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deep field

(DF)
(survey field subject to lengthy observation to identify distant galaxies)

The phrase deep field is a small survey field for surveys carrying out lengthy observations (long exposure time) to identify very distant phenomena, e.g., galaxies and quasars at high redshift. The observation time can be days or more, typically focused on a region of no more than a square degree, often much less. Often the field (or a portion of it) is subsequently used for other surveys, to cover more spectra, to add depth, and/or to follow up with spectrography.

The 1995 Hubble Deep Field is the best known and perhaps the originator of the term. Other examples of deep fields and surveys fixed on deep fields:

The terms deep drilling and deep drilling fields are sometimes used when a survey includes both a relatively wide field to indicate a subset in which longer exposures will be carried out.


(surveys,galaxies,quasars)
http://en.wikipedia.org/wiki/Hubble_Deep_Field

Referenced by:
Chandra Deep Field North (CDFN)
Chandra Deep Field South (CDFS)
CFHTLS
deep survey
DEVILS
Extended Chandra Deep Field-South Survey (ECDFS)
Hubble Deep Field (HDF)
Hubble Deep Field South (HDF-S)
Hubble Ultra-Deep Field (HUDF)
LABOCA Extended Deep Field South Submillimetre Survey (LESS)
MIGHTEE
Molecular Deep Field
Subaru Deep Field (SDF)
survey field
Subaru XMM-Newton Deep Survey (SXDS)
Ultraviolet Hubble Ultra-deep Field (UVUDF)

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