Strong lens classification and detection of small Einstein radius systems
SIROCCO: Simulating Ionization and Radiation in Outflows Created by Compact Objects
SNITCH: Bayesian inference of star formation histories
SourceDetect: CNN-based event search for TESS data
spike: All-in-one tool to generate and correctly drizzle HST, JWST, and Roman PSFs
SpyDust: Improved implementation of SPDust for modeling spinning dust radiation
Streaktools: Simulation, measurement, and fitting of satellite-generated streaks
Synthpop: Modular Galactic population synthesis
TABASCAL: Modeling and subtraction of moving radio-frequency interference in interferometric data
TripleLens: Calculating light curves for triple microlensing systems
TRIPP: TRansient Image Processing Pipeline
Twenty-four codes were added to the ASCL in September, 2025:
ArchNEMESIS: Python version of the NEMESIS radiative transfer and retrieval tool
CODES: Benchmarking surrogates for coupled ODE systems
Dazzle: Detecting and characterizing transient phenomena in crowded fields
DeepExtractor: Deep learning time-domain reconstruction for Gravitational Wave power excesses
FindPOTATOs: Candidate detection set tracklet assembler
GRTresna: Solving the initial data constraints in numerical relativity
MANTA-Ray: Optical properties of fractal aggregates estimator
microlux: Binary lensing light curve calculator
moons-sim: 1D Spectral Simulator for VLT-MOONS
nazgul: GRB triangulation via non-stationary time-series models
NutMaat: Stellar spectra classifier based on MKCLASS
PAPI: PANIC Pipeline
PolyCLEAN: Radio interferometric imaging based on Polyatomic Frank-Wolfe
pyCARPool: Convergence Acceleration by Regression and Pooling
PyEMILI: Spectral line identification tool
pyLDT-cosmo: Matter PDF predictions in Large Deviation Theory
PySCo: Cosmological N-body code with modified gravity theories
pySELFI: Python implmentation of the Simulator Expansion for Likelihood-Free Inference algorithm
Simbelmynë: Hierarchical probabilistic simulator for generating synthetic galaxy survey data
SOAP: Spherical Overdensity and Aperture Processor
STELA: Sampling Time for Even Lightcurve Analysis Toolkit
VacuumTunneling: Evaluating bubble profile with a renomalization factor
volcano: Mapping exoplanet surfaces from one-dimensional time-series data
wolensing: Lensed gravitational waves simulator
Twenty-two codes were added to the ASCL in August, 2025:
ABC-SN: Spectroscopic supernova classifier
AGNI: Model for extreme atmospheres on rocky exoplanets
AstroWISP: Astronomical Widefield Images Stellar Photometry
AutoWISP: High-precision photometry pipeline
DeepSSM: Cosmological emulator for the GW spectrum from the modified sound-shell model
EllipSect: Analysis tool for GALFIT output
FiCUS: FItting the stellar Continuum of Uv Spectra
fm4ar: Inferring atmospheric properties of exoplanets using flow matching posterior estimation
FRion: Time averaged correction of Faraday Rotation from the IONosphere
gwsnr: Gravitational Wave Signal-to-Noise Ratio computation
HipFT: High-performance Flux Transport
IAR_Model: Autoregressive model to irregularly spaced data
MPI-Rockstar: Hybrid MPI and OpenMP parallel implementation of Rockstar
OFT: Open-source Flux Transport
pyPLUTO: Tool for analyzing PLUTO code outputs
pySTARBURST99: Python port of STARBURST99
RheoVolution: Rheology evolution in the time domain
SIGWAY: Compute second-order, scalar induced gravitational wave signals
sMV: Serial MultiView phase plane estimation
SoFT: Solar Feature Tracking suite
tropygal: Entropy estimates for galactic dynamics
Twinkle: GPU-based high-efficiency binary-lens microlensing
Thirty codes were added to the ASCL in July, 2025:
arctic_weather: High Arctic meteorological conditions analyzer
Capivara: Scalable spectral-based segmentation package
COBRA: Optimal Factorization of Cosmological Observables
Coniferest: Python package for active anomaly detection
CosmoWAP: Power spectra and bispectra analyzer
DPMhalo: Descriptive Parametric Model for gaseous halos
ExoplanetsSysSim: Exoplanet System Simulation
EXP: nbody EXPansion code
HYDRAD: Field-aligned hydrodynamic equations in coronal loops solver
LSCS: High-contrast space telescopes simulator
MathWAP: Compute power spectra bispectra contributions from peturbation theory
nGIST: The new galaxy integral field spectroscopy tool
Nii-C: Automatic parallel tempering Markov Chain Monte Carlo framework
OW: Opacity Wizard
P-CORONA: Coronal atomic lines intensity and polarizational modeler
PCM-HiPT: Planetary Climate Model for High Pressures and Temperatures
PIRATES: Polarimetric Image Reconstruction AI for Tracing Evolved Structures
Sapphire++: Interaction of charged particles with a background plasma simulator
SAUSERO: Software to AUomatize in a Simple Environment the Reduction of Osiris+
show_cube: Show reduced spectra for Gemini NIFS
spectool: Spectral data processing and analysis toolkit
spherimatch: Cross-matching and self-matching in spherical coordinates
SPIBACK: Backward-integration-based non-axisymmetric models of the Milky Way disk
spinifex: Ionospheric corrections
SysSimExClusters: Clustered planetary system model for SysSim
SysSimPyMMEN: Infer the minimum-mass extrasolar nebula
SysSimPyPlots: Functions for plotting galleries of systems
tayph: Cross-correlation analysis of high resolution spectroscopy
torchmfbd: Multi-object multi-frame blind deconvolution of point-like or extended objects
ysoisochrone: Python package to estimate masses and ages for young stellar objects
Twenty-five codes were added to the ASCL in June, 2025:
3ML: Framework for multi-wavelength/multi-messenger analysis
astromodels: Spatial and spectral models for astrophysics
Bjet_MCMC: Model multiwavelength spectral energy distributions of blazars
CAMEL: Cosmological parameters estimator
CLUES: Clustering tool for analyzing spectral data
CTD: Cumulative Time Dilation
DART-Vetter: Convolutional Neural Network to distinguish planetary transits from false positives
easyCHEM: Chemical abundances in exoplanet atmospheres calculator
excalibuhr: High-resolution spectral data reduction
Gen TSO: Graphical interface to simulate JWST exoplanet time-series observations
GRIP: Generic data Reduction for nulling Interferometry Package
hydromass: Hydrostatic mass profile reconstruction
M_-M_K-: Estimate masses and uncertainties from M_Ks (2MASS Ks + distance)
MAGIC: Automatic analysis of realistic microlensing light curves
OCSVM-Transit-Detection: One-Class SVM exoplanet transit detector
Octofitter: Bayesian inference against exoplanet and binary star data
pinc: Compute profile likelihoods in cosmology
Procoli: 1D profile likelihood extractor
pynchrotron: Synchrotron emission from cooling electrons
pyTPCI: Python version of The Pluto-Cloudy Interface
SBI++: Simulation-based (likelihood-free) inference for astronomical applications
SMART: Forward-modeling framework for spectroscopic data
TESS-cont: TESS contamination tool
TPCI: The PLUTO CLOUDY interface
VBMicrolensing: Microlensing computations for single, binary, and multiple lenses
Twenty codes were added to the ASCL in May, 2025:
Aeolus: Object-oriented analysis of atmospheric model output
afterglowpy: Compute and fit GRB afterglows
AIRI: Algorithms for computational imaging
BEM: Random forest for exoplanets
CETRA: Cambridge Exoplanet Transit Recovery Algorithm
eclipsoid: Transit models for ellipsoidal planets in Jax
Eureka!: Data reduction and analysis pipeline for JWST and HST time-series observations
Exo-MerCat: Exoplanet Merged Catalog with Virtual Observatory connection
ExoLyn: Multi-species cloud modeling in atmospheric retrieval
Hibridon: Time-independent non-reactive quantum scattering calculations
iSLAT: Interactive Spectral-Line Analysis Tool
Jitter: RV jitter prediction code
jnkepler: Differentiable N-body model for multi-planet systems
NumPyro: Probabilistic programming with NumPy
pyGCG: Python Grism Classification GUI
SCATTERING: Solve the coupled equations for a given scattering system
speclib: Tools for working with stellar spectral libraries
SWIFTGalaxy: Galaxy particle analyzer
tBilby: Transdimensional inference for gravitational-wave astronomy with Bilby
TD-CARMA: Estimates of gravitational lens time delays with flexible CARMA processes
Thirty-five codes were added to the ASCL in April, 2025:
AstroPT: Transformer for galaxy images and general astronomy
CHIMERA: CaltecH Inverse ModEling and Retrieval Algorithms
ChromaStarPy: Python stellar atmosphere and spectrum modeling code
DMCalc: In-band dispersion measure of pulsars calculator
DYNAMITE: DYNAmical Multi-planet Injection TEster
ExoInt: Devolatilization and interior modeling package for rocky planets
Flax: Neural network library for JAX
GalClass: Visual Galaxy Classification tool
GNURadio: Software Radio Ecosystem
jaxoplanet: Astronomical time series analysis with JAX
JOFILUREN: Wavelet code for data analysis and de-noising
kotekan: High performance radio data processing pipeline
MultiREx: Massive planetary spectra generator
nuance: Transiting planet detector
PBjam: Automating asteroseismology of solar-like oscillators
PCM_LBL: Planetary Climate Model Line-By-Line
PDQ: Predict Different Quasars
photoevolver: Atmospheric escape of extrasolar planets simulator
picasso: Painting intracluster gas on gravity-only simulations
plaNETic: Small exoplanet internal structure modeling framework
pycdata: Dataset importer for pycheops
Pytmosph3R: Compute transmission spectra of planets with a 1D, 2D, or 3D atmospheric structure
RFIClean: Mitigation of periodic and spiky RFI from filterbank data
RTModel: Microlensing modeling
SHELLFISH: SHELL Finding In Spheroidal Halos
Spright: Bayesian mass-radius relation for small planets
SWAMPE: 2D spectral-core shallow-water exoplanet atmosphere model
TempoNest: Bayesian analysis tool for pulsar timing
tglc: TESS full-frame image light curves
tpfplotter: TESS target pixel file plotter
TriArc: Detecting trace gases in exoplanet atmospheres
TROPF: Tidal Response Of Planetary Fluids
Turbospectrum_NLTE: Turbospectrum 2020 with NLTE capability
Vela.jl: Bayesian pulsar timing and noise analysis
VSPEC: Variable Star PhasE Curve
Forty codes were added to the ASCL in March, 2025:
AESTRA: Radial velocity measurements in the presence of stellar activity noise
APPLESOSS: Empirical profile construction module
ATMOSPHERIX: Processing tool for t.fits files
Bioverse: Quantitative framework for assessing diagnostic power of a statistical exoplanet survey
BT: Blooming Tree hierarchical structure analysis
Colume: Estimating volume densities clouds from their column density morphology
CROCODILE: Atmospheric retrievals of directly observed gas giant exoplanets
Deep-Transit: Transit detection with a 2D object detection algorithm
DIA: Delta function Difference Imaging Code
ExoMDN: Rapid characterization of exoplanet interiors with Mixture Density Networks
exoscene: Simulate direct images of exoplanetary systems
ExoSim 2: Exoplanet Observation Simulator 2
FELINE: Emission lines in galaxies detector
GaMorNet: Galaxy Morphology Network
GaMPEN: Galaxy Morphology Posterior Estimation Network
GEOCLIM.jl: Global silicate weathering estimation
gollum: Programmatic access to precomputed synthetic spectral model grids
GPS: Genesis Population Synthesis
Gradus: Extensible spacetime agnostic general relativistic ray-tracing
HiSS-Cube: Hierarchical Semi-Sparse Cube
IGRINS_transit: Cross-correlation detections of molecules in a transitting exoplanet atmosphere
IsoFATE: Isotopic Fractionation via ATmospheric Escape
kpic_pipeline: KPIC Data Reduction Pipeline
LeR: Gravitational waves lensing rate calculator
LESSPayne: Labeling Echelle Spectra with SMHR and Payne
luas: Gaussian processes for analyzing two-dimensional data sets
mini-chem: Miniature chemical kinetics model for gas giant GCMs
NbodyGradient: Compute gradients of N-body integrations
NcorpiON: N-body integration for collisional and fragmenting systems
NRPyElliptic: Hyperbolic relaxation solver for elliptic equations
OneCovariance: Compute covariance matrices
R2D2: Residual-to-Residual DNN series for high-Dynamic range imaging
ROCKE-3D: Fully coupled ocean atmosphere 3-D General Circulation Model
S3Fit: Simultaneous Spectrum and photometric-SED Fitting code for galaxy observations
SCONE: Supernova Classification with a Convolutional Neural Network
SFA: Superbubble Finding Algorithm
spectools_ir: Medium/high-resolution IR molecular spectra analysis tools
StellarSpecModel: Stellar spectrum and theoretical SEDs tool
TDEF: Synthetic X-ray spectra for fitting Tidal Disruption Events
XGPaint: Fast extragalactic foreground mocks