ASAS Photometry of ROSAT X-ray Sources: 2,302 Variable Stars
Updated 3mo ago
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Description
Photometric data from the All-Sky Automatic Survey (ASAS) - South was used to identify and analyze 6,028 bright stars near X-ray sources from the ROSAT All Sky Survey. The catalog, created by NASA HEASARC in May 2018, identifies 2,302 variable stars with periods from 0.137 to 193 days, including 1,233 newly discovered rotationally variable stars.
Use Cases
Classifying variable star types based on period and amplitude data mentioned in the description
Studying the correlation between stellar rotation (spots) and X-ray emission for coronal sources
Identifying and characterizing eclipsing binary systems from the listed categories
Analyzing the amplitude distribution of variable stars, including extreme cases like ASAS 063656-0521.0
Strengths
Contains 2,302 identified variable stars with measured periods
Includes 1,936 stars classified as rotationally variable, with 1,233 being new discoveries
Cross-references optical photometry with X-ray sources from the ROSAT Bright Source Catalog
Limitations
Column-level documentation is absent; field semantics must be inferred after download
Row count is unknown, which may limit suitability assessment
Data is limited to declination less than 29 degrees (Southern sky)
Provenance
Source
NASA HEASARC, based on CDS Catalog J/AcA/62/67
Collection Method
Photometric data analysis from the All-Sky Automatic Survey (ASAS) - South, cross-matched with ROSAT X-ray sources
Freshness
Last updated 2026-03-13 17:26:13.936342; freshness should be verified
Geography
Southern sky (Declination < 29 degrees)
License is listed as 'other-license-specified'; terms should be reviewed before use. File formats include BIN and HTML.