Chandra Deep Field North: 1-Megasecond X-Ray Source Catalog

370 distinct X-ray point sources detected in an extremely deep 1-megasecond survey of the Hubble Deep Field North region, performed by the Chandra X-Ray Observatory. The catalog, created by NASA HEASARC in March 2002, lists sources across four energy bands with precise positional accuracy. It reaches flux limits of approximately 3e-17 ergs cm-2 s-1 in the soft band and 2e-16 ergs cm-2 s-1 in the hard band.

Use Cases

• Analyze the spatial distribution of X-ray sources based on the reported source densities of 7100 and 4200 deg-2 in soft and hard bands.
• Study the spectral properties of celestial objects based on source counts across the full, soft, hard, and ultrahard energy bands.
• Cross-match X-ray sources with optical counterparts from the Hubble Deep Field North using the reported positional accuracy of 0.6-1.7 arcseconds.

Strengths

• One of the two deepest X-ray surveys ever performed, with a 1-megasecond exposure.
• Contains 370 distinct point sources detected across multiple energy bands, with 360 in the full 0.5-8.0 keV band.
• Provides high positional accuracy for source matching, within 0.6 to 1.7 arcseconds at 90% confidence.

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 observational bias inherent to the specific deep-field survey area.

Provenance

Source

NASA HEASARC, based on Table 3 of Brandt et al. (2001) from the Astronomical Journal.

Collection Method

Observational data from the Advanced CCD Imaging Spectrometer on the Chandra X-Ray Observatory.

Freshness

Last updated 2026-03-13 19:30:10.777173; freshness should be verified.

Geography

Hubble Deep Field North and its environs (~450 square arcminutes).