Stokes inversion based on convolutional neural networks
Context. Spectropolarimetric inversions are routinely used in the field of solar physics for the extraction of physical information from observations. The...
Storms or systematics? The changing secondary eclipse depth of WASP-12b
WASP-12b is one of the most well-studied transiting exoplanets, as its highly inflated radius and its 1.1 d orbit around a G0-type star make it an excellent...
Strategies for flux calibration in massive spectroscopic surveys
Optical large-scale medium-resolution spectroscopic surveys such as SDSS, LAMOST, DESI, WEAVE or 4MOST are subject to constraints that limit the choice of flux...
Strategies for Imaging Faint Extended Sources in the Near-Infrared
Quantitative information about variations in the background at J and K' are presented and used to develop guidelines for the acquisition and reduction of ground...
Strategies for optimal sky subtraction in the low surface brightness regime
The low surface brightness (LSB) regime (μ g ≳ 26 mag arcsec -2) comprises a vast, mostly unexplored discovery space, from dwarf galaxies to the diffuse...
Strong lensing reveals jets in a sub-microJy radio-quiet quasar
We present e-MERLIN and European VLBI Network observations which reveal unambiguous jet activity within radio-quiet quasar HS 0810+2554. With an intrinsic flux...
Structure and dynamics of isolated internetwork Ca II H bright points observed by SUNRISE
Aims: We aim to improve our picture of the low chromosphere in the quiet-Sun internetwork by investigating the intensity, horizontal velocity, size and lifetime...
Structure and star formation in disk galaxies. II. Optical imaging
We present optical observations of a sample of 57 spiral galaxies and describe the procedures followed to reduce the data. We have obtained images in the...
Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44
We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44...