SHELA Epoch 3 IRAC Catalog: Infrared Source Catalog for 24 Square Degrees

The Spitzer/HETDEX Exploratory Large-Area (SHELA) survey covers approximately 24 square degrees of sky at 3.6 and 4.5 microns. The catalog is 80% complete to a limiting magnitude of 22.0 AB mag and reaches a sensitivity of 1.1 microJy, produced by NASA. The data was last updated in March 2026.

Use Cases

• Identify and catalog infrared galaxies based on 3.6 and 4.5 micron flux measurements.
• Cross-match sources with optical surveys like Sloan Digital Sky Survey Stripe 82 for multi-wavelength analysis.
• Study galaxy populations and large-scale structure in a well-surveyed region overlapping with HETDEX and DES.
• Perform photometric analysis using the weighted sum detection image mentioned in the description.

Strengths

• Covers a large area of approximately 24 square degrees.
• Provides 80% completeness to a specific limiting magnitude of 22.0 AB mag.
• Reaches a defined sensitivity limit of 1.1 microJy at both wavelengths.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is provided in a BIN format, which may require specialized tools for access.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the Spitzer Space Telescope's IRAC instrument.

Time Range

Epoch 3, specific observation dates not provided.

Freshness

Last updated 2026-03-13 19:49:16.336991; freshness should be verified.

Geography

Sky region within the Sloan Digital Sky Survey 'Stripe 82', HETDEX, and Dark Energy Survey footprints.