SDWFS: Spitzer Infrared Survey of the Boötes Field, 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 using the IRAC instrument on the Spitzer Space Telescope as a Cycle 4 Legacy project. The data, last updated in March 2026, is provided by the National Aeronautics and Space Administration.

Use Cases

• Selecting infrared-variable objects based on multi-epoch observations over years.
• Identifying high proper motion objects based on wide-field, time-series data.
• Characterizing galaxy evolution beyond redshift z ~ 1.5 based on the survey's large volume and sensitivity.
• Analyzing photometric properties of sources based on Vega magnitudes reported in four IRAC bands.

Strengths

• Covers a wide field of 10 square degrees, reducing the impact of cosmic variance for most systems.
• Provides four epochs of data, enabling time-domain analysis on timescales of years.
• Source coordinates are matched to the 2MASS catalog with a precision within 0.2 arcsec.
• Magnitudes are reported for four infrared bands (3.6, 4.5, 5.8, and 8 microns) using three measurement apertures.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific modeling tasks.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the IRAC instrument on the Spitzer Space Telescope.

Time Range

Observations conducted over four epochs.

Freshness

Last updated 2026-03 13 18:10:58.891106; freshness should be verified.

Geography

Covers 10 square degrees in the Boötes field of the NOAO Deep Wide-Field Survey.