deep survey

The phrase deep survey is generally used 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 (often referred to as a deep field) generally of no more than a square degree, often much less. A field may be devised for the survey or the survey may reuse an earlier-established deep field, e.g., to image it in more depth or in a different part of the EMR spectrum, or for spectrography. Example deep surveys:

• GOODS.
• Hawaii K-band Galaxy Survey.
• LABOCA Extended Chandra Deep Field-South Submillimetre Survey.
• NOAO Deep Wide-Field Survey.
• ROSAT Deep Survey.
• Spitzer Extended Deep Survey.
• Subaru XMM-Newton Deep Survey.
• UKIDSS.
• VIMOS-VLT Deep Survey.