SHELA Epoch 1: Infrared Galaxy Catalog from Spitzer Space Telescope

The SHELA survey provides infrared source catalogs covering approximately 24 square degrees at 3.6 and 4.5 microns. Data was collected by the Spitzer Space Telescope and is managed by the National Aeronautics and Space Administration, with metadata last updated in March 2026. The catalogs are 80% complete to a limiting magnitude of 22.0 AB mag and reach a sensitivity of 1.1 microJansky.

Use Cases

• Identify and catalog infrared galaxies based on 3.6 and 4.5 micron flux measurements.
• Cross-match sources with optical data from the Sloan Digital Sky Survey Stripe 82 region.
• Study galaxy populations and large-scale structure in a well-surveyed multi-wavelength field.
• Perform photometric analysis using the provided completeness and sensitivity limits.

Strengths

• Covers a large area of approximately 24 square degrees.
• Provides specific completeness metrics: 80% complete to 22.0 AB mag and 50% complete to 22.6 AB mag.
• Reaches a defined sensitivity limit of 1.1 microJansky at both infrared wavelengths.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is provided in a BIN format, which may require specialized tools for access and analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the Spitzer Space Telescope's IRAC instrument.

Time Range

Epoch 1 (specific observation dates not provided in input).

Freshness

Last updated 2026-03-13 18:08:23.955256; freshness should be verified.

Geography

Sky region within the SDSS Stripe 82, HETDEX, and Dark Energy Survey footprints.