UDS Data Summary
The UDS is a deep infrared imaging survey, centred on the Subaru-XMM Deep Field (J0218-05). A survey area of 0.8 sq. degrees is achieved by tiling 4 observations with the UKIRT Wide-Field Camera. The UDS is already the deepest J,H,K imaging survey ever conducted over such a large area and will continue taking data until 2013.
UKIDSS Release (DR8)
The current data release (UKIDSS DR8) reaches median depths of J=24.9, H=24.2, K=24.6 (5σ, AB). This was released to the UKIDSS community on 18 October 2010. Imaging and catalogues are available from the WFCAM Science Archive. The 2009B observing season was the most successful to date, almost doubling the exposure time. Further information is available from the UDS DR8 information page.
World Release (DR3)
UKIDSS data are released to the world 18 months after the internal ESO release. The latest world releases are the UKIDSS DR3 and DR5, made public in June 2009 and February 2011 respectively. Data from the DR3 release are available from our UDS DR3 information page, which includes a range of additional data products.
Citing UKIDSS when using UDS data
When you use UDS data please credit the efforts of those who built the camera and implemented the surveys. Wording similar to the following would be appreciated: 'The UKIDSS project is defined in Lawrence et al (2007). Further details on the UDS can be found in Almaini et al. (in prep). UKIDSS uses the UKIRT Wide Field Camera (WFCAM; Casali et al, 2007). The photometric system is described in Hewett et al (2006), and the calibration is described in Hodgkin et al. (2009). The pipeline processing and science archive are described in Irwin et al (in prep) and Hambly et al (2008)."
Multi Wavelength Imaging
The legacy value of the UDS survey is significantly enhanced by the rich array of multiwavelength data in this field. The key datasets are outlined below. Click on the dataset for more information.
|Facility||Waveband||Area (sq deg)||Public Data?*||Person to Contact|
|UKIRT WFCAM||J,H,K||0.8||Y (DR3)||Almaini|
|SPITZER IRAC/MIPS||3.6-24 μm||0.8, 0.17||Y (images)||Dunlop, Fazio|
* This column describes whether the primary dataset described is publicly available today. Click for further information.
A number of groups have taken spectra in the UDS field, including programmes led by Masayuki Akiyama (Subaru FOCAS and AAT 2dF), Chris Simpson (VLT VIMOS), Scott Croom (AAOmega) and Ian Smail (AAOmega). A small number of published redshifts can also be found in a range of papers, including Yamada et al. 2005, Simpson et al. 2006, Geach et al. 2007, van Breukelen et al. 2007, Ouchi et al. 2008, Smail et al. 2008 , Ono et al. 2010.
A compilation of over 4000 redshifts can be found here, combining data from the projects led by Akiyama, Simpson, Croom, Geach, Smail and van Breukelen. Most of these are unpublished, and the reliability cannot be guaranteed. If these redshifts are used in a publication please cite Simpson et al. (2010; in prep), Akiyama et al. (2010; in prep) and Smail et al. (2008). A description of the catalogue columns can be found here. Please note that this catalogue contains a high fraction of AGN. Many can be identified by cross-correlation with the X-ray and radio catalogues described below, or from listed spectroscopic features (where available).
An ESO Large Programme (UDSz) is also underway, targeting ~3500 IR-selected galaxies to a limit of KAB=23. The data are currently being reduced and analysed. The first public release is expected in late 2013. Please contact the PI (Omar Almaini) for details.
X-ray data was obtained as part of the Subaru-XMM Deep Survey (SXDS). This is available from the XMM-Newton Survey Science Centre. There are 7 contiguous fields with a total exposure of 400ks. The catalogue of X-ray sources is available from the paper of Ueda et al. 2008. This is also provided here for convenience.
U-band data from CFHT Megacam are currently being reduced and expected to reach U~27.5 (5σ). Contact the PIs (Almaini & Foucaud) for details.
Deep Subaru imaging data is publicly available from the Subaru archive or from the SXDS DR1 release page. Details are provided in Furusawa et al. 2008. The 3-σ (AB) depths are B=28.4, V=27.8, R=27.7, i'= 27.7, z'= 26.7. Mosaics resampled to the UDS image frame are available here courtesy of Michele Cirasuolo. Catalogues matched to the UDS DR3 release are available from the UDS DR3 page.
The UDS will be included in the VISTA VIDEO survey (PI: Jarvis), which will add Y-band imaging to a depth of YAB~24.6 in addition to expanding the J,H,K coverage over 4.5 sq degrees to ~24AB. The survey begins in late 2010, with the first public release approximately one year later.
Spitzer observed the UDS as part of the SWIRE survey. Much deeper data were recently been obtained from a SpUDS Spitzer Legacy Survey (PI: Dunlop) using IRAC and MIPS, reaching ~24AB at 3.6 and 4.5 microns. Please contact Jim Dunlop for details. Deeper IRAC data is being obtained in the central 0.17 sq degree region as part of the SEDS project (PI: Giovanni Fazio), reaching ~26AB at 3.6 and 4.5 microns.
The UDS will be observed by the Herschel Space Observatory within the HerMES programme (PI: Oliver) using both PACS and SPIRE.
Submillimetre data is available from the SHADES survey of the central region of the UDS field. Source lists were published in Coppin et al. (2006), and can be found on NED. The field is also the location of the SCUBA2 Cosmology Legacy Survey, to commence in 2010. Maps and catalogues from the AzTEC 1.1mm survey are published in Austermann et al. 2010.
VLA radio data has been obtained at 1.4 GHz using a combination of A, B and C configurations (PIs: Simpson & Ivison). The final combined VLA map is in preparation (contact Rob Ivison for details), reaching ~7 μJy per beam (rms) in the centre of the field. The 100μJy catalogue from the B/C-array data can be obtained from Simpson et al. 2006 .
The centre of the UDS field will be imaged with the new HST WFC3 as part of the 900-orbit CANDELS HST Multi-cycle Treasury Program (PI: Faber).