Astrophysics Source Code Library (ASCL) The ASCL is a free online registry and repository for source codes important to astronomers and astrophysicists, including solar system researchers. It catalogs codes used in peer-reviewed research and is indexed by major services such as the SAO/NASA Astrophysics Data System (ADS) and Web of Science. Each code is assigned a unique citable ASCL ID, facilitating easy linking and citation. --- Recently Added Codes September 1, 2025 adstex ([submitted]) Author: Yao-Yuan Mao Automates bibliography creation by parsing citation keys in LaTeX files and fetching reference info from NASA ADS. Recognizes various citation formats including arXiv, DOI, and ADS bibcodes. It can detect updates and keep bibliography files current, allowing effortless bibliography management for astronomy papers. August 31, 2025 IARModel ([ascl:2508.022]) Authors: Susana Eyheramendy, Felipe Elorrieta, Wilfredo Palma Fits irregularly spaced time series using Irregular Autoregressive models. Available in Python and R, supports likelihood computations, data generation, model fitting, and statistical significance testing. fm4ar ([ascl:2508.021]) Authors: Timothy D. Gebhard, Jonas Wildberger, Maximilian Dax Infers atmospheric properties of exoplanets from spectra using flow matching posterior estimation (machine learning method). Offers advantages over neural posterior estimation with added flexibility and scalability, and includes importance sampling for verification and Bayesian evidence estimation. Adaptable to noise level assumptions in spectra. AGNI ([ascl:2508.020]) Authors: Harrison Nicholls, Raymond Pierrehumbert, Tim Lichtenberg Models atmospheres of rocky exoplanets with magma oceans, ensuring radiative-convective equilibrium. Supports real gas equations of state, self-gravitation, and various surface spectra for realistic atmospheric structure and cooling rate calculations. FiCUS ([ascl:2508.019]) Authors: A. Saldana-Lopez et al. Fits the stellar continuum in extragalactic UV spectra to estimate stellar age, metallicity, dust extinction, and other SED parameters. Operates with observed wavelength, flux densities, and masks. Includes scripts for fitting and spectral analysis with comprehensive output generation. pyStarburst99 ([ascl:2508.018]) Authors: Calum Hawcroft et al. Python port of Starburst99, a population synthesis code for star-forming galaxies. Adds new stellar evolutionary tracks and spectral energy distributions, extending coverage in metallicity, mass, and resolution, modeling stars up to 300-500 solar masses. SIGWAY ([ascl:2508.017]) Authors: Jonas El Gammal et al., LISA Cosmology Working Group Pipeline for computing second-order scalar induced gravitational wave signals from early universe curvature perturbations. Solves Mukhanov-Sasaki equations for ultra-slow-roll inflation and computes scalar power spectrum and induced gravitational wave spectra for radiation or early matter domination epochs. sMV ([ascl:2508.016]) Authors: Jingdong Zhang et al. Semi-automatic scripts for Serial MultiView phase plane estimation to improve differential astrometry and imaging. Iteratively rotates phase planes using calibrator residual phase time series to automatically resolve phase ambiguities for high-accuracy results. August 30, 2025 DeepSSM ([ascl:2508.015]) Authors: Chi Tian, Xiao Wang, Csaba Balázs A cosmological emulator built on Flax that predicts gravitational wave spectra from sound waves during first-order phase transitions in the early universe. Uses neural networks trained on an enhanced Sound Shell Model and provides rapid, accurate predictions suitable for Bayesian inference without relying on empirical templates. HipFT ([ascl:2508.014]) Authors: Ronald M. Caplan et al.* High-performance solar surface flux