GALEX

仪器

• 50 cm 口径
• Far UV (FUV) 1350-1780Å
• Near UV (NUV) 1770-2730Å
• 视场1.2deg
• 分辨率 5.5 arcsec at NUV

巡天

• deep Imaging Survey (DIS) - Exposure goal of 30,000s over 80 square degrees of sky. Targets are chosen to have extensive corollary data from other large surveys like COSMOS, DEEP and ELAIS.（typical exposures of 4000 s）

• Medium Imaging survey (MIS) - Single orbit exposures (1,500s) of 1000 square degrees in positions that match the Sloan Digital Sky Survey (SDSS) spectroscopic footprint. The MIS has been extended to cover the Two Degree Field Galaxy Redshift Survey (2dFGRS) and the AA-Omega (WiggleZ) project.

• All-Sky Imaging Survey (AIS) - Exposure time of 100s over 26,000 square degrees of sky reaching a depth of mAB = 20-2 in both bands.

• Nearby galaxy survey(NGS,typical exposures of 4000 s)

• Guest Investigator’s data 1–4 (GI1–4; with typi- cal exposures of 1500 s)