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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.

Additionally, the following table will point you to the correct directories for directly downloading the latest tiled image data.

Image Products
Field NameIRACMIPSOpticalMini MosaicsTruecolor Previews
ELAIS-N1 dir dir dir file page
ELAIS-N2 dir dir dir file page
Lockman Hole dir dir dir file page
XMM-LSS dir dir notes file page
ELAIS-S1 dir dir notes file page
CDFS dir dir notes file page

Notes: XMM-LSS is part of the CFHT-Legacy Survey, and optical imaging data is available from them. Optical data for ELAIS-S1 and CDFS will be made available from SWIRE in our final data release.

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.
The following table will direct you to ASCII versions of these catalogs. It is highly recommended that you make use of the IRSA/Gator interface for searching these catalogs, as they become available.

Catalogs
Field Name Opt-IRAC-MIPS24 MIPS-Only
ELAIS-N1 dir dir
ELAIS-N2 dir dir
Lockman Hole dir dir
XMM-LSS dir dir
ELAIS-S1 dir dir
CDFS dir dir

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: 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

The next SWIRE data release will occur in early 2009. This is anticipated to include several new data products including: an asteroid catalog, a bandmerged IRAC-MIPS24/70/160 catalog, and a ``complete'' catalog of objects not included in the highly reliable bandmerged catalog.


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.

 
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by Dr. Carol Lonsdale and Dr. Russ Laher