Einstein Observatory Catalog of 720 X-Ray Galaxy Observations
Updated 3mo ago
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Description
A catalog of 720 X-ray observations for 493 galaxies, including 238 detections and 212 upper limits, from the Einstein Observatory's IPC and HRI instruments. The database was created by NASA's HEASARC in January 2002, incorporating data from pointed observations, serendipitous finds in the RSA and RC2 catalogs, and literature data for four nearby galaxies. It includes observations where galaxies were well-imaged within the field and cases where sources were at the edge or confused.
Use Cases
Analyze X-ray detection rates and upper limits for a sample of galaxies based on the 238 detections and 212 upper limits mentioned.
Study the X-ray properties of galaxies from the Revised Shapley-Ames and RC2 catalogs that were serendipitously observed.
Compare pointed observations with serendipitous detections of galaxies within Einstein Observatory fields.
Investigate specific nearby galaxies like M 31 and M 32 using the X-ray data compiled from the literature.
Strengths
Contains 720 total entries covering 493 distinct galaxies.
Provides 238 X-ray detections and 212 3-sigma upper limits for well-imaged galaxies.
Incorporates data from multiple sources: pointed observations, serendipitous finds in major catalogs, and literature.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Row count is unknown, which may limit suitability assessment.
Some observations are noted as being at the edge of the field or confused with other sources, which may affect data quality.
Provenance
Source
NASA HEASARC, based on CDS Catalog J/ApJS/80/531.
Collection Method
Compilation of observations from the Einstein Observatory's IPC and HRI instruments and literature data.
Time Range
Observations from the Einstein Observatory mission period.
Freshness
Last updated 2026-03-13 18:22:42.143661; freshness should be verified.
Geography
Observations of galaxies across the sky, including specific nearby galaxies (LMC, SMC, M 31, M 32).
License is listed as 'other-license-specified'; terms should be reviewed. File formats include BIN and HTML.