Astrophysics (Index)About

Two Micron All-sky Survey

(near-infrared survey of both hemispheres)

The Two Micron All-sky Survey was a near-infrared survey of the entire sky by two dedicated telescopes, at Fred Lawrence Whipple Observatory, Mount Hopkins, Arizona and Cerro Tololo Inter-American Observatory in Chile, with observations carried out between 1997 and 2001. The sky was imaged in three passbands: J (1.25 μm), H (1.65 μm), and Ks (2.17 μm), i.e., the JHK photometric system. Final data was released in 2003. Targets included galaxies obscured by Milky Way light, brown dwarfs, low mass stars, and general cataloging. It produced a astronomical catalog of over three million objects and many 2MASS designators of objects are now in common use.

(survey,infrared,NSF,galaxies,stars,all sky,past)
Further reading:
1.25μm240THz992meVbeginTwo Micron All-sky Survey
2.17μm138THz571meVendTwo Micron All-sky Survey
2MA2MA 1835-3259abbreviated
2MASP2MASP J0345432+254023prototype survey: or "2MASSP"
2MASS2MASS J16264502-2423077 
2MASSI2MASSI J0937347+293142incremental release
2MASSW2MASSW J0746425+200032working database
2MASX2MASX J00482185-2507365"Extended source catalogue"
2MUCD2MUCD 10390ultracool dwarf

Referenced by pages:
astronomical survey
Bologna Catalog of Globular Clusters (Bol)
Two Micron Sky Survey (IRC)
Infrared Survey Facility (IRSF)
JHK photometric system (JHK)
TW Hydrae association (TWA)