Information on Service 'TCO eShel Spectra of Hot Supergiants'

[Use this service from your browser]

Further access options are discussed below

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:

Observational Setup and Instrumentation:

Spectral Characteristics:

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.

For a list of all services and tables belonging to this service's resource, see Information on resource 'TCO eShel Spectra of Hot Supergiants'

Overview

You can access this service using:

This resource is not (directly) published. This can mean that it was deemed too unimportant, for internal use only, or is just a helper for a published service. Equally likely, however, it is under development, abandoned in development or otherwise unfinished. Exercise some caution.

Other services provided on the underlying data include:

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
ssa_dateObs Date Obs. Midpoint of exposure (MJD) d time.epoch
ssa_location Location ICRS location of aperture center deg pos.eq
ssa_targname Target Object Common name of object observed. N/A meta.id;src

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
accref Product key Access key for the data N/A meta.ref.url;meta.dataset
datalink DataLink A DataLink document for this spectrum, providing SODA access and the original file. N/A meta.ref.url
location_dec Dec N/A deg pos.eq.dec;meta.main
location_ra RA N/A deg pos.eq.ra;meta.main
ssa_dateObs Date Obs. Midpoint of exposure (MJD) d time.epoch
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min
ssa_targname Object Common name of object observed. N/A meta.id;src

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
accref Product key Access key for the data N/A meta.ref.url;meta.dataset 1
ssa_location Location ICRS location of aperture center deg pos.eq 5
ssa_dateObs Date Obs. Midpoint of exposure (MJD) d time.epoch 5
ssa_timeExt Exp. Time Exposure duration s time.duration 5
ssa_length Length Number of points in the spectrum N/A N/A 5
accsize File size Size of the data in bytes byte N/A 11
ssa_dstitle Title A compact and descriptive designation of the dataset. N/A meta.title;meta.dataset 15
ssa_creatorDID C. DID Dataset identifier assigned by the creator N/A meta.id 15
ssa_pubDID P. DID Dataset identifier assigned by the publisher N/A meta.ref.ivoid 15
ssa_cdate Proc. Date Processing/Creation date N/A time;meta.dataset 15
ssa_pdate Pub. Date Date last published. N/A N/A 15
ssa_bandpass 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. N/A instr.bandpass 15
ssa_cversion C. Version Creator assigned version for this dataset (will be incremented when this particular item is changed). N/A meta.version;meta.dataset 15
ssa_targname Object Common name of object observed. N/A meta.id;src 15
ssa_targclass Ob. cls Object class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible) N/A src.class 15
ssa_redshift z Redshift of target object N/A src.redshift 15
ssa_targetpos Obj. pos Equatorial (ICRS) position of the target object. N/A pos.eq;src 15
ssa_snr SNR Signal-to-noise ratio estimated for this dataset N/A stat.snr 15
ssa_aperture Aperture Angular diameter of aperture deg phys.angSize;instr.fov 15
ssa_specmid Mid. Band Midpoint of region covered in this dataset m instr.bandpass 15
ssa_specext Bandwidth Width of the spectrum m instr.bandwidth 15
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min 15
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max 15
ssa_csysName Sys System RA and Dec are given in N/A N/A 15
ssa_spectralucd UCD(spectral) 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. N/A meta.ucd 15
ssa_spectralunit unit(spectral) Unit of the spectral column N/A meta.unit 15
ssa_fluxucd UCD(flux) UCD of the flux column N/A meta.ucd 15
ssa_fluxunit unit(flux) Unit of the flux column N/A meta.unit 15
ssa_publisher Publisher Publisher of the datasets included here. N/A meta.curation 15
ssa_creator Creator Creator of the datasets included here. N/A N/A 15
ssa_collection Collection A short handle naming the collection this spectrum belongs to. N/A N/A 15
ssa_instrument Instrument Instrument or code used to produce these datasets N/A meta.id;instr 15
ssa_datasource Src Method of generation for the data (one of survey, pointed, theory, custom, artificial). N/A N/A 15
ssa_creationtype Using Process used to produce the data (archival, cutout, filtered, mosaic, projection, spectralExtraction, or catalogExtraction) N/A N/A 15
ssa_reference Ref. URL or bibcode of a publication describing this data. N/A meta.bib.bibcode 15
ssa_fluxStatError Err. flux Statistical error in flux N/A stat.error;phot.flux.density;em 15
ssa_fluxSysError Sys. Err flux Systematic error in flux N/A stat.error.sys;phot.flux.density;em 15
ssa_fluxcalib Calib Flux Type of flux calibration (ABSOLUTE, CALIBRATED, RELATIVE, NORMALIZED, or UNCALIBRATED). N/A N/A 15
ssa_binSize Spect. Bin Bin size in wavelength m em.wl;spect.binSize 15
ssa_spectStatError Err. Spect Statistical error in wavelength m stat.error;em 15
ssa_spectSysError Sys. Err. Spect Systematic error in wavelength m stat.error.sys;em 15
ssa_speccalib Calib. Spect. Type of wavelength calibration N/A meta.code.qual 15
ssa_specres Spec. Res. Resolution (in meters of wavelength) on the spectral axis m spect.resolution;em.wl 15
ssa_spaceError Err. Spc Statistical error in position deg stat.error;pos.eq 15
ssa_spaceCalib Calib. Spc Type of calibration in spatial coordinates N/A meta.code.qual 15
ssa_spaceRes Res. Spc Spatial resolution of data deg pos.angResolution 15
datalink DataLink A DataLink document for this spectrum, providing SODA access and the original file. N/A meta.ref.url 15
wave_min λ min Minimum wavelength covered by the spectrum. m em.wl;stat.min 15
wave_max λ max Maximum wavelength covered by the spectrum. m em.wl;stat.max 15
specrp R Spectral resolving power lambda/dlambda. N/A spect.resolution 15
calib_level Calib Level ObsCore-style calibration level. Merged relative flux spectra are level 2. N/A meta.code.qual 15
observer Observer Observer(s) listed in the FITS header. N/A meta.id;obs.observer 15
telescope Telescope Telescope used for the observation. N/A instr.tel 15
instrument Instrument Instrument or spectrograph used for the observation. N/A instr 15
bunit Flux unit Flux unit from the enriched FITS header. N/A meta.unit 15
norm Normalized True if the merged spectrum is continuum-normalized. N/A meta.code 15
fluxcal Flux calibration Flux calibration status from the enriched FITS header. N/A meta.code 15
mime Type MIME type of the file served N/A meta.code.mime 20
ssa_model Model Data model name and version N/A N/A 20
ssa_timeSI [Time] Time conversion factor in Osuna-Salgado convention. N/A N/A 20
ssa_spectralSI [Spectral] Spectral conversion factor in Osuna-Salgado convention N/A N/A 20
ssa_fluxSI [Flux] Flux/magnitude conversion factor in Osuna-Salgado convention N/A N/A 20
ssa_dstype Data type Type of data (spectrum, time series, etc) N/A N/A 20
owner Owner Owner of the data N/A N/A 25
embargo Embargo ends Date the data will become/became public yr N/A 25
origfile Original file Original FITS file name before KazVO metadata enrichment. N/A meta.id 25
puborg Publisher Publishing archive or organisation. N/A meta.curation 25
dataorig Data origin Origin of the data with respect to KazVO/FAI. N/A meta.note 25
camera Camera Camera listed in the FITS header. N/A meta.id;instr.det 25
detnam Detector Detector name listed in the FITS header. N/A meta.id;instr.det 25
wavecal Wavecal True if the spectrum is wavelength calibrated. N/A meta.code 25
biascor Bias corrected True if bias correction was applied. N/A meta.code 25
darkcor Dark corrected True if dark correction was applied. N/A meta.code 25
bpixcor Bad pixels True if bad-pixel map correction was applied. N/A meta.code 25
flatcor Flat corrected True if flat-field correction was applied. N/A meta.code 25
cosmicr Cosmic rays Cosmic ray removal method. N/A meta.code 25
tellcor Telluric corrected True if telluric correction was applied. N/A meta.code 25
helcor Heliocentric corrected True if heliocentric correction was applied. N/A meta.code 25
ssa_region Coverage Rough coverage based on location and aperture. N/A pos.outline;obs.field 30

Citation Info

VOResource XML (that's something exclusively for VO nerds)