The Deep UKIRT NEar-Infrared Steward Survey (DUNES2; pronounced as "Dunes" for simplicity) is an effort to increase near-infrared coverage for the Subaru/Hyper Suprime-Cam (HSC) Deep fields, using the wide-field WFCAM near-infrared camera on UKIRT. With a total observing time of ~260 hours allocated between 2014 and 2018, the DUNES2 survey has observed the parts of the HSC-Deep fields without any existing near-infrared data, the four flanking fields of E-COSMOS (3 deg2; J/H/K) and DEEP2-3 field (4.5 deg2; J/K), down to J/H~23.2 & K~23 AB mag. In terms of observing strategy and data characteristics, DUNES2 is similar to the UKIDSS Deep Extragalactic Survey (DXS). It also added H-band coverage to the central part of ELAIS-N1 (1.5 deg2), which already has the UKIDSS/DXS J/K-band data.
Hyper Suprime-Cam (HSC) is Subaru Telescope's newly commissioned prime-focus CCD mosaic camera with a wide field of view (D=1.5 deg). The Subaru Observatory will allocate ~300 nights of Subaru time over a ~5-year period to conduct a large extragalactic survey with three components: Wide (1400 deg2; r~26 AB mag), Deep (27 deg2; r~27 AB mag), and Ultradeep (3.5 deg2; r~28 AB mag). The HSC-Deep survey targets four fields, XMM-LSS, E-COSMOS, ELAIS-N1, and DEEP2-3, and the DUNES2 survey is designed to provide deep near-infrared coverage for those HSC-Deep fields that are lacking such data, complementing the existing near-infrared surveys such as UKIDSS/DXS & UDS, UltraVISTA, and VIDEO.
DUNES2 Survey
Subaru/HSC Survey
Near-infrared Surveys (for HSC-Deep)
CLAUDS (CFHT u-band survey for HSC-Deep)
The DUNES coverage is shown as orange squares/rectangles below.
and 18 Co-Is on the original proposal.