ESPaDOnS

E435729

astronomical instrument high-resolution optical spectropolarimeter

ESPaDOnS is a high-resolution optical spectropolarimeter used for detailed studies of stellar magnetic fields and related astrophysical phenomena.

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All labels observed (4)

Label	Occurrences
ESPaDOnS canonical	2
ESPaDOnS CCD detector	1
ESPaDOnS spectropolarimeter	1
NARVAL spectropolarimeter at TBL Pic du Midi	1

How this entity was disambiguated

This entity first appeared as the object of triple T4378606 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: ESPaDOnS
Context triple: [Canada–France–Hawaii Telescope, hasInstrument, ESPaDOnS]

A. HARPS spectrograph
The HARPS spectrograph is a high-precision, fiber-fed echelle spectrograph designed primarily for detecting exoplanets via radial velocity measurements.
B. X-shooter
X-shooter is a high-efficiency, medium-resolution spectrograph on the Very Large Telescope that simultaneously covers a very wide wavelength range from the ultraviolet to the near-infrared.
C. FEROS spectrograph
The FEROS spectrograph is a high-resolution, fiber-fed echelle spectrograph used in optical astronomy for precise stellar spectroscopy and radial velocity measurements.
D. Magellan Echellette Spectrograph (MagE)
Magellan Echellette Spectrograph (MagE) is a medium-resolution optical echellette spectrograph designed for wide wavelength coverage and efficient spectroscopy of faint astronomical sources.
E. GNIRS (Gemini Near-Infrared Spectrograph)
GNIRS (Gemini Near-Infrared Spectrograph) is a high-resolution near-infrared spectrograph used on the Gemini North telescope to study the composition, kinematics, and physical conditions of astronomical objects.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: ESPaDOnS
Target entity description: ESPaDOnS is a high-resolution optical spectropolarimeter used for detailed studies of stellar magnetic fields and related astrophysical phenomena.

A. HARPS spectrograph
The HARPS spectrograph is a high-precision, fiber-fed echelle spectrograph designed primarily for detecting exoplanets via radial velocity measurements.
B. X-shooter
X-shooter is a high-efficiency, medium-resolution spectrograph on the Very Large Telescope that simultaneously covers a very wide wavelength range from the ultraviolet to the near-infrared.
C. FEROS spectrograph
The FEROS spectrograph is a high-resolution, fiber-fed echelle spectrograph used in optical astronomy for precise stellar spectroscopy and radial velocity measurements.
D. Magellan Echellette Spectrograph (MagE)
Magellan Echellette Spectrograph (MagE) is a medium-resolution optical echellette spectrograph designed for wide wavelength coverage and efficient spectroscopy of faint astronomical sources.
E. GNIRS (Gemini Near-Infrared Spectrograph)
GNIRS (Gemini Near-Infrared Spectrograph) is a high-resolution near-infrared spectrograph used on the Gemini North telescope to study the composition, kinematics, and physical conditions of astronomical objects.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	astronomical instrument ⓘ high-resolution optical spectropolarimeter ⓘ
acronymFor	Echelle SpectroPolarimetric Device for the Observation of Stars ⓘ
associatedSurvey	BinaMIcS ⓘ CFHT Large Programs on stellar magnetism ⓘ Magnetism in Massive Stars (MiMeS) ⓘ Toupies ⓘ
commissioned	mid-2000s ⓘ
dataPipeline	Libre-ESpRIT ⓘ UPENA ⓘ
fullName	Echelle SpectroPolarimetric Device for the Observation of Stars ⓘ
hasMode	object-only mode ⓘ polarimetric mode ⓘ spectropolarimetry mode ⓘ spectroscopy mode ⓘ star+sky mode ⓘ
installedOn	Canada-France-Hawaii Telescope 3.6 m telescope ⓘ linked to: Canada–France–Hawaii Telescope
locatedAt	Canada-France-Hawaii Telescope ⓘ linked to: Canada–France–Hawaii Telescope
locatedIn	Hawaii ⓘ United States ⓘ linked to: United States of America
locatedOn	Maunakea ⓘ linked to: Mauna Kea
measures	Stokes I ⓘ Stokes Q ⓘ Stokes U ⓘ Stokes V ⓘ
observes	exoplanet host stars ⓘ massive stars ⓘ pre-main-sequence stars ⓘ solar-type stars ⓘ stars ⓘ stellar magnetic fields ⓘ white dwarfs ⓘ
operatedBy	Canada-France-Hawaii Telescope Corporation ⓘ linked to: Canada–France–Hawaii Telescope
primaryUse	high-resolution optical spectroscopy ⓘ stellar spectropolarimetry ⓘ study of stellar magnetic fields ⓘ
resolvingPower	up to about 65,000 ⓘ
scienceGoal	characterizing magnetic activity cycles ⓘ mapping stellar magnetic field topologies ⓘ measuring Zeeman effect in stellar spectra ⓘ studying magnetospheric accretion in young stars ⓘ supporting exoplanet searches via radial velocities ⓘ
similarTo	NARVAL spectropolarimeter at TBL Pic du Midi ⓘ linked to: ESPaDOnS
spectralCoverage	approximately 370 nm to 1050 nm ⓘ
spectralRange	optical ⓘ
uses	cross-dispersed echelle spectrograph ⓘ fiber-fed design ⓘ polarimetric module at Cassegrain focus ⓘ