Spitzer Extragalactic First Look Survey: WIYN/Hydra Line Strength Catalog

The Extragalactic First Look Survey comprises 4 square degrees of mid-infrared imaging from the Spitzer Space Telescope, observed for 67 hours in late 2003. This catalog presents line strength and equivalent width measurements from follow-up WIYN/Hydra optical spectra, as described in Marleau et al. (2007). The data was published by the National Aeronautics and Space Administration and last updated on the platform in March 2026.

Use Cases

• Classify extragalactic source populations based on mid-infrared imaging and optical spectroscopy.
• Analyze spectral line strengths and equivalent widths for galaxies observed in the survey.
• Characterize galaxy properties down to sub-millijansky flux levels in the infrared.
• Cross-reference Spitzer infrared data with ancillary ground-based optical and radio observations.

Strengths

• Data originates from a 67-hour Spitzer Space Telescope survey, a major infrared observatory.
• Covers 4 square degrees of sky with multi-wavelength ancillary data.
• Includes specific line strength and equivalent width measurements from optical spectra.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect temporal bias inherent to the 2003 observation period.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observational data from the Spitzer Space Telescope (MIPS, IRAC) and ground-based WIYN/Hydra optical telescope spectra.

Time Range

Observations made after Science Verification at the end of November 2003.

Freshness

Last updated 2026-03-13 17:44:26.713179; freshness should be verified.

Geography

Centered at celestial coordinates J1718+5930.