T. Erben
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View article: Euclid Quick Data Release (Q1): VIS processing and data products
Euclid Quick Data Release (Q1): VIS processing and data products Open
This paper describes the VIS Processing Function (VIS PF) of the Euclid ground segment pipeline, which processes and calibrates raw data from the VIS camera. We present the algorithms used in each processing element, along with a descripti…
View article: The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package*
The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package* Open
\n The Astropy Project supports and fosters the development of open-source and openly developed Python packages that provide commonly needed functionality to the astronomical community. A key element of the Astropy Project is the core pack…
View article: XMM-SERVS X-ray extended Galaxy Cluster (XVXGC) catalog
XMM-SERVS X-ray extended Galaxy Cluster (XVXGC) catalog Open
Context . To explain the well-known tension between cosmological parameter constraints obtained from the primary cosmic microwave background (CMB) and those drawn from X-ray-selected galaxy cluster samples identified with early data, we pr…
View article: The XMM-SERVS X-ray eXtended Galaxy Cluster (XVXGC) catalog
The XMM-SERVS X-ray eXtended Galaxy Cluster (XVXGC) catalog Open
To explain the well-known tension between cosmological parameter constraints obtained from the primary CMB and those drawn from galaxy cluster samples, we propose a possible explanation for the incompleteness of detected clusters are highe…
View article: The abundance of ultra-diffuse galaxies from groups to clusters UDGs are relatively more common in more massive haloes
The abundance of ultra-diffuse galaxies from groups to clusters UDGs are relatively more common in more massive haloes Open
In recent years, many studies have reported substantial populations of large galaxies with low surface brightness in local galaxy clusters. Various theories that aim to explain the presence of such ultra-diffuse galaxies (UDGs) have since …
View article: Photometric redshifts for the Kilo-Degree Survey: Machine-learning analysis with artificial neural networks
Photometric redshifts for the Kilo-Degree Survey: Machine-learning analysis with artificial neural networks Open
We present a machine-learning photometric redshift (ML photo-z) analysis of the Kilo-Degree Survey Data Release 3 (KiDS DR3), using two neural-network based techniques: ANNz2 and MLPQNA. Despite limited coverage of spectroscopic training s…
View article: The eROSITA view of the Abell 3391/95 field
The eROSITA view of the Abell 3391/95 field Open
Context . About 30% – 40% of the baryons in the local Universe remain unobserved. Many of these "missing" baryons are expected to reside in the warm-hot intergalactic medium (WHIM) of the cosmic web filaments that connect clusters of galax…
View article: The eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments
The eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments Open
Aims. We aim to characterize the gas properties in the cluster outskirts ($R_{500}R_{200}$) of the A3391/95 system and to compare them to predictions. Methods. We performed X-ray image and spectral analyses using the eROSITA PV data to ass…
View article: Constraints on galaxy formation from the cosmic-far-infrared-background – optical-imaging cross-correlation using <i>Herschel</i> and UNIONS
Constraints on galaxy formation from the cosmic-far-infrared-background – optical-imaging cross-correlation using <i>Herschel</i> and UNIONS Open
Using Herschel-SPIRE imaging and the Canada-France Imaging Survey (CFIS) Low Surface Brightness data products from the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS), we present a cross-correlation between the cosmic far-infrar…
View article: The shape of dark matter haloes: results from weak lensing in the ultraviolet near-infrared optical Northern survey (UNIONS)
The shape of dark matter haloes: results from weak lensing in the ultraviolet near-infrared optical Northern survey (UNIONS) Open
Cold dark matter haloes are expected to be triaxial and so appear elliptical in projection. We use weak gravitational lensing from the Canada–France Imaging Survey (CFIS) component of the Ultraviolet Near-Infrared Optical Northern Survey (…
View article: Clustering of red sequence galaxies in the fourth data release of the Kilo-Degree Survey
Clustering of red sequence galaxies in the fourth data release of the Kilo-Degree Survey Open
We present a sample of luminous red sequence galaxies as the basis for a study of the large-scale structure in the fourth data release of the Kilo-Degree Survey. The selected galaxies are defined by a red sequence template, in the form of …
View article: The shape of dark matter haloes: results from weak lensing in the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS)
The shape of dark matter haloes: results from weak lensing in the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) Open
Cold dark matter haloes are expected to be triaxial, and so appear elliptical in projection. We use weak gravitational lensing from the Canada-France Imaging Survey (CFIS) component of the Ultraviolet-Near Infrared Optical Northern Survey …
View article: Extending empirical constraints on the SZ-mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at $z\gtrsim1$
Extending empirical constraints on the SZ-mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at $z\gtrsim1$ Open
We present a Hubble Space Telescope (HST) weak gravitational lensing study of nine distant and massive galaxy clusters with redshifts $1.0 \lesssim z \lesssim 1.7$ ($z_\mathrm{median} = 1.4$) and Sunyaev Zel'dovich (SZ) detection significa…
View article: Extending empirical constraints on the SZ–mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at <i>z</i> ≳ 1
Extending empirical constraints on the SZ–mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at <i>z</i> ≳ 1 Open
We present a Hubble Space Telescope (HST) weak gravitational lensing study of nine distant and massive galaxy clusters with redshifts 1.0 ≲ z ≲ 1.7 ( z median = 1.4) and Sunyaev Zel’dovich (SZ) detection significance ξ > 6.0 from the South…
View article: ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data
ShapePipe: A new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data Open
Context. The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is an ongoing collaboration that will provide the largest deep photometric survey of the northern sky in four optical bands to date. As part of this collaboration, the…
View article: ShapePipe: a new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data
ShapePipe: a new shape measurement pipeline and weak-lensing application to UNIONS/CFIS data Open
UNIONS is an ongoing collaboration that will provide the largest deep photometric survey of the Northern sky in four optical bands to date. As part of this collaboration, CFIS is taking $r$-band data with an average seeing of 0.65 arcsec, …
View article: Constraints on galaxy formation from the cosmic-far-infrared-background\,$-$\,optical-imaging cross-correlation using \textit{Herschel} and UNIONS
Constraints on galaxy formation from the cosmic-far-infrared-background\,$-$\,optical-imaging cross-correlation using \textit{Herschel} and UNIONS Open
Using {\it Herschel}-SPIRE imaging and the Canada-France Imaging Survey (CFIS) Low Surface Brightness data products from the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS), we present a cross-correlation between the cosmic far-…
View article: Constraints on galaxy formation from the cosmic-far-infrared-background\,$-$\,optical-imaging cross-correlation using \textit{Herschel} and UNIONS
Constraints on galaxy formation from the cosmic-far-infrared-background\,$-$\,optical-imaging cross-correlation using \textit{Herschel} and UNIONS Open
Using {\it Herschel}-SPIRE imaging and the Canada-France Imaging Survey (CFIS) Low Surface Brightness data products from the Ultraviolet Near-Infrared Optical Northern Survey (UNIONS), we present a cross-correlation between the cosmic far-…
View article: A New X-Ray Tidal Disruption Event Candidate with Fast Variability
A New X-Ray Tidal Disruption Event Candidate with Fast Variability Open
During a close encounter between a star and a supermassive black hole, the star can get disrupted by the black hole’s tidal forces, resulting in a tidal disruption event (TDE). The accretion of the star’s material onto the black hole produ…
View article: Catalog of X-ray-selected extended galaxy clusters from the ROSAT All-Sky Survey (RXGCC)
Catalog of X-ray-selected extended galaxy clusters from the ROSAT All-Sky Survey (RXGCC) Open
Context. There is a known tension between cosmological parameter constraints obtained from the primary cosmic microwave background and those drawn from galaxy cluster samples. One possible explanation for this discrepancy may be that the i…
View article: An X-ray selected catalog of extended galaxy clusters from the ROSAT All-Sky Survey (RXGCC)
An X-ray selected catalog of extended galaxy clusters from the ROSAT All-Sky Survey (RXGCC) Open
There is a known tension between cosmological parameter constraints obtained from the primary CMB and those from galaxy cluster samples. One possible explanation could be certain types of groups or clusters of galaxy have been missed in th…
View article: The eROSITA view of the Abell 3391/95 field: The Northern Clump
The eROSITA view of the Abell 3391/95 field: The Northern Clump Open
Context. Galaxy clusters grow through mergers and the accretion of substructures along large-scale filaments. Many of the missing baryons in the local Universe may reside in such filaments as the warm-hot intergalactic medium (WHIM). Aims.…
View article: Photometric selection and redshifts for quasars in the Kilo-Degree Survey Data Release 4
Photometric selection and redshifts for quasars in the Kilo-Degree Survey Data Release 4 Open
We present a catalog of quasars with their corresponding redshifts derived from the photometric Kilo-Degree Survey (KiDS) Data Release 4. We achieved it by training machine learning (ML) models, using optical u g ri and near-infrared Z Y J…
View article: Halo shapes constrained from a pure sample of central galaxies in KiDS-1000
Halo shapes constrained from a pure sample of central galaxies in KiDS-1000 Open
We present measurements of f h , the ratio of the aligned components of the projected halo and galaxy ellipticities, for a sample of central galaxies using weak gravitational lensing data from the Kilo-Degree Survey (KiDS). Using a lens ga…
View article: KiDS-1000 catalogue: Redshift distributions and their calibration
KiDS-1000 catalogue: Redshift distributions and their calibration Open
We present redshift distribution estimates of galaxies selected from the fourth data release of the Kilo-Degree Survey over an area of ∼1000 deg 2 (KiDS-1000). These redshift distributions represent one of the crucial ingredients for weak …
View article: CODEX weak lensing mass catalogue and implications on the mass–richness relation
CODEX weak lensing mass catalogue and implications on the mass–richness relation Open
The COnstrain Dark Energy with X-ray clusters (CODEX) sample contains the largest flux limited sample of X-ray clusters at 0.35 < z < 0.65. It was selected from ROSAT data in the 10 000 square degrees of overlap with BOSS, mapping a …
View article: The Abell 3391/95 galaxy cluster system
The Abell 3391/95 galaxy cluster system Open
Context. Inferences about dark matter, dark energy, and the missing baryons all depend on the accuracy of our model of large-scale structure evolution. In particular, with cosmological simulations in our model of the Universe, we trace the…
View article: Discovery of Two Einstein Crosses from Massive Post-blue Nugget Galaxies at z > 1 in KiDS*
Discovery of Two Einstein Crosses from Massive Post-blue Nugget Galaxies at z > 1 in KiDS* Open
We report the discovery of two Einstein Crosses (ECs) in the footprint of the Kilo-Degree Survey (KiDS): KIDS J232940-340922 and KIDS J122456+005048. Using integral field spectroscopy from the Multi Unit Spectroscopic Explorer at the Very …