Table · dataset · 2026
EXOSAT/CMA Sources (Screened for Quality)
Listed in IVOA Registry (Virtual Observatory)
This database table contains the results of the sources detected from the two EXOSAT LE telescopes.
Description
Each telescope had a channel multiplier array, CMA, detector in the focal plane. The CMA/telescope combination covered the 0.05-2.0 keV energy range with a field of view of 2 degrees and an on-axis angular resolution of 20 arcseconds (HEW).
The detectors had no intrinsic spectral capabilities; however, different filters were used to make broad band measurements. The most commonly used were thin Lexan (no. 7), Aluminum-Parylene (no. 6) and Boron (no. 8). An image was generated for each observation using a particular filter.
Read the rest (4 more)
A detection program was used to generate one database entry per source detected above a particular threshold. This catalog contains the list of detected sources, details about those detections, plus the names of the files containing the associated image and lightcurves. Since many objects were observed many times, there are multiple entries per object.
The list of detections in this database table has been screened for quality. Only sources with qflag_le >= 3 are present. Please refer to the <a href="/W3Browse/exosat/cma.html">CMA</a> database table for the complete, unscreened list of detections.
This database table was created by the HEASARC in August 2020, and it is based on a table created by the HEASARC in 1995 or earlier. The original CMA database table was created at the EXOSAT observatory during the post-operation phase (1986-1990) as part of the pipeline processing. These CMA results are part of the HEASARC data holdings from the start of the HEASARC.
This is a service provided by NASA HEASARC .
Links
Where it is published
- Reference page heasarc.gsfc.nasa.gov/W3Browse/all/cmascreen.html ↗
landing page · from IVOA Registry
Catalogue records · 2
- VOResource record dc.g-vo.org/oai.xml?verb=GetRecord&metadataPrefix=ivo_vor&identifier=ivo%3… ↗
metadata API · from IVOA Registry
- Registry record (GAVO) dc.g-vo.org/I/nasa.heasarc/cmascreen ↗
catalogue entry · from IVOA Registry
Topics
- Stated by source
- X-Ray
- From keywords
- Astronomy & Astrophysics
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| IVOA Registry (Virtual Observatory) | ivo://nasa.heasarc/cmascreen | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[field].local:field:astronomy | mapping · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].ivoa_waveband:x-ray | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[modality].local:modality:tabular | enrichment · IVOA Registry | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_description |
| publication_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 | |
| title | source · IVOA Registry | connector:ivoa_registry@1.0.0 | rr.resource.res_title |
| updated_date | source · IVOA Registry | connector:ivoa_registry@1.0.0 |