A Near-Infrared μ0,K -- log h Relation for Early-Type Spiral Galaxy Disks
The K-band light-profiles from a sample of roughly 100 disk galaxies have been simultaneously modelled with a seeing convolved Sersic r1/n bulge and an...
A near-infrared/optical/X-ray survey in the centre of σ Orionis
Because of the intense brightness of the OB-type multiple star system σ Ori, the low-mass stellar and substellar populations close to the centre of the very...
A New Approach in Data Reduction: Proper Handling of Random Errors and Image Distortions
Data reduction procedures aim to minimize the impact of data acquisition imperfections on the measurement of data properties with a scientific meaning for the...
AutoFib2, the prime focus, multi-object spectrograph of the WHT, was recently upgraded with the installation of the Small Fibre Module. This allows to reach a...
A new class of type-I X-ray bursters with low persistent luminosities?
Observations with the Wide Field Cameras on BeppoSAX revealed seven type-I X-ray bursters that failed to exhibit significant levels of persistent emission. The...
The criteria for spectral classification of B-type stars were established almost 80 years ago from low-resolution spectra on photographic plates. Since...
A New Code for Automatic Determination of Equivalent Widths: Automatic Routine for Line Equivalent Widths in Stellar Spectra (ARES)
We present a new automatic code (ARES) for the determination of equivalent widths of absorption lines present in stellar spectra. We also describe its use for...