All SWIRE Spitzer image data is now released.

This data release adds the final remaining fields (ES1 and CDFS) to Data Release 2, and additionally adds the data formerly embargoed by the GTO program in the Lockman Hole. Otherwise it is supplemental to DR2. No changes were made to the EN1, EN2 and XMM data. As of now, all Spitzer data from SWIRE is available.

Images

SWIRE imaging products consist of several parts:

• Coadded mosaic images, one per each of the four IRAC bands (3.6, 4.5, 5.8, and 8 microns). The data are supplied for convenience in the form of ``tiles'' of roughly one degreee in size. There are also associated coverage, mask, and uncertainty images for the Spitzer data.
• Three coadded, mosaiced images, one for each of the MIPS bands (24, 70, and 160 microns). These are supplied as one image for the entire field.
• Optical images in five optical bands (UgriZ) where available. These data are tiled like the IRAC data.
• Mini-mosaic images (binned coadds of the data) useful for understanding the data coverage. See the readme.
• Pseudo-truecolor images made from the IRAC 3.6, 4.5, and 8 micron data.

The images are available from IRSA with a graphical and searchable interface. We also highly recommend using the IRSA image cutout service, which will allow you to upload coordinate tables and receive small image cutouts at every wavelength for each target.

The following table contains shortcuts to the IRSA image server. You should probably use the ATLAS links, since these are the least likely to break due to aging of the web structure.

Notes: XMM-LSS is part of the CFHT-Legacy Survey, and optical imaging data is available from them. Optical data for ELAIS-S1 is not currently available.

Catalogs

There are seperate catalogs for each SWIRE field, and four primary catalog types at this time.

• A bandmerged catalog consisting of optical, IRAC, and MIPS-24 fluxes, associated with each other. This catalog has extremely high C&R (described in the data paper mentioned below). This catalog requires detections at 3.6 and 4.5 microns above specific SNR thresholds.
• Three separate catalogs for 24, 70 and 160 microns. These catalogs are single-band only and are cut based only on the MIPS waveband in question.

Additional Ancillary Data

• SWIRE/Chandra Survey - source lists for a moderate depth (70 ksec) contiguous 0.6 square degree survey in the Lockman Hole, coincident with an existing ultradeep VLA survey, as described by Wilkes et al. 2009, ApJ, submitted, ``The SWIRE/Chandra Survey: The X-ray Sources''. Three ascii, space-delimited tables are downloadable as a tarball: source positions and counts, hardness ratios, and SWIRE multiwavelength cross-references.

Documentation

The primary document is the data release paper for DR2, which will soon be updated to include the last two fields of DR3.

There are also data release notes for DR2/3. These notes contain late-breaking information not included in the explanatory supplement, and are required reading.

Future Data Releases

It is unlikely (as of 2017) that any more data products will be formerly released. If you want to work with SWRE data and suspect we may have a data product you want but have not released, please contact us.

Note: The SWIRE Data Release 1 (Fall 2004) is now deprecated. Users should use Data Release 2/3, which includes a rerelease of all version 1 data. The Data Release 1 notes are found on the following web pages and contained important information, in particular in regards to known systematic errors in this catalog release.