Twenty years ago IRAS gave us what is still our best view of the midinfrared sky' - PowerPoint PPT Presentation

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Twenty years ago IRAS gave us what is still our best view of the midinfrared sky'

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Twenty years ago IRAS gave us what is still our best view of the midinfrared sky' – PowerPoint PPT presentation

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Title: Twenty years ago IRAS gave us what is still our best view of the midinfrared sky'


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Twenty years ago IRAS gave us what is still our
best view of the mid?infrared sky.
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WISE will map the entire sky with resolution
comparable to the few square degrees shown here,
achieving 500 times better sensitivity than IRAS.
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WISE Sensitivity
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WISE will be launched into a Sun-synchronous
orbit in late 2009
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WISE will have an 11-second data-taking exposure
cycle synchronized with the orbit to provide
total sky coverage with overlap between orbits in
6 months following launch.
There will be 8 or more exposures at each
position over more than 99 of the sky.
7
WISE will survey the sky in two near infrared
channels 3.3 and 4.7 µm
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WISE will survey the sky in two mid-infrared
channels 12 and 23 µm
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Galactic Science with WISE
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WISE will detect most of the Main Belt asteroids
larger than 3 km, providing reliable thermal IR
diameters for them.
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A simulated composite WISE image demonstrates how
the motion of an asteroid will be easily detected
Blue 4.7 µm Green 12 µm Red 23 µm
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Known Stars within 25 light-years
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WISE Stars within 25 light-years
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WISE will find the coolest and closest stars to
the Sun
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Extragalactic Science with WISE
SDSS z 6.3 Quasar Ultra-Luminous IR Galaxy
(Lbol 5 x 1013 L? at z 3) L Galaxy at z0.35
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2MASS Large Scale Structure to z 0.1
The WISE survey will reach to z 0.5
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WISE will find the most luminous galaxies in the
Universe Ultra-luminous Infrared Galaxies
(ULIRGs)
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Battery Panel
Magnetometer
FEB
Reaction Wheels
S-Band Transceiver
IMU
RW Electronics
Reaction Wheel
SCA
DEB
MEB
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Payload Status
  • Engineering Unit electronics built and tested
  • Engineering Unit beam splitter built and tested

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Payload Status Cryostat
Secondary Tank
Primary Tank
  • All primary and secondary tank parts are
    fabricated.
  • Assembly underway

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Focal Planes
  • 10242 HgCdTe Detector in Focal Plane Mount
    Assembly

10242 SiAs Detector
Focal Plane Electronics Box
Test Station
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Payload Status Optics
  • All flight mirrors completed, alignment underway
  • Engineering model scanner fully tested, meets all
    requirements
  • See Schwalm et al Poster 164.03 for additional
    information

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The WISE End-to-End Optical System with Embedded
Scanner
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The Optics Separate into Two Independent Modules
The Aft Optics Fore-Optics
The Aft Optics module includes the scanner, a
fold-flat, and a five mirror imager design. It
also supports the Beamsplitter Assembly.
The Afocal Fore-Optics module includes a
five-mirror imager plus a fold mirror. It
attaches to the WISE cryostat, and supports the
Aft Optics
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Aft Optics Module, Including Scanner
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The Aft Optics Fit-Check (Structure Not Yet
Painted)
Beamsplitters focal plane mount here
Scanner
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The Primary Mirror Mounted to the Fore-Optics
Structure. (The Circular Ring Simulates the
Cryostat Interface)
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Back View of the Afocal Telescope and Structure
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WISE End-to-End Optical System
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WISE Telescope
Note the M2 and M1 baffle cones were not
installed at time of photo
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WISE Telescope
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WISE will use a scan mirror to stabilize the
line-of-sight while the spacecraft scans the sky.
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