Hamburg/ESO Survey Browser Service

Metadata

Identifier

ivo://org.gavo.dc/hamburg_eso/q/web

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Description

The Hamburg/ESO survey (HES) is a digital objective prism survey covering the total southern extragalactic sky. It is based on Kodak IIIa-J plates which have been taken with the 1m ESO Schmidt telescope and its 4° prism. The spectral coverage is 3200-5300 Å, at an resolution of 15 Å at H gamma. The magnitude range covered is roughly between 18.5 and 11 mag in B_J.

This is a collection of uniformly reduced spectra prepared by Norbert Christlieb. It is also intended as a sort-of resolver for HES names (“identifiers“) like ”HE 2301-7732”; unfortunately, these identifiers are not unique. You will need to apply domain knowledge in order to find the object actually being referred to when resolving an identifier of this sort.

Keywords

Creator

Reimers, D.
Wisotzki, L
Christlieb, N.

Created

2025-11-19T10:27:26Z

Data updated

2026-03-09T14:45:02Z

Metadata updated

2026-03-11T12:41:28Z

Source

A&A...358...77W

Reference URL

Service info

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Hamburg/ESO Survey Browser Service

	accsize -- Size of the data in bytes
	b_v_hes -- Approximate B-V colour derived from the spectrum and calibrated against stellar samples with known multiband photometry. For details see Christlieb et al. (2001, 2001A&A...366..898C).
	balmsum -- Sum of equivalent widths of Hbeta, Hgamma and Hdelta, measured in the HES spectrum by means of fits of Gaussians to these lines.
	c2idx1 -- Band index for the C2 feature at 5165Á measured in the HES spectrum (for details, see Christlieb et al. 2001, 2001A&A...375..366C).
	c2idx2 -- Band index for the C2 feature at 4737Á measured in the HES spectrum (for details, see Christlieb et al. 2001, 2001A&A...375..366C).
	cnidx1 -- Band index for the CN feature at 4216Á measured in the HES spectrum (for details, see Christlieb et al. 2001, 2001A&A...375..366C).
	cnidx3 -- Band index for the CN feature at 3883Á measured in the HES spectrum (for details, see Christlieb et al. 2001, 2001A&A...375..366C).
	dec -- Declination for equinox J2000. The coordinates were derived from the DSS-I, and they are typically accurate to within 1 arcsec (rms).
	embargo -- Date the data will become/became public
	field -- Field number in the ESO/SRC (or ESO/SERC) sky atlas.
	gphes -- Line index for the G band of CH measured in the HES spectrum (for details, see Christlieb et al. 2008, 2008A&A...484..721C).
	hes_id -- Alternative, more precise HES identifier consisting of the first seven digits of the right ascension at equinox 2000.0, the first six digits of the declination at equinox 2000.0, the plate quarter (a, b, c, or d), and the HES plate number. Example: For HE 0107−5240, which is located on quarter c of plate 2052 and at coordinates α = 01h09m29s.1, δ = −52◦24'34'', the HESid is HE0109291m522434c2052.
	kphes -- Line index for the Ca II K line measured in the HES spectrum (for details, see Christlieb et al. 2008, 2008A&A...484..721C).
	mag_b_hes -- Approximate photographic magnitude in the Johnson B band derived by combining the B_J magnitude and the B-V colour.
	mime -- MIME type of the file served
	owner -- Owner of the data
	plate -- Plate number of the HES objective prism plate in the ESO archive.
	quadrant -- HES plate quadrant (i.e., a, b, c, or d).
	ra -- Right ascension for equinox J2000. The coordinates were derived from the DSS-I, and they are typically accurate to within 1 arcsec (rms).
	ssa_aperture -- Angular diameter of aperture
	ssa_bandpass -- Bandpass (i.e., rough spectral location) of this dataset; this should be the most appropriate term from the vocabulary http://www.ivoa.net/rdf/messenger.
	ssa_binSize -- Bin size in wavelength
	ssa_cdate -- Processing/Creation date
	ssa_collection -- A short handle naming the collection this spectrum belongs to.
	ssa_creationtype -- Process used to produce the data (archival, cutout, filtered, mosaic, projection, spectralExtraction, or catalogExtraction)
	ssa_creator -- Creator of the datasets included here.
	ssa_creatorDID -- Dataset identifier assigned by the creator
	ssa_csysName -- System RA and Dec are given in
	ssa_cversion -- Creator assigned version for this dataset (will be incremented when this particular item is changed).
	ssa_datasource -- Method of generation for the data (one of survey, pointed, theory, custom, artificial).
	ssa_dateObs -- Midpoint of exposure (MJD)
	ssa_dstitle -- A compact and descriptive designation of the dataset.
	ssa_dstype -- Type of data (spectrum, time series, etc)
	ssa_fluxSI -- Flux/magnitude conversion factor in Osuna-Salgado convention
	ssa_fluxStatError -- Statistical error in flux
	ssa_fluxSysError -- Systematic error in flux
	ssa_fluxcalib -- Type of flux calibration (ABSOLUTE, CALIBRATED, RELATIVE, NORMALIZED, or UNCALIBRATED).
	ssa_fluxucd -- UCD of the flux column
	ssa_fluxunit -- Unit of the flux column
	ssa_instrument -- Instrument or code used to produce these datasets
	ssa_length -- Number of points in the spectrum
	ssa_location -- ICRS location of aperture center
	ssa_model -- Data model name and version
	ssa_pdate -- Date last published.
	ssa_pubDID -- Dataset identifier assigned by the publisher
	ssa_publisher -- Publisher of the datasets included here.
	ssa_redshift -- Redshift of target object
	ssa_reference -- URL or bibcode of a publication describing this data.
	ssa_region -- Rough coverage based on location and aperture.
	ssa_snr -- Signal-to-noise ratio estimated for this dataset
	ssa_spaceCalib -- Type of calibration in spatial coordinates
	ssa_spaceError -- Statistical error in position
	ssa_spaceRes -- Spatial resolution of data
	ssa_speccalib -- Type of wavelength calibration
	ssa_specend -- Upper value of spectral coordinate
	ssa_specext -- Width of the spectrum
	ssa_specmid -- Midpoint of region covered in this dataset
	ssa_specres -- Resolution (in meters of wavelength) on the spectral axis
	ssa_specstart -- Lower value of spectral coordinate
	ssa_spectStatError -- Statistical error in wavelength
	ssa_spectSysError -- Systematic error in wavelength
	ssa_spectralSI -- Spectral conversion factor in Osuna-Salgado convention
	ssa_spectralucd -- UCD of the spectral column in the spectra served; when you have wavelengths, use em.wl for vacuum wavelengths, em.wl;obs.atmos for air wavelengths.
	ssa_spectralunit -- Unit of the spectral column
	ssa_targclass -- Object class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible)
	ssa_targetpos -- Equatorial (ICRS) position of the target object.
	ssa_targname -- Common name of object observed.
	ssa_timeExt -- Exposure duration
	ssa_timeSI -- Time conversion factor in Osuna-Salgado convention.
	u_b_hes -- Approximate U-B colour derived from the spectrum and calibrated against stellar samples with known multiband photometry. For details see Christlieb et al. (2001, 2001A&A...366..898C).