During the final months of 2MASS observatory operations, a campaign of targeted "long exposure" observations was carried out during times when no previously unscanned parts of the sky were available for the main survey. These observations used the same freeze-frame scanning technique employed for the survey, but with READ2-READ1 exposures six times longer than was used for normal survey observations (hence they are referred to as "6x" observations). The 2MASS 6x measurements were intended to probe ~1 magnitude deeper than the main survey in unconfused regions.
Approximately 590 deg2 of sky distributed in 30 targeted regions were scanned at least once using the long exposures. Most of this area is concentrated in two large, comprehensive surveys of the Large and Small Magellanic Clouds, 383 deg2 and 127 deg2, respectively. Twenty-eight additional smaller fields were mapped in the 6x mode from both observatories, covering targets that include the Pleiades open cluster, galactic star formation complexes, M31, nearby galaxy clusters and the Lockman Hole.
The 6X Scan Information Table provides basic metadata for each survey mode scan taken during 2MASS 6x observations.
The MIPSGAL Survey is a Legacy Program of the Spitzer Space Telescope that imaged the 24 and 70 micron emission along the inner disk of the Milky Way (Carey et al. 2009). These mid-infrared bands are sensitive to the thermal emission radiated by interstellar dust grains that reside within a broad range of environments such as the envelopes of evolved stars, circumstellar disks and infalling envelopes surrounding young stellar objects, HII regions, supernova remnants, and the extended domains of dense, interstellar clouds. With its primary 24 micron band, MIPSGAL provides a critical wavelength measurement, which links the near infrared data from 2MASS and GLIMPSE to the far-infrared/submillimeter information for both point sources and diffuse emission.
The MIPSGAL 24 micron Archive contains the most complete list of MIPSGAL sources.
The MIPSGAL Survey is a Legacy Program of the Spitzer Space Telescope that imaged the 24 and 70 micron emission along the inner disk of the Milky Way (Carey et al. 2009). These mid-infrared bands are sensitive to the thermal emission radiated by interstellar dust grains that reside within a broad range of environments such as the envelopes of evolved stars, circumstellar disks and infalling envelopes surrounding young stellar objects, HII regions, supernova remnants, and the extended domains of dense, interstellar clouds. With its primary 24 micron band, MIPSGAL provides a critical wavelength measurement, which links the near infrared data from 2MASS and GLIMPSE to the far-infrared/submillimeter information for both point sources and diffuse emission.
The MIPSGAL 24 micron Catalog contains the high reliability subset of MIPSGAL sources.
The MIPS Local Galaxies program compiles the Spitzer MIPS observations of all available galaxies in several Herschel-SPIRE Local Galaxies Guaranteed Time Programs, including the Very Nearby Galaxies Survey (VNGS), Dwarf Galaxy Survey (DGS), Herschel Reference Survey (HRS), and Herschel Virgo Cluster Survey (HeViCS).
The MIPS Local Galaxies program compiles the Spitzer MIPS observations of all available galaxies in several Herschel-SPIRE Local Galaxies Guaranteed Time Programs, including the Very Nearby Galaxies Survey (VNGS), Dwarf Galaxy Survey (DGS), Herschel Reference Survey (HRS), and Herschel Virgo Cluster Survey (HeViCS).
Spitzer IRAC Observations of the Extended Disk and Halo of M31 (M31 IRAC) covers the major and minor axes of M31 with total lengths of 6.6 and 4.4 degrees, respectively. The M31 IRAC Catalog includes 426,529 sources.
Version 2.3 of the Midcourse Space Experiment (MSX) Point Source Catalog (PSC), which supercedes the version (1.2) that was released in 1999, contains over 100,000 more sources than the previous version. The photometry is based on co-added image plates, as opposed to single-scan data, which results in improved sensitivity and hence reliability in the fluxes. Comparison with Tycho-2 positions indicates that the astrometric accuracy of the new catalog is more than 1'' better than that in Version 1.2. In addition to the Galactic plane, Areas Missed by the Infrared Astronomical Satellite (IRAS), and the Large Magellanic Cloud, which were included in the previous catalog, Version 2.3 includes data from the Small Magellanic Cloud, eight nearby galaxies, and several molecular clouds and star forming regions.
The Multiwavelength Survey by Yale-Chile (MUSYC) consists of deep optical medium-band and broadband optical and near-IR imaging of the ~30'x30' Extended Chandra Deep Field South. This field includes the GOODS-South field and the Hubble Ultra Deep Field, and covers the same area as the SIMPLE Spitzer Legacy program.
The Multiwavelength Survey by Yale-Chile (MUSYC) consists of deep optical medium-band and broadband optical and near-IR imaging of the ~30'x30' Extended Chandra Deep Field South. This field includes the GOODS-South field and the Hubble Ultra Deep Field, and covers the same area as the SIMPLE Spitzer Legacy program.
The Multiwavelength Survey by Yale-Chile (MUSYC) consists of deep optical medium-band and broadband optical and near-IR imaging of the ~30'x30' Extended Chandra Deep Field South. This field includes the GOODS-South field and the Hubble Ultra Deep Field, and covers the same area as the SIMPLE Spitzer Legacy program.
