ROSAT 13-hour Field: XMM-Newton X-Ray Source Catalog with 225 Sources

225 X-ray sources were detected in a deep survey covering 0.18 square degrees centered on the ROSAT 13-hour field. The catalog was created by NASA HEASARC in August 2007 based on XMM-Newton observations from June 2001, with a useful exposure time of approximately 120 ks after filtering for high background. Source positions are accurate to 2 arcseconds for 68% of sources within the central 9 arcminutes, facilitating optical follow-up.

Use Cases

• Analyzing the logN-logS (source count) relation based on the flux measurements in four energy bands (0.2-0.5, 0.5-2, 2-5, 5-10 keV).
• Studying the spatial distribution and properties of faint X-ray sources based on the catalog of 225 objects.
• Planning optical follow-up observations based on the high positional accuracy (2 arcseconds for many sources).
• Investigating the effects of particle background flares on X-ray observations based on the described data filtering process.

Strengths

• Contains 225 sources from a deep, targeted survey.
• High positional accuracy: 68% of sources within the central 9 arcminutes are accurate to 2 arcseconds.
• Provides source counts and flux analysis in four distinct energy bands.

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 specific 2001 observation period.

Provenance

Source

National Aeronautics and Space Administration (NASA HEASARC)

Collection Method

Observations from the XMM-Newton satellite, processed and filtered to remove high particle background periods.

Time Range

Observations conducted in June 2001.

Freshness

Last updated 2026-03-13 16:28:11.505292; freshness should be verified.

Geography

Centered on sky coordinates RA(J2000) = 13 34 37.1, Dec (J2000) = +37 53 02.2, covering 0.18 square degrees.