SWIRE: Spitzer Wide-Area Infrared Extragalactic Survey

The SWIRE Data Release 3 is now occurring.

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.
Pseudo-truecolor images made from the IRAC 3.6, 4.5, and 8 micron data.

The following table will direct you to the correct directories for accessing the latest data. Note that much of the data is also available from IRSA with a different, more graphical and searchable interface.

Image Products
Field Name	IRAC	MIPS	Optical	Truecolor Previews
ELAIS-N1	dir	dir	dir	page
ELAIS-N2	dir	dir	dir	page
Lockman Hole	dir	dir	dir	page
XMM-LSS	dir	dir	notes	page
ELAIS-S1	dir	dir	notes	page
CDFS	dir	dir	notes	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 the upcoming month.

Catalogs

There are four primary SWIRE catalogs 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

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 summer of 2006. This is anticipated to include several new data products including: an asteroid catalog, deeper source extractions, a bandmerged IRAC-MIPS24/70/160 catalog, and a ``reject'' 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.