accsize -- Size of the data in bytes bad_b -- 1 if this is a problematic B spectrum. bad_r -- 1 if this is a problematic R spectrum. coadd -- 1 if this is a co-added spectrum dec -- ICRS declination for this object from input catalogue dec_obs -- ICRS declination of the fiber pointing designation -- Target Designation (IAU style) embargo -- Date the data will become/became public fiberid -- Identifier of the fiber used to take the source spectrum fibermask -- Bitmask for fiber problems. See note for the meaning for the bits. fibertype -- Fiber Type of target (one of Obj, Sky, F-std, Unused, PosErr, Dead) mag_arr -- An array of derived magnitudes. See mag_types for the bands these magnitudes are intended for. magtype -- Designation of the bands of the magnitudes in mag_arr; this is not easy to parse by a machine, sorry. mobsid -- Unique identifier for the medium resolution spectrum (most of these have multiple observations and include a coadded spectrum). objtype -- Object type: star, k2star, fs, rvcandi, gal obsid -- Unique identifier for the observation; LAMOST observations typically result in multiple spectra. offset_v -- Offset of the observation from the target coordinate (these are added for bright objects to prevent saturation). owner -- Owner of the data planid -- Identifier of the observation plan ra -- ICRS right ascension for this object from input catalogue ra_obs -- ICRS right ascension of the fiber pointing (can be different from ra for bright sources). rv_b0 -- Radial velocity estimated from the B spectrum after continuum removal. rv_b0_err -- Error in rv_b0. rv_b1 -- rv_b0 after zero-point correction rv_b1_err -- Error in rv_b1. rv_b_flag -- Flag for RV extraction in the b band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template. rv_br0 -- Radial velocity estimated from the B and R spectra after continuum removal. rv_br0_err -- Error in rv_br0. rv_br1 -- rv_br0 after zero-point correction rv_br1_err -- Error in rv_br1. rv_br_flag -- Flag for RV extraction in the br band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template. rv_lasp0 -- Radial velocity estimated from the LAMOST stellar parameter pipeline. rv_lasp0_err -- Error in rv_lasp0. rv_lasp1 -- rv_lasp0 after zero-point correction rv_lasp1_err -- Error in rv_lasp1. rv_r0 -- Radial velocity estimated from the R spectrum after continuum removal. rv_r0_err -- Error in rv_r0. rv_r1 -- rv_r0 after zero-point correction rv_r1_err -- Error in rv_r1. rv_r_flag -- Flag for RV extraction in the r band: 0 – no anomalies; 1 – too many bad pixels; 2 – radial velocity in excess of 450 km/s; 3 – low similarity with best-matched template. spid -- Identifier of the Spectragraph that took the source spectrum. 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_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 -- Median signal to noise ratio over all pixel, computed as flux/sqrt(variance) 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_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_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_timeExt -- Exposure duration ssa_timeSI -- Time conversion factor in Osuna-Salgado convention. target_comment -- Various comments (e.g., an external target id).
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