SMC H-Alpha Emission Stars and Nebulae Catalog from 1997 CTIO Survey
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Description
1898 H-alpha emission-line stars and small nebulae in the Small Magellanic Cloud were discovered in an objective-prism survey using the 0.90m Curtis Schmidt telescope at Cerro Tololo Inter-American Observatory. The catalog, created by NASA HEASARC in November 1997, includes newly identified planetary nebulae, compact H II regions, and late-type stars. It provides continuum intensities, H-alpha emission line shapes and strengths, coordinates, and cross-identifications for the listed objects.
Use Cases
Identify and classify planetary nebulae and compact H II regions based on provided H-alpha emission line characteristics.
Study the distribution and properties of emission-line stars in the Small Magellanic Cloud using the coordinate data.
Cross-reference newly discovered objects with other astronomical catalogs using the provided identifications.
Strengths
Contains 1898 emission-line objects, almost quadrupling previous discoveries in the region.
Includes specific measurements such as continuum intensities and H-alpha emission line shapes and strengths.
Originates from a defined survey using the 0.90m Curtis Schmidt telescope at CTIO.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Last updated 2026-03-13 18:30:31.918243; freshness should be verified.
Row count is unknown, which may limit suitability assessment.
Provenance
Source
NASA HEASARC, based on the ADC/CDS catalog J/A+AS/102/451 by Meyssonnier and Azzopardi.
Collection Method
Objective-prism survey performed through an H-alpha + [N II] interference filter.
Time Range
Survey date not specified; catalog version created in November 1997.
Freshness
Catalog version created in November 1997; last metadata update recorded as 2026-03-13.
Geography
Small Magellanic Cloud (SMC).
License is listed as 'other-license-specified'; terms should be reviewed before use. File formats include BIN and HTML.