A fast GPU-based bispectrum estimator implemented using JAX.

A nested sampling approach to quasi-stellar object (QSO) accretion disc fitting.

This repository contains a Python module for modelling accretion discs around astrophysical objects. The module provides functions to calculate physical quantities related to accretion disks and perform parameter estimation using observational data. The accretion disc model is the alpha-disc model (see Shakura & Sunyaev 1976), while the parameter estimation can be performed either with Nessai, Raynest or CPnest.
See also Ighina et al. 2024, arXiv 2405.03741.

We present a module built into the PypeIt Python package to reduce high resolution Y, J, H, K, and L band spectra from the W. M. Keck Observatory NIRSPEC spectrograph. This data reduction pipeline is capable of spectral extraction, wavelength calibration, and telluric correction of data taken before and after the 2018 detector upgrade, all in a single package. The procedure for reducing data is thoroughly documented in an expansive tutorial.