Hendrik Hildebrandt - AIfA Bonn

36 Pages·2015·18.21 MB·German

The Kilo-Degree
Survey (KiDS)
Hendrik Hildebrandt - AIfA Bonn
KiDS:
1500 sq. deg. survey
•
VLT Survey Telescope (VST)
•
four bands: ugri
•
superb image quality
•
same footprint as VIKING
•
overlap with 2dF, GAMA,
•
SDSS
The KiDS Team
Konrad Kuijken
Massimo Viola Catherine Heymans
Henk Hoekstra Ami Choi Hendrik Hildebrandt
Marcello Cacciato Alexandra Amon Patrick Simon
Maciek Bilicki Yanchuan Chai Thomas Erben Kristian Zarb Adami
Mario Radovich
Ricardo Herbonnet Benjamin Giblin Axel Buddendiek Ian Fenech Conti
Margot Brouwer Alexander Mead Alexandru Tudorica
PADUA
Cristobal Sifon John Peacock Reiko Nakajima MALTA
Jelte de Jong Peter Schneider Nicola Napolitano
Ewout Helmich EDINBURGH Douglas Applegate Massimo Brescia
Ludovic van Waerbeke
Nancy Irrisari Dominik Klaes Edwin Valentijn Massimo Cappacioli
Joachim Harnois-Deraps
Martin Borstad Eriksen Alistair Edge Oliver Cordes Gijs Verdoes Kleijn Stefano Cavuoti
Alireza Hojjati
Jeroen Franse Tim Schrabback John McFarland Giovanni Covone
Tilman Troester
Arthur Jakobs DURHAM Hugo Buddelmeijer Massimo Dall’Ora
Fabian Köhlinger BONN Gert Sikkema Fedor Getman
VANCOUVER
Berenice Pila-Diez Kor Begeman Aniello Grado
Remco van der Burg Andrey Belikov Francesco La Barbera
Elisabetta Semboloni Danny Boxhorn Giuseppe Longo
Carlo Enrico Petrillo Maurizio Paolillo
LEIDEN Willem-Jan Friend Emanuella Puddu
Edo van Uitert Leon Koopmans Agatino Riffato
Benjamin Joachimi Reynier Peletier Nivya Roy
Lance Miller
Chris Blake
Tom Kitching Creszenzo Tortora
Elisa Chisari
Shahab Joudaki
Will Sutherland Pedro Lacerdo GRONINGEN Zhuoyi Huang
Julian Merten
SWINBURNE
LONDON MPS LINDAU NAPLES
OXFORD
Credit: ESA/Hubble & NASA
Credit: M. Sachs
Mellier (1999)
Shape measurements
Bridle et al. (2008)
KiDS photometric redshifts
0.09
spec COSMOS
0.08
0.07 ∑ p(z) CDFS
0.06
)
c
e
p
s 0.05 19<r<24
_
z
N( (VST data
0.04

,
)
z
(
P 0.03
from VOICE
0.02
programme
0.01
0
—thanks!)
0 0.5 1 1.5 2 2.5 3
z
0.18 0.18 0.14 0.06 0.05 19<r<24
0.16 0.16 0.045
0.12
0.05 19<r<24
0.04 1.2<z<7.0
0.14 0.14
0.1 0.035
0.12 0.12 0.04 0.9<z<1.2
c) c) c) c) c)
e e e e e 0.03
sp 0.1 sp 0.1 sp 0.08 sp sp
_ _ _ _ _
z z z z 0.03 z 0.025
z), N( 0.08 z), N( 0.08 z), N( 0.06 z), N( z), N( 0.02
P( 0.06 P( 0.06 P( 19<P(r<24 0.02 P(
19<r<24 19<r<24 0.04 0.6<z<0.9 0.015
0.04 0.0<z< 00.0.34 0.3<z<0.6
0.01
0.01
0.02
0.02 0.02 0.005
0 0 0 0 0
0 0.5 1 1.5 2 2.5 0 3 0.5 1 1.5 2 2.5 03 0.5 1 1.5 2 2.5 03 0.5 1 1.5 2 2.5 30 0.5 1 1.5 2 2.5 3
z z z z z
Kuijken et al. (2015)
KiDS features
• Telescope built with weak lensing in mind.

Very well controlled PSF.
• Survey delayed a lot. Team was very well prepared!!
• Small, experienced (CFHTLenS) team working on the lensing
science.
• Overlap with VIKING 

-> only wide, deep, and well-matched optical+NIR survey

Preparation for Euclid and WFIRST.
• KiDS + CFHTLenS + RCSLenS + some smaller CFHT projects

= ~3000 sq. deg. of very high quality lensing data.
Dark energy
CFHTLenS collaboration