COSMOS2015: Photometric Redshifts and Stellar Masses for 500k+ Objects

The COSMOS2015 catalogue contains precise photometric red-shifts and stellar masses for more than half a million objects over the 2 deg^2 COSMOS field. It includes YJHKs images from the UltraVISTA-DR2 survey, Y-band from Subaru/Hyper-Suprime-Cam and infrared data from the SPLASH Spitzer Legacy program. This near-infrared selected catalogue is provided by the National Aeronautics and Space Administration and was last updated in March 2026.

Use Cases

• Modeling galaxy evolution based on photometric redshift and stellar mass data.
• Analyzing galaxy environments in the early Universe based on the near-infrared selected catalogue.
• Training machine learning models for redshift estimation using the multi-wavelength photometric data.
• Conducting statistical studies of galaxy populations over the 2 square degree COSMOS field.

Strengths

• Contains data for more than half a million objects, providing a large sample for analysis.
• Covers the 2 deg^2 COSMOS field, offering a substantial contiguous area for study.
• Integrates data from multiple surveys including UltraVISTA-DR2, Subaru/HSC, and SPLASH Spitzer.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• File formats are BIN and PDF, which may require specialized tools for access and analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Compiled from the UltraVISTA-DR2 survey, Subaru/Hyper-Suprime-Cam, and SPLASH Spitzer Legacy program.

Time Range

Likely covers observations from the contributing survey periods, but specific range is not stated.

Freshness

Last updated 2026-03-13 17:34:44.724236; freshness should be verified.

Geography

Covers the 2 deg^2 COSMOS field on the celestial sphere.