St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

The Hawk-I UDS and GOODS survey (HUGS) : survey design and deep K-band number counts

Thumbnail
View/Open
Wild_2014_A_A_TheHawk.pdf (3.697Mb)
Date
10/2014
Author
Fontana, A.
Dunlop, J.S.
Paris, D.
Targett, T.A.
Boutsia, K.
Castellano, M.
Galametz, A.
Grazian, A.
McLure, R.
Merlin, E.
Pentericci, L.
Wuyts, S.
Almaini, O.
Caputi, K.
Chary, R.-R.
Cirasuolo, M.
Conselice, C.J.
Cooray, A.
Daddi, E.
Dickinson, M.
Faber, S.M.
Fazio, G.
Ferguson, H.C.
Giallongo, E.
Giavalisco, M.
Grogin, N.A.
Hathi, N.
Koekemoer, A.M.
Koo, D.C.
Lucas, R.A.
Nonino, M.
Rix, H.W.
Renzini, A.
Rosario, D.
Santini, P.
Scarlata, C.
Sommariva, V.
Stark, D.P.
Van Der Wel, A.
Vanzella, E.
Wild, V.
Yan, H.
Zibetti, S.
Funder
European Research Council
Grant ID
ERC-2012-StG-20111012
Keywords
Surveys
Galaxies: evolution
QB Astronomy
QC Physics
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
We present the results of a new, ultra-deep, near-infrared imaging survey executed with the Hawk-I imager at the ESO VLT, of which we make all the data (images and catalog) public. This survey, named HUGS (Hawk-I UDS and GOODS Survey), provides deep, high-quality imaging in the K and Y bands over the portions of the UKIDSS UDS and GOODS-South fields covered by the CANDELS HST WFC3/IR survey. In this paper we describe the survey strategy, the observational campaign, the data reduction process, and the data quality. We show that, thanks to exquisite image quality and extremely long exposure times, HUGS delivers the deepest K-band images ever collected over areas of cosmological interest, and in general ideally complements the CANDELS data set in terms of image quality and depth. In the GOODS-S field, the K-band observations cover the whole CANDELS area with a complex geometry made of 6 different, partly overlapping pointings, in order to best match the deep and wide areas of CANDELS imaging. In the deepest region (which includes most of the Hubble Ultra Deep Field) exposure times exceed 80 hours of integration, yielding a 1-σ magnitude limit per square arcsec of 28.0 AB mag. The seeing is exceptional and homogeneous across the various pointings, confined to the range 0.38-0.43 arcsec. In the UDS field the survey is about one magnitude shallower (to match the correspondingly shallower depth of the CANDELS images) but includes also Y-band band imaging (which, in the UDS, was not provided by the CANDELS WFC3/IR imaging). In the K-band, with an average exposure time of 13 hours, and seeing in the range 0.37-0.43 arcsec, the 1-σ limit per square arcsec in the UDS imaging is 27.3 AB mag. In the Y-band, with an average exposure time 8 h, and seeing in the range 0.45-0.5 arcsec, the imaging yields a 1-σ limit per square arcsec of 28.3 AB mag. We show that the HUGS observations are well matched to the depth of the CANDELS WFC3/IR data, since the majority of even the faintest galaxies detected in the CANDELS H-band images are also detected in HUGS. Finally we present the K-band galaxy number counts produced by combining the HUGS data from the two fields. We show that the slope of the number counts depends sensitively on the assumed distribution of galaxy sizes, with potential impact on the estimated extra-galactic background light.
Citation
Fontana , A , Dunlop , J S , Paris , D , Targett , T A , Boutsia , K , Castellano , M , Galametz , A , Grazian , A , McLure , R , Merlin , E , Pentericci , L , Wuyts , S , Almaini , O , Caputi , K , Chary , R-R , Cirasuolo , M , Conselice , C J , Cooray , A , Daddi , E , Dickinson , M , Faber , S M , Fazio , G , Ferguson , H C , Giallongo , E , Giavalisco , M , Grogin , N A , Hathi , N , Koekemoer , A M , Koo , D C , Lucas , R A , Nonino , M , Rix , H W , Renzini , A , Rosario , D , Santini , P , Scarlata , C , Sommariva , V , Stark , D P , Van Der Wel , A , Vanzella , E , Wild , V , Yan , H & Zibetti , S 2014 , ' The Hawk-I UDS and GOODS survey (HUGS) : survey design and deep K-band number counts ' , Astronomy & Astrophysics , vol. 570 , A11 . https://doi.org/10.1051/0004-6361/201423543
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/201423543
ISSN
0004-6361
Type
Journal article
Rights
Reproduced with permission from Astronomy & Astrophysics, © ESO
Description
A.F. and J.S.D. acknowledge the contribution of the EC FP7 SPACE project ASTRODEEP (Ref. No: 312725). J.S.D. also acknowledges the support of the Royal Society via a Wolfson Research Merit Award, and the support of the ERC through an Advanced Grant. D.C.K. and S.M.F. were supported by US NSF grant AST08-08133. V.W. acknowledges support of the ERC through the starting grant SEDmorph. R.J.M. acknowledges ERC funding via the award of a consolidator grant.
Collections
  • University of St Andrews Research
URL
http://adsabs.harvard.edu/abs/2014A%26A...570A..11F
URI
http://hdl.handle.net/10023/5871

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter