UV/Optical/NIR imaging


The UltraVISTA program aims to provide extremely deep near-infrared YJHKs and narrow-band NB118 photometry on the COSMOS field. The survey is divided into two components, the "deep" component which covers a 1.5 x 1.2 deg contiguous region in the COSMOS field, and the "ultra-deep" component which covers 4 ultra-deep stripes in the field.

Contact: Henry McCracken - h.j.mccracken [at] gmail.com

ULTRAVISTA footprint

Figure: UltraVISTA Ultra-deep and deep surveys and ACS coverage. North is up and east is to the left.

Subaru Hyper Suprime-Cam

We have used University of Hawaii observing time (PI: G. Hasinger) to obtain new, deep optical images with the Subaru Hyper Suprime-Cam (HSC) instrument. 
We have obtained a total of 2, 4, 2, and 6 hours exposure in the g, i, z, and y-band, respectively in two observing runs in March 2014 and January 2015.
The seeing was between 0.5 and 1.1”. For the y-band in particular, these observations are the deepest ever taken in the COSMOS field. The y-band limit
is about 1 magnitude deeper than the Ultravista data. The following image shows a comparison of the y-band image from Ultravista (left) and HSC (right).

Contact: G. Hasinger - hasinger [at] ifa.hawaii.edu



Other programs

Significant amounts of time have been allocated to COSMOS with ground based telescopes. These are summarized in the table below.

Telescope Bands Area Instruments Ref/contact
CFHT u*,i*, H, Ks 2 MegaPrime, WIRCAM Henry McCracken - h.j.mccracken [at] gmail.com
CFHT-LS u*,g*,r*,i*,z* 1 MegaPrime Henry McCracken - h.j.mccracken [at] gmail.com

McCracken et al. 2012, Laigle et al. 2015

Henry McCracken - h.j.mccracken [at] gmail.com

Subaru B,g’,V,r’,i’,z’,z’’ + 12 Intermediate and 2 Narrow Bands 2 Suprime-Cam Peter Capak - capak [at] astro.caltech.edu

Mara Salvato - mara [at] mpe.mpg.de

Peter Capak - capak [at] astro.caltech.edu

Blanco Ks 2 ISPI Peter Capak - capak [at] astro.caltech.edu
Mayall Ks 2 FLAMINGOS Peter Capak - capak [at] astro.caltech.edu
Mayall J1,J2,J3,H1,H3, Ks 0.3 NEWFIRM Pieter Van Dokkum - pieter.vandokkum [at] yale.edu