ROSAT NEP Survey: 442 X-Ray Sources from Deep Sky Exposure

442 unique X-ray sources above a flux limit of ~2 x 10^-14 ergs cm^-2 s^-1 in the 0.5-2.0 keV band. This catalog presents X-ray properties, including positions, fluxes, hardness ratios, and angular sizes, from the deepest exposure region of the ROSAT All-Sky Survey. The table was created by NASA's HEASARC in February 2006 based on published astrophysical data.

Use Cases

• Statistical analysis of X-ray source populations based on the deep, contiguous sample.
• Cross-matching and identification of astronomical objects based on cataloged X-ray positions.
• Spectral analysis of X-ray sources based on provided hardness ratios.
• Studying source morphology based on recorded angular size information.

Strengths

• Contains 442 unique sources from a deep, large solid angle contiguous survey.
• Sources are identified above a specific, quantified flux limit (~2 x 10^-14 ergs cm^-2 s^-1).
• Includes multiple X-ray properties: positions, fluxes, hardness ratios, and angular sizes.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 18:32:34.024242; freshness should be verified.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC).

Collection Method

Compiled from the ROSAT All-Sky Survey (RASS) data.

Time Range

Observational data from the ROSAT mission period.

Freshness

Last updated 2026-03 -13 18:32:34.024242; data originates from 2006.

Geography

Sky region around the North Ecliptic Pole (80.6 square degrees).