Postdoc position in galaxy formation at IAP, Paris !

By | December 15, 2021

We are inviting applicants for a postdoctoral position at the Institut d’Astrophysique de Paris to work with Clotilde Laigle and H.J.McCracken in close collaboration with Laure Ciesla and Olivier Ilbert (Laboratoire d’Astrophysique de Marseille). The contract is supported by the IPI. Here is the AAS job register posting. More information Background: In the next decade,… Read More »

Introducing COSMOS2020

By | October 28, 2021

Today we publicly release COSMOS2020, a catalogue of almost a million sources with photometric redshifts and stellar masses in the COSMOS field. COSMOS2020 is described fully in this paper, which has been accepted for publication in the Astrophysical Journal. We are also providing a python notebook showing how to use the catalogues. Released around five… Read More »

A first look at the Spitzer Legacy Survey for Euclid

By | November 27, 2019

By combining mid-infrared light with optical and near-infrared observations one can find the most distant objects in the Universe, right back to the start of cosmic time. That is because the expansion of the Universe causes the light emitted by receding objects to be shifted towards the red. For the most distant objects, only the… Read More »

Master-2 internship 2019: Measuring cosmic magnification in the Euclid deep fields

By | October 14, 2018

The objective of this internship is to make a measurement of the cosmic magnification effect in prototype Euclid deep field data. Background ESA’s Euclid satellite aims to uncover the nature of dark matter and dark energy by precisely measuring shapes and positions of a billion galaxies taken with the wide-field VIS camera. Dark matter induces… Read More »

Final CFHTLS TERAPIX dataset available at CALET

By | October 4, 2018

The Canada-France-Hawaii Telescope Legacy survey, or CFHTLS, was a wide-field survey sky-survey carried out using the Megacam camera on CFHT. CFHTLS had two components: a “wide” and “deep” survey. The deep survey comprised four deep fields observed in ugriz bands and the wide survey was a shallower survey covering around 140 square degrees in five… Read More »

Processing the fourth UltraVISTA data release: a status report

By | June 28, 2018

UltraVISTA is a deep near-infrared survey on the COSMOS field, and this article describes work underway at CALET to process the fourth UltraVISTA data release, DR4. DR4 is on-track to be publicly released world-wide at the end of 2018 via the ESO archive centre. Some background The UltraVISTA survey started in 2009 as one of… Read More »