Finding galaxy clusters using Voronoi tessellations
We present an objective and automated procedure for detecting clusters of galaxies in imaging galaxy surveys. Our Voronoi Galaxy Cluster Finder (VGCF) uses...
Fingerprints of stellar populations in the near-infrared: an optimized set of spectral indices in the JHK bands 0
Stellar population studies provide unique clues to constrain galaxy formation models. So far, detailed studies based on absorption line strengths have mainly...
FIR colours and SEDs of nearby galaxies observed with Herschel
We present infrared colours (in the 25-500 μm spectral range) and UV to radio continuum spectral energy distributions of a sample of 51 nearby galaxies observed...
FIR Measurements of Lyα Emitters at z <~ 1.0: Dust Attenuation from PACS-Herschel
One remaining open question regarding the physical properties of Lyα emitters (LAEs) is their dust content and evolution with redshift. The variety of results...
First broadband characterization and redshift determination of the VHE blazar MAGIC J2001+439
Aims: We aim to characterize the broadband emission from 2FGL J2001.1+4352, which has been associated with the unknown-redshift blazar MG4 J200112+4352. Based...
First characterization of the emission behavior of Mrk 421 from radio to very high-energy gamma rays with simultaneous X-ray polarization measurements
Aims: We have performed the first broadband study of Mrk 421 from radio to TeV gamma rays with simultaneous measurements of the X-ray polarization from IXPE...
First Chemical Analysis of Stars in the Triangulum--Andromeda Star Cloud
We undertake the first high-resolution spectroscopic study of the Triangulum-Andromeda (TriAnd) star cloud—an extended, mid-latitude Milky Way (MW) halo...
First detection of the outer edge of an AGN accretion disc: very fast multiband optical variability of NGC 4395 with GTC/HiPERCAM and LT/IO:O
We present fast (~200 s sampling) $\it ugriz$ photometry of the low -mass AGN NGC 4395 with the Liverpool Telescope, followed by very fast (3 s sampling) u s, g...
First detection of VHE gamma-ray emission from TXS 1515-273, study of its X-ray variability and spectral energy distribution
We report here on the first multiwavelength (MWL) campaign on the blazar TXS 1515-273, undertaken in 2019 and extending from radio to very-high-energy gamma...