Two Micron All Sky Survey (2MASS)

Lifetime:	1997-2001
Wavelength:	J-band (1.235 µm) H-band (1.662 µm) K_s-band (2.159 µm)
Area Coverage:	All Sky
Instruments:	1.3-m telescopes at Mt. Hopkins and CTIO, Chile 3-channel cameras using 256x256 arrays of HgCdTe detectors
Science Products:	Point Source Catalog (PSC) consisting of over 500 million stars and galaxies Extended Source Catalog (XSC) consisting of 1.6 million resolved galaxies Large Galaxy Atlas (LGA) consisting of ~600 nearby galaxies and globular clusters All-Sky Quicklook and Atlas images providing full coverage of the infrared sky
Canonical Paper:	Skrutskie et al. (2006) Please include the following standard acknowledgment in any published material that makes use of 2MASS data products: "This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation."

2MASS Image Services	Delivering Atlas images from the 2MASS All-Sky Release.
General Catalog Search	Access All-Sky catalogs.
Bulk Catalog Download	Download the 2MASS All-Sky Release Catalogs and Scan Information Table here.
Finder Chart	Visualization tool to cross-compare image data sets from various missions.

Large Galaxy Atlas	Retrieve multiple FITS images covering a wide area of the sky from the 2MASS Large Galaxy Atlas.
Six Degree Mosaics	For users wishing to visualize regions of the sky that are significantly larger than the All-Sky Atlas Images, or that fall close to the edge of an Atlas Image, IRSA has created 6x6 degree 2MASS mosaics.
LH: Lockman Hole 2MASS 6x Ancillary Data	Contributed data of deep 2MASS observations of the Lockman Hole region.

2MASS Website	2MASS site at IPAC.
2MASS Data Release Documentation	2MASS Data Release Explanatory Supplements and FAQ, from the 2MASS website.