Data Resources

Data Documents

Cookbook Recipes

These documents provide simple "recipes" (i.e., descriptions and guided examples) for common data analysis objectives using SOFIA processed data. They are generally written for a graduate student audience and are intended to be used with the Data Handbooks.

FORCAST Photometry [pdf]
Performing aperture photometry using flux calibrated FORCAST images accessed through Flexible Image Transport System (FITS) files

FORCAST Grism Spectra Series:
I.  Basic Inspection and Assessment [link]
Python tutorial on plotting and analyzing data
II.  Custom Spectral Extraction [link]
Tutorial utilizing Level 2 two-dimensional images produced by the FORCAST pipeline
III.  Basic Line Analysis [link]

HAWC+ Data Recipe with 30 Doradus Publicly Available SDDT Data [link] 
Associated white paper: SOFIA Community Science IHAWC+ Polarimetry of 30 Doradus [link]
Guides users through Python analysis techniques using the 30 Doradus dataset, teaching readers how to probe HAWC+ data cubes and learn basic analysis techniques—such as plotting Stokes parameters, error maps, and polarization vectors—to jump-start their own research.

FIFI-LS: Basic Cube Analysis using SOSPEX [pdf]
Basic spectroscopic cube analysis using the SOFIA python tool SPecturm Explorer (SOSPEX), which displays FIFI-LS and GREAT spectral cubes and allows the user to perform a number of basic analysis routines on them. The cube is shown as a 2D image (spatial image obtained as average along the wavelength dimension) and as a spectrum (sum of spatial pixels of the original cube).

GREAT: How to View GREAT Spectra Using CLASS Utility [pdf]
Finding a sample data set through modifying the baseline fit, averaging, and saving the result in a Flexible Image Transport System (FITS) file using the Continuum and Line Analysis Single-dish Software (CLASS) utility, the standard for single-dish heterodyne spectroscopy data reduction.

Data Handbooks

The Guest Observer (GO) Data Handbooks describe data products, processing steps, calibration procedures, and known issues.

EXES [pdf]
FIFI-LS [pdf]
HAWC+ [pdf]

Data Tools

Data Archive
The SOFIA Science Center provides raw and calibrated data for all instruments via the Data Cycle System (DCS) Science Archive.

Data Cycle System (DCS)
SOFIA proposals and observation data are managed by the SOFIA Data Cycle System (DCS). The DCS is designed primarily to support Science and Mission Operations activities associated with Guest Observer (GO) programs for the observatory.

Atmospheric Transmission (ATRAN)
The atmospheric transmission as a function of wavelength may be obtained using the on-line Atmospheric Transmission tool (ATRAN) developed and provided to the SOFIA program by Steve Lord. The use of ATRAN is necessary for planning SOFIA high-resolution spectroscopic observations.

Target Visibility Tool
The target visibility for SOFIA can be determined using the Visibility Tool (VT), which is now available for download. (The web version is not supported.) Note that the use of VT is not a requirement, since detailed flight planning is done by the SMO staff. VT is also now an integrated feature of USPOT.

The SOSPEX tool, written by Dario Fadda and Ed Chambers, allows users to explore the final data cubes produced by the data reduction pipeline. An overview of its use can be found on the AAS poster. (See also

The FLUXER tool, written by Christof Iserlohe, allows users to fit the continuum and estimate line strengths in the final FIFI-LS data cubes.

Coming Soon
An additional tool, written by Christof Iserlohe and Bill Vacca, to determine line strengths after accounting for telluric absorption, will be posted shortly.

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