Extragalactic Surveys

Survey Characteristics

Information on each of the surveys has been compiled into a Google Spreadsheet. We encourage representatives of the various X-ray surveys to update the information in the spreadsheet so that it is kept current. To do so, sign up for a Google account (for which you can use an existing email address), and then contact us at xsurveys06@cfa.harvard.edu so that we can give you editing access to the spreadsheet.

Anyone with a Google account is able to view the spreadsheet data. The data may be exported in several formats, such as HTML, PDF, and XLS.

The spreadsheet contains the following information for each survey:

X-Ray/OIR/Radio/UV Survey Name
If a name is underlined it is a link to the website for that survey. Click on the little pop-up button near the name to access the web site.
X-ray/OIR/Radio/UV Telescope
X-ray/OIR/Radio/UV Band or Filter Name (keV or othere)
"Depth" of survey
Variously defined limiting flux or magnitude.
Turnover Flux fT (log cgs)
Flux in primary band where flux histogram peaks
Sky Area @fT (deg sq)
Sky area covered where flux limit >=fT
Total Sky Area (deg sq)
Sky area covered at brightest flux limits
Imaging Band1
Filter Name
Common filter or bandpass name
Central Wavelength
( for optical, µm for IR or submm, cm for radio)
Turnover Mag
Mag in Band1 where mag histogram peaks
Imaging Band2
Refer to descriptions for "Imaging Band1" field.
# Spectr. Redshifts
Number of photometric redshifts where no Spec-z available
# Phot. Redshifts
Survey redshift completeness to chosen mag limit
Redshift/ID Completeness
Completeness MagLim
Chosen mag limit defining redshift completeness
Completeness SkyArea
Sky Area (sq deg) wherein redshift completeness is defined, often a subsample of the full survey area.