We study the impact of sky-based calibration errors from source mismodelling on 21 cm
power spectrum measurements with an interferometer and propose a method for …

The detection of high contrast companions at small angular separation appears feasible in
conventional direct images using the self-calibration properties of interferometric observable …

Bispectrum phase, closure phase and their generalization to kernel phase are all
independent of pupil-plane phase errors to first order. This property, when used with sparse …

ABSTRACT A few percent of all stars are variable, yet over 90% of variables brighter than 12
mag have not been discovered yet. There is a need for an all‐sky search and for the early …

Greisen & Calabretta (2002, A&A, 395, 1061) describe a generalized method for specifying
the coordinates of FITS data samples. Following that general method, Calabretta & Greisen …

Abstract pyspeckit is a toolkit and library for spectroscopic analysis in Python. We describe
the pyspeckit package and highlight some of its capabilities, such as interactively fitting a …

Periods of oscillation are frequently found using one of two methods: least-squares (LSQ) fit
or power spectrum. Their errors are estimated using the LSQ correlation matrix or the …