This website lists the cookbooks that involve the use of the SSC
software tool SPICE.
IRS-SL Mapping-mode SPICE
extraction
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NGC4579 is an extragalactic source which was observed as part of
the SINGS Legacy program. The source was mapped out using both the low
and high resolution modules of the IRS. In this cookbook we outline
the steps required to go from the zip file you get from the Spitzer
data archive to a basic spectrum using the spectral extraction tool
called SPICE. The illustration here is for only one position in the
spectral map but can be used for any observation performed in the
staring mode or spectral mapping mode.
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IRS-SL2 Staring-mode SPICE Point Source extraction |
This is a demonstration of using SPICE to extract a spectrum from IRS data for the object Herbig-Haro 46/47. We outline the basic steps for using SPICE as a generic example for handling any point source data obtained with Spitzer IRS-Staring Mode. The steps are analogous to those outlined here. This specific example involves an extraction from the SL2 module, but it is generally applicable to all of the IRS modules. This demonstrates only a point source extraction; SPICE is currently capable of extracting spectra for extended sources. For a discussion, see the IRS Extended Source calibration page on our website.
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IRS-LL2 Moving target Background-subtraction SPICE extraction |
This demonstration uses SPICE to extract a spectrum from IRS data of the Comet Schwassmann-Wachmann-1. We describe the steps required to background-subtract your data and use the SPICE tool to perform a custom extraction of your target's spectrum. Background subtraction is particularly important for targets on a high background, such as that found in the ecliptic plane. Similarly for a moving target such as a comet, a custom extraction, rather than the standard pipeline product, may be important to separate the effects of nucleus and coma, and to otherwise correctly extract a slightly extended object, or one with an unusual morphology. This demonstration then, serves as a generic example for handling moving target data obtained with Spitzer IRS-Staring Mode. This specific example involves an extraction from the LL2 module, but it is generally applicable to all of the IRS modules.
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IRS-LL1 Mapping-mode SPICE Optimal extraction |
In this cookbook, we demonstrate the data reduction strategies used
for ultradeep IRS spectroscopy. This page follows the IRS Best
Practices memo for the same observation, but we now include optimal
extraction in SPICE which was not previously available. The ultradeep
proof of concept data (PID=252) included observations in SL1, LL2, and
LL1. We use the LL1 data here. The target was a z=2.69 ULIRG. A total
of 12 hours on-source integration was performed, using mapping-mode to
place the target at 6 positions along the slit.
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