ROSAT All-Sky Survey and SDSS Sample of X-Ray Emitting Stars

A 2009 catalog of 707 X-ray-emitting F, G, K, and M stars, created by NASA HEASARC. The dataset combines X-ray data from the ROSAT All-Sky Survey with optical data from the Sloan Digital Sky Survey (SDSS) and other catalogs to identify stellar counterparts. It includes derived distances and X-ray luminosities for the stars.

Use Cases

• Studying coronal X-ray emission from main-sequence stars based on the identified sample of F, G, K, and M stars.
• Analyzing the relationship between stellar type and X-ray luminosity based on derived L_X values.
• Identifying and characterizing rare objects like cataclysmic variables within X-ray survey data.
• Cross-matching multi-wavelength astronomical catalogs (X-ray, optical, infrared) for source identification.

Strengths

• Contains 707 identified stellar X-ray emitters, described as one of the largest X-ray-selected samples of such stars.
• Integrates data from multiple major surveys: ROSAT (X-ray), SDSS (optical), and 2MASS (infrared).
• Includes derived astrophysical parameters like distances and X-ray luminosities (L_X).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The sample is limited to bright stars unsuitable for SDSS spectroscopy, potentially introducing a selection bias.

Provenance

Source

NASA HEASARC, based on a reference paper from The Astrophysical Journal.

Collection Method

Cross-identification of ROSAT X-ray sources with SDSS optical data, supplemented by 2MASS and Apache Point Observatory spectroscopy.

Time Range

Based on ROSAT All-Sky Survey (1990s) and SDSS Data Release 1 (early 2000s).

Freshness

Last updated 2026-03-13 16:46:48.961265; freshness should be verified.

Geography

Full sky coverage from the ROSAT survey, limited to the SDSS Data Release 1 footprint.