(survey region, field)
(portion of the celestial sphere where a survey's observations aim)
The phrase survey field (or survey region or sometimes field of view)
is used for the portion of the celestial sphere where an
astronomical survey's observations are carried out.
The phrase all sky survey means just that,
or sometimes just a substantial portion of the sky, e.g.,
when performed from a single ground location.
Surveys often reuse a past survey field to carry out
additional observations, e.g., other parts of the electromagnetic radiation spectrum,
greater depth, or spectrography.
A deep field is a small field used for
extreme depth, i.e., looking for distant and therefore faint objects.
Atacama Cosmology Telescope (ACT)
Cosmic Evolution Survey (COSMOS)
deep field (DF)
Deep Lens Survey (DLS)
Extended Chandra Deep Field-South Survey (ECDFS)
Extended Groth Strip (EGS)
Green Bank Telescope (GBT)
Hawaii K-band Galaxy Survey
Hubble Deep Field (HDF)
Hubble Deep Field South (HDF-S)
Hubble Ultra-Deep Field (HUDF)
LABOCA Extended Deep Field South Submillimetre Survey (LESS)
Lupus Transit Survey
linearly variable filter (LVF)
NOAO Deep Wide-field Survey (NDWFS)
Subaru Deep Field (SDF)
Spitzer HETDEX Exploratory Large Area Survey (SHELA)
Spitzer Space Telescope (SST)
Subaru XMM-Newton Deep Survey (SXDS)
Ultraviolet Hubble Ultra-deep Field (UVUDF)