CFHTLS

The CFHTLS (Canada-France-Hawaii Telescope Legacy Survey) was a photometric survey carried out from 2003 to 2009 using the Canada-France-Hawaii Telescope (CFHT). It included three "sub-surveys":

• 4-square-degree deep survey for distant supernovae: four separate deep fields labeled D1, D2, D3, and D4.
• 155-square-degree survey for galaxies and transients.
• 410-square-degree survey of Milky Way stars.