SDWFS: Spitzer Infrared Survey of the Boötes Field Across Four Epochs

The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey covering 10 square degrees in the Boötes field. It was conducted by NASA using the IRAC instrument on the Spitzer Space Telescope as a Cycle 4 Legacy project. The data consists of 20 band-matched catalogs reporting Vega magnitudes in four infrared bands, designed to characterize galaxy evolution beyond redshift 1.5.

Use Cases

• Selecting infrared-variable objects based on multi 3.6 micron epoch observations.
• Identifying high proper motion objects based on positional changes over years.
• Characterizing galaxy evolution beyond redshift 1.5 based on the survey's large volume and sensitivity.
• Analyzing photometric properties based on Vega magnitudes reported in four IRAC bands.

Strengths

• Covers a wide 10-square-degree field in the Boötes region.
• Provides data across four epochs, enabling time-domain analysis over years.
• Reports source coordinates aligned to 2MASS catalog positions within 0.2 arcsec.
• Includes photometry from three measurement apertures (4 arcsec, 6 arcsec, and Kron radius).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 18:02:19.644069; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Observations from the IRAC instrument on the Spitzer Space Telescope.

Time Range

Observations conducted across four epochs (specific dates not provided).

Freshness

Last updated 2026-03-13 18:02:19.644069.

Geography

The Boötes field in the sky.