Rho Ophiuchi Star-Forming Region: Chandra X-Ray Point Source Catalog

NASA HEASARC provides a catalog of 195 X-ray sources from two deep Chandra observations of the Rho Ophiuchi star-forming cloud. The data includes 71 detected flares from pre-main sequence stars and young brown dwarfs, with 306 total entries due to separate analyses for quiescent and flaring states. This table was created in February 2007 based on CDS catalog files.

Use Cases

• Analyze X-ray flare properties and frequency based on the 71 detected flares from young stellar objects.
• Study spectral characteristics of pre-main sequence stars and brown dwarfs based on the results of spectral and timing analyses.
• Compare quiescent and flaring emission states for sources which flared, as the catalog contains multiple entries per flaring source.
• Investigate source detection across overlapping observation fields based on the 9 sources listed twice from two Chandra pointings.

Strengths

• Contains data from two deep exposure Chandra observations, providing systematic study of the region.
• Includes 195 distinct X-ray sources with detailed spectral and timing analysis results.
• Catalog identifies 71 X-ray flares, enabling study of transient activity in young stellar objects.

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 19:20:08.605751; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS Catalog J/PASJ/55/653.

Collection Method

Analysis of two deep exposure Chandra ACIS-I array observations of the Rho Ophiuchi cloud.

Time Range

Observations referenced are from 2002 (Chandra) and earlier studies (1990). Catalog created February 2007.

Freshness

Last updated 2026-03-13 19:20:08.605751

Geography

Central region of the Rho Ophiuchi star-forming cloud, covering specific cores (A, B, C, E, F).