accsize -- Size of the data in bytes b_v_hes -- Approximate B-V colour derived from the half power points 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 half power points and calibrated against stellar samples with known multiband photometry. For details see Christlieb et al. (2001, 2001A&A...366..898C). x_hpp1 -- Spectral half power (or bisecting) point 1, measured in the HES objective-prism spectra in the wavelength region 320.0-484.0nm (2000A&A...358...77W). x_hpp2 -- Spectral half power (or bisecting) point 2, measured in the HES objective-prism spectra in the wavelength region 395.0-540.0nm (2000A&A...358...77W). x_hpp3 -- Spectral half power (or bisecting) point 3, measured in the HES objective-prism spectra in the wavelength region 352.0-505.0nm (2000A&A...358...77W). x_qd -- Quartile distance; i.e., the distance between the points separating the first and the last 25% of the flux, as measured in the (not flux-calibrated) HES spectra (2000A&A...358...77W).
![[Operator logo]](/static/img/logo_medium.png){kind=logo}