jyshangguan

JNesty code architecture — modules, data flow, key data structures, JAX patterns, and demo scripts.

Diagnosing convergence problems, poor acceptance rates, and incorrect results in JNesty.

Guide for adding a new bounding method to JNesty.

Guide for adding a new internal sampler (proposal strategy) to JNesty.

JNesty usage guide — public API, parameters, results access, FITS I/O, bounding methods, tuning, and plotting.

Use this skill when the user asks to use GalSpec to fit a spectrum, do spectral fitting with GalSpec, or fit AGN or galaxy emission-line or absorption-line spectra with GalSpec.

This skill should be used when the user asks to "fit ALMA visibility data", "run UV fitting", "fit a Gaussian model to visibilities", "use galfit_uv", "export visibilities from measurement set", "run MCMC on ALMA data", "make clean images from galfit_uv results", or "plot UV data vs model".

This skill should be used when the user asks to "download astronomical images", "get survey images", "download galaxy images", "fetch Legacy Survey images", "PanSTARRS data", "SDSS images", "DSS2 images", mentions "Simbad lookup", "Simbad name resolution", "astro image downloader", or discusses downloading optical/infrared survey data from Legacy Survey, PanSTARRS, SDSS, or DSS2. Also use when user needs images of astronomical objects by name (M87, Ark120, NGC1365, etc.) or coordinates, or wants to download multiple targets from IPAC format tables.