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CFHTLenS: Improving the quality of photometric redshifts with precision photometry
H. Hildebrandt, T. Erben, K. Kuijken +16
Here we present the results of various approaches to measure accurate colours and photometric redshifts (photo-z's) from wide-field imaging data. We use data from the Canada-France…
The Cosmic Web and galaxy evolution around the most luminous X-ray cluster: RXJ1347.5-1145
M. Verdugo, M. Lerchster, H. Boehringer +5
In this paper we study the large scale structures and their galaxy content around the most X-ray luminous cluster known, RX J1347.5-1145 at z=0.45. We make use of ugriz CFHT MEGACA…
The impact of high spatial frequency atmospheric distortions on weak lensing measurements
Catherine Heymans, Barnaby Rowe, Henk Hoekstra +4
High precision cosmology with weak gravitational lensing requires a precise measure of the Point Spread Function across the imaging data where the accuracy to which high spatial fr…
The 400d Galaxy Cluster Survey weak lensing programme: II: Weak lensing study of seven clusters with MMT/Megacam
Holger Israel, Thomas Erben, Thomas H. Reiprich +3
Evolution in the mass function of galaxy clusters sensitively traces both the expansion history of the Universe and cosmological structure formation. Robust cluster mass determinat…
Lensing Magnification: A novel method to weigh high-redshift clusters and its application to SpARCS
Hendrik Hildebrandt, Adam Muzzin, Thomas Erben +6
We introduce a novel method to measure the masses of galaxy clusters at high redshift selected from optical and IR Spitzer data via the red-sequence technique. Lyman-break galaxies…
Mass, Light and Colour of the Cosmic Web in the Supercluster SCL2243-0935 (z=0.447)
Mischa Schirmer, Hendrik Hildebrandt, Konrad Kuijken +1
Context: In 2.2m MPG-ESO/WFI data we discovered several mass peaks through weak lensing, forming a possible supercluster at redshift 0.45. Through multi-colour wide-field imaging w…