Chamaeleon I North Cloud: Chandra X-Ray Point Source Catalog

A 66.3 ksec Chandra X-Ray Observatory observation from 2001 July 2-3 provides a catalog of 107 X-ray point sources in the Chamaeleon I North cloud. The catalog, created by NASA HEASARC in 2007, includes 27 previously recognized pre-main-sequence cloud members and 3 PMS brown dwarfs. It achieved a limiting X-ray luminosity of log L_t ~ 10^27 ergs/s in a 0.8 x 0.8 pc^2 region.

Use Cases

• Studying magnetic activity in young stellar objects based on X-ray luminosity measurements.
• Census analysis of pre-main-sequence stars in a nearby young cluster based on the catalog of 27 identified members.
• Investigating the properties of protostellar brown dwarfs based on the inclusion of objects like ISO 192.
• Distinguishing between cluster members and background stars based on follow-up optical photometry and spectroscopy mentioned in the description.

Strengths

• High sensitivity with a limiting X-ray luminosity of log L_t ~ 10^27 ergs/s.
• Contains 107 X-ray sources, with 27 identified as pre-main-sequence cloud members.
• Includes 3 pre-main-sequence brown dwarfs, offering data on these low-mass objects.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from a single observation in 2001; temporal coverage is limited.

Provenance

Source

NASA HEASARC, based on CDS catalog J/ApJ/614/267.

Collection Method

Observation with the Advanced CCD Imaging Spectrometer (ACIS-I) detector on board the Chandra X-Ray Observatory.

Time Range

Observation date: 2001 July 2.25-3.04 UT.

Freshness

Last updated 2026-03-13 17:19:55.376020; freshness should be verified.

Geography

Chamaeleon I North cloud, centered at J2000.0 RA 11 10 00.0, Declination -76 35 00.