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The Infrared Telescope in Space (IRTS)
is a cryogenically cooled, small infrared
telescope that flew from March - April in 1995.
It surveyed approximately 10% of the sky with a
relatively wide beam during its 20 day mission.
An overview
of IRTS, as well as more detailed
information is provided by the Institute of
Space and Astronautical Science (ISAS),
and the Infrared Astronomical Databese of IRTS
(DARTS), in
Sagamihara, Japan.
Four focal-plane instruments,
the Near-Infrared Spectrometer (NIRS),
the Mid-Infrared Spectrometer (MIRS),
the Far-Infrared Line Mapper (FILM), and
the Far-Infrared Photometer (FIRP) made
simultaneous observations of the sky at
wavelengths ranging from 1 to 1000 um.
Instrument summary information can be found
here.
The IRTS data coverage is represented as
color overlays (footprints) in the all-sky
image above, to indicate where IRTS made its
observations. This all-sky image is made from
the IRAS Sky Survey Atlas (ISSA) data; the footprints
(positions) of IRTS image fits files
using the FILM and FIRP instruments are
indicated as red rectagles; point
source positions from NIRS are shown as
yellow
dots, and positions of sources with
spectral information from MIRS are shown
as cyan dots.
There are 1067 fits images from FILM and FIRP,
they are approximately 8 X 8 degrees, and lie
along the strip indicated in the red pattern on
the all-sky map. The 14294 point sources and
536 spectral sources fall on a narrower strip
of ~4 degrees, within the same regions of the
sky as the image data.
Also available are IRTS
image "cutouts"
using IRSA's
Cutouts Service, which is a general tool to create single or multiple small FITS
(and JPEGs) image cutouts of datasets archived at IRSA.
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