M 67 Chandra X-Ray Catalog: 158 Sources in an Old Open Cluster

158 X-ray sources were detected in a 47 ks Chandra/ACIS observation of the 4 Gyr old open cluster M67. The catalog includes 25 proper-motion cluster members and about 100 background sources, with X-ray properties and ROSAT/optical counterpart information. This table was created by the NASA HEASARC in January 2007 based on data from the CDS.

Use Cases

• Identify and analyze X-ray emitting binary star systems based on the 23 detected binary members.
• Study the X-ray properties of background galactic or extragalactic sources based on the approximately 100 detected background objects.
• Cross-match X-ray sources with optical and previous ROSAT observations based on the listed counterpart information.
• Investigate stellar activity and evolution in an old open cluster based on the data from the 4 Gyr old M67 cluster.

Strengths

• Contains data for 158 distinct X-ray sources from a dedicated 47 ks Chandra observation.
• Includes cross-matched data from ROSAT and optical surveys, providing multi-wavelength context.
• Identifies 25 proper-motion cluster members and 23 binary systems within the cluster.

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 17 37 07 309248; freshness should be verified.

Provenance

Source

NASA HEASARC, based on data from the Centre de Données astronomiques de Strasbourg (CDS).

Collection Method

Results from a 47 ks observation with the Chandra X-ray Observatory's ACIS instrument.

Time Range

Observation date not specified; catalog publication date is 2007.

Freshness

Catalog created in January 2007; last metadata update recorded as 2026-03-13.

Geography

Data covers the celestial region of the open star cluster M67 (NGC 2682).