tco_hot_supergiaivo://fai.kz/tco_hot_supergiants/q/raw_dataFesenkov Astrophysical InstituteDanford, S.Miroshnichenko, A.2026-06-19T07:52:07ZFAI NVO Team

Observatory 23, 050020 Almaty, Kazakhstan

vo@fai.kzstellar-spectroscopysupergiant-starsechelle-spectroscopyhot-stars Spectral Archive of Hot Galactic Supergiants (TCO Node) This resource provides a digital archive of one-dimensional (1D) optical spectra of hot galactic supergiants, obtained at the Three College Observatory (TCO). The archive is integrated into the Kazakhstan National Virtual Observatory (KazVO) data services and optimized for the IVOA Simple Spectral Access Protocol (SSAP). **Data Specification:** * Data Type: Medium-resolution optical echelle spectra. * File Format: FITS (Flexible Image Transport System). * Data Representation: 1D merged (stitched) spectra. * Flux Calibration: Relative intensity, normalized to the continuum. **Observational Setup and Instrumentation:** * Observatory: Three College Observatory (TCO), North Carolina, USA * Telescope: 0.81-m Ritchey-Chretien telescope * Instrument: Fiber-fed echelle spectrograph eShel * Spectrograph Manufacturer: Shelyak Instruments **Spectral Characteristics:** * Spectral Range: Approximately 3900 - 7800 Angstroms (precise wavelength boundaries are frame-dependent and fixed within individual FITS headers). * Spectral Resolution: R approx 12,000. * Wavelength Calibration: Executed using a Thorium-Argon (ThAr) reference lamp spectrum. **Data Reduction Pipeline:** Primary and scientific data reduction was performed within the IRAF (Image Reduction and Analysis Facility) environment using standard echelle spectroscopy packages. **Key Reduction Steps:** 1. Pre-processing: Bias frame subtraction. 2. Extraction: Localization and extraction of individual echelle orders. 3. Dispersion Relation: Wavelength calibration based on ThAr reference frames. 4. Order Merging: Stitching of discrete spectral orders into a continuous 1D array. 5. Kinematic Correction: Application of the heliocentric velocity correction (documented under the VHELIO FITS header keyword). 6. Continuum Normalization: Continuum flattening achieved via high-order polynomial fitting.https://dachs.fai.kz/tableinfo/tco_hot_supergiants.raw_dataArchiveResearchThree College ObservatoryeShel spectrographOpticaltco_hot_supergiants Spectral Archive of Hot Galactic Supergiants (TCO Node) This resource provides a digital archive of one-dimensional (1D) optical spectra of hot galactic supergiants, obtained at the Three College Observatory (TCO). The archive is integrated into the Kazakhstan National Virtual Observatory (KazVO) data services and optimized for the IVOA Simple Spectral Access Protocol (SSAP). **Data Specification:** * Data Type: Medium-resolution optical echelle spectra. * File Format: FITS (Flexible Image Transport System). * Data Representation: 1D merged (stitched) spectra. * Flux Calibration: Relative intensity, normalized to the continuum. **Observational Setup and Instrumentation:** * Observatory: Three College Observatory (TCO), North Carolina, USA * Telescope: 0.81-m Ritchey-Chretien telescope * Instrument: Fiber-fed echelle spectrograph eShel * Spectrograph Manufacturer: Shelyak Instruments **Spectral Characteristics:** * Spectral Range: Approximately 3900 - 7800 Angstroms (precise wavelength boundaries are frame-dependent and fixed within individual FITS headers). * Spectral Resolution: R approx 12,000. * Wavelength Calibration: Executed using a Thorium-Argon (ThAr) reference lamp spectrum. **Data Reduction Pipeline:** Primary and scientific data reduction was performed within the IRAF (Image Reduction and Analysis Facility) environment using standard echelle spectroscopy packages. **Key Reduction Steps:** 1. Pre-processing: Bias frame subtraction. 2. Extraction: Localization and extraction of individual echelle orders. 3. Dispersion Relation: Wavelength calibration based on ThAr reference frames. 4. Order Merging: Stitching of discrete spectral orders into a continuous 1D array. 5. Kinematic Correction: Application of the heliocentric velocity correction (documented under the VHELIO FITS header keyword). 6. Continuum Normalization: Continuum flattening achieved via high-order polynomial fitting.tco_hot_supergiants.raw_data Spectral Archive of Hot Galactic Supergiants (TCO Node) This resource provides a digital archive of one-dimensional (1D) optical spectra of hot galactic supergiants, obtained at the Three College Observatory (TCO). The archive is integrated into the Kazakhstan National Virtual Observatory (KazVO) data services and optimized for the IVOA Simple Spectral Access Protocol (SSAP). **Data Specification:** * Data Type: Medium-resolution optical echelle spectra. * File Format: FITS (Flexible Image Transport System). * Data Representation: 1D merged (stitched) spectra. * Flux Calibration: Relative intensity, normalized to the continuum. **Observational Setup and Instrumentation:** * Observatory: Three College Observatory (TCO), North Carolina, USA * Telescope: 0.81-m Ritchey-Chretien telescope * Instrument: Fiber-fed echelle spectrograph eShel * Spectrograph Manufacturer: Shelyak Instruments **Spectral Characteristics:** * Spectral Range: Approximately 3900 - 7800 Angstroms (precise wavelength boundaries are frame-dependent and fixed within individual FITS headers). * Spectral Resolution: R approx 12,000. * Wavelength Calibration: Executed using a Thorium-Argon (ThAr) reference lamp spectrum. **Data Reduction Pipeline:** Primary and scientific data reduction was performed within the IRAF (Image Reduction and Analysis Facility) environment using standard echelle spectroscopy packages. **Key Reduction Steps:** 1. Pre-processing: Bias frame subtraction. 2. Extraction: Localization and extraction of individual echelle orders. 3. Dispersion Relation: Wavelength calibration based on ThAr reference frames. 4. Order Merging: Stitching of discrete spectral orders into a continuous 1D array. 5. Kinematic Correction: Application of the heliocentric velocity correction (documented under the VHELIO FITS header keyword). 6. Continuum Normalization: Continuum flattening achieved via high-order polynomial fitting.1026ssa_dateobsMidpoint of exposure (MJD)dtime.epochssa:Char.TimeAxis.Coverage.Location.Valuedoublenullablessa_dstitleA compact and descriptive designation of the dataset.meta.title;meta.datasetssa:DataID.Titlecharssa_targnameCommon name of object observed.meta.id;srcssa:Target.Namecharssa_lengthNumber of points in the spectrumssa:Dataset.Lengthintnullablessa_specstartLower value of spectral coordinatemem.wl;stat.minssa:Char.SpectralAxis.Coverage.Bounds.Startfloatnullablessa_specendUpper value of spectral coordinatemem.wl;stat.maxssa:Char.SpectralAxis.Coverage.Bounds.Stopfloatnullablessa_specresResolution (in meters of wavelength) on the spectral axismspect.resolution;em.wlssa:Char.SpectralAxis.Resolutionfloatnullablessa_timeextExposure durationstime.durationssa:Char.TimeAxis.Coverage.Bounds.Extentfloatnullablessa_pubdidDataset identifier assigned by the publishermeta.ref.ivoidssa:Curation.PublisherDIDcharnullableaccrefAccess key for the datameta.ref.urlAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicyrcharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.Sizelongnullablessa_locationICRS location of aperture centerdegpos.eqssa:Char.SpatialAxis.Coverage.Location.Valuedoubleindexednullablessa_regionRough coverage based on location and aperture.pos.outline;obs.fielddoubleindexednullabledatalinkA DataLink document for this spectrum, providing SODA access and the original file.meta.ref.urlcharnullablewave_minMinimum wavelength covered by the spectrum.mem.wl;stat.mindoublenullablewave_maxMaximum wavelength covered by the spectrum.mem.wl;stat.maxdoublenullablespecrpSpectral resolving power lambda/dlambda.spect.resolutionfloatnullablecalib_levelObsCore-style calibration level. Merged relative flux spectra are level 2.meta.code.qualshortorigfileOriginal FITS file name before KazVO metadata enrichment.meta.idcharnullablepuborgPublishing archive or organisation.meta.curationcharnullabledataorigOrigin of the data with respect to KazVO/FAI.meta.notecharnullableobserverObserver(s) listed in the FITS header.meta.id;obs.observercharnullabletelescopeTelescope used for the observation.instr.telcharnullableinstrumentInstrument or spectrograph used for the observation.instrcharnullablecameraCamera listed in the FITS header.meta.id;instr.detcharnullabledetnamDetector name listed in the FITS header.meta.id;instr.detcharnullablebunitFlux unit from the enriched FITS header.meta.unitcharnullablenormTrue if the merged spectrum is continuum-normalized.meta.codebooleanwavecalTrue if the spectrum is wavelength calibrated.meta.codebooleanfluxcalFlux calibration status from the enriched FITS header.meta.codecharnullablebiascorTrue if bias correction was applied.meta.codebooleandarkcorTrue if dark correction was applied.meta.codebooleanbpixcorTrue if bad-pixel map correction was applied.meta.codebooleanflatcorTrue if flat-field correction was applied.meta.codebooleancosmicrCosmic ray removal method.meta.codecharnullabletellcorTrue if telluric correction was applied.meta.codebooleanhelcorTrue if heliocentric correction was applied.meta.codeboolean