List of Fields available via Retrieve
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
data_release | CORE | — | [Categorical] Data release of a given record (with a common data structure, e.g., SDSS-DR16, BOSS-DR16) | ✘ | ✔ |
datasetgroup | CORE | — | [Categorical] Common name for a coherent set of spectra published as a single release (e.g., SDSS_BOSS) | ✘ | ✔ |
dateobs | CORE | — | Range of observational dates for a given spectrum (single value for a single date) | ✘ | ✔ |
dateobs_center | CORE | — | Central value of the dateobs range | ✘ | ✔ |
dec | CORE | deg | Declination in degrees | ✔ | ✔ |
exptime | CORE | second | Exposure time in seconds | ✘ | ✔ |
extra_files | CORE | — | Additional files read for ingest | ✘ | ✘ |
file | CORE | — | File used for this record | ✘ | ✘ |
instrument | CORE | — | [Categorical] Instrument used for observation | ✘ | ✔ |
ra | CORE | deg | Right Ascension in degrees | ✔ | ✔ |
redshift | CORE | — | Measured redshift, or radial velocity in units of redshift | ✘ | ✔ |
redshift_err | CORE | — | Uncertainty on the measured redshift, or radial velocity in units of redshift | ✘ | ✔ |
redshift_warning | CORE | — | Bitmask with warning on redshift result | ✘ | ✔ |
site | CORE | — | [Categorical] Site of observations | ✘ | ✔ |
sparcl_id | CORE | — | Universally Unique Identifier for spectrum in SPARCL | ✔ | ✔ |
specid | CORE | — | Dataset-specific spectrum identifier (may not be unique) | ✔ | ✔ |
specprimary | CORE | — | Whether an entry is the primary spectrum for a given target object | ✘ | ✔ |
spectype | CORE | — | [Categorical] Spectral type of the object (STAR, GALAXY, QSO) | ✘ | ✔ |
targetid | CORE | — | Dataset-specific photometric target identifier | ✘ | ✔ |
telescope | CORE | — | [Categorical] Telescope used for the observation | ✘ | ✔ |
updated | CORE | — | Date and time when the record was created/updated | ✘ | ✘ |
wavemax | CORE | AA | Maximum value of wavelength coverage in Angstroms | ✘ | ✔ |
wavemin | CORE | AA | Minimum value of wavelength coverage in Angstroms | ✘ | ✔ |
.csv
Download .json
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
targetobjid | AUX | — | Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version) | ✘ | ✔ |
class_person | AUX | — | Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy) | ✘ | ✔ |
platerun | AUX | — | Drilling run that this plate was drilled in | ✘ | ✔ |
fracnsiglo | AUX | — | Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
spectrographid | AUX | — | Which spectrograph (1 or 2) | ✘ | ✔ |
eboss_target0 | AUX | — | SEQUELS, TDSS and SPIDERS target selection flags | ✘ | ✔ |
elodie_teff | AUX | Kelvin | Effective temperature of ELODIE star | ✘ | ✔ |
chi68p | AUX | — | 68-th percentile value of abs(chi) of the best-fit synthetic spectrum to the actual spectrum (around 1.0 for a good fit) | ✘ | ✔ |
plate | AUX | — | Plate number (each plate corresponds to an actual plug plate) | ✘ | ✔ |
vdispnpix | AUX | — | Number of pixels overlapping the templates used in the velocity dispersion fit | ✘ | ✔ |
chunk | AUX | — | Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples | ✘ | ✔ |
sectarget | AUX | — | Deprecated version of secondary (calibration) target flags (meanings highly overloaded) | ✘ | ✔ |
speclegacy | AUX | — | Set to 1 for primary SDSS Legacy program observation of object, 0 otherwise | ✘ | ✔ |
firstrelease | AUX | — | Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with | ✘ | ✔ |
eboss_target2 | AUX | — | eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey | ✘ | ✔ |
rchi2 | AUX | — | Reduced chi-squared of best fit | ✘ | ✔ |
vdispdof | AUX | — | Number of degrees of freedom in velocity dispersion fit | ✘ | ✔ |
deredsn2 | AUX | — | Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) | ✘ | ✔ |
segue1_target1 | AUX | — | Primary (science) target flags for SEGUE-1 targets | ✘ | ✔ |
mjd | AUX | days | Modified Julian Day of observation | ✘ | ✔ |
platequality | AUX | — | Final quality of plate this spectrum came from (good, marginal, or bad) | ✘ | ✔ |
class_noqso | AUX | — | Spectroscopic classification for Z_NOQSO redshift | ✘ | ✔ |
calibflux_ivar | AUX | nanomaggy-2 | Inverse variances of ugriz fluxes used for calibrations | ✘ | ✔ |
spectroflux_ivar | AUX | nanomaggy-2 | Inverse variance of spectrum projected onto ugriz filters | ✘ | ✔ |
fracnsighi | AUX | — | Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit used for classification and redshift | ✘ | ✔ |
sky | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Subtracted sky flux | ✘ | ✔ |
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |
wave_sigma | SPECTRA | pixel | Line-spread function width (sigma of approximating Gaussian) in units of number of pixel | ✘ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |
mask | SPECTRA | — | and_mask | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
boss_specobj_id | AUX | — | Identification number internal to BOSS for SPECBOSS=1 objects | ✘ | ✔ |
special_target1 | AUX | — | Primary (science) target flags for SDSS-I and SDSS-II special program targets | ✘ | ✔ |
objid | AUX | — | SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID) | ✘ | ✔ |
dof | AUX | — | Number of degrees of freedom in best fit | ✘ | ✔ |
calibflux | AUX | nanomaggy | ugriz fluxes used for calibrations | ✘ | ✔ |
lambda_eff | AUX | AA | Effective wavelength drilling position was optimized for | ✘ | ✔ |
vdispnpix | AUX | — | Number of pixels overlapping the templates used in the velocity dispersion fit | ✘ | ✔ |
z_person | AUX | — | Visual-inspection redshift | ✘ | ✔ |
spectroflux | AUX | nanomaggy | Spectrum projected onto ugriz filters | ✘ | ✔ |
xfocal | AUX | mm | Hole position on plate (+X = +RA) | ✘ | ✔ |
fracnsiglo | AUX | — | Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
sn_median | AUX | — | Median signal-to-noise per pixel within each of the ugriz bandpasses | ✘ | ✔ |
anyandmask | AUX | — | For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK | ✘ | ✔ |
spec1_r | AUX | — | Signal-to-noise squared for spectrograph #1, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra | ✘ | ✔ |
elodie_object | AUX | — | Star name for ELODIE star | ✘ | ✔ |
segue1_target2 | AUX | — | Primary (science) target flags for SEGUE-1 targets | ✘ | ✔ |
speclegacy | AUX | — | Set to 1 for primary SDSS Legacy program observation of object, 0 otherwise | ✘ | ✔ |
spectrosynflux_ivar | AUX | nanomaggy-2 | Inverse variance of best-fit template spectrum projected onto ugriz filters | ✘ | ✔ |
legacy_target1 | AUX | — | Primary (science) target flags for SDSS-I and SDSS-II Legacy survey | ✘ | ✔ |
designid | AUX | — | Design identification number for plate | ✘ | ✔ |
ancillary_target2 | AUX | — | BOSS ancillary target selection information at plate design | ✘ | ✔ |
elodie_rchi2 | AUX | — | Reduced chi-squared of fit to best ELODIE star | ✘ | ✔ |
eboss_target2 | AUX | — | eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey | ✘ | ✔ |
platequality | AUX | — | Final quality of plate this spectrum came from (good, marginal, or bad) | ✘ | ✔ |
platesn2 | AUX | — | Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates) | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
mask | SPECTRA | — | and_mask | ✘ | ✔ |
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit used for classification and redshift | ✘ | ✔ |
sky | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Subtracted sky flux | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |
wave_sigma | SPECTRA | pixel | Line-spread function width (sigma of approximating Gaussian) in units of number of pixel | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
zwarning_noqso | AUX | — | Warnings in z_noqso redshift (BOSS spectra only) | ✘ | ✔ |
z_person | AUX | — | Visual-inspection redshift | ✘ | ✔ |
zoffset | AUX | micron | Washer thickness used for backstopping BOSS quasar targets, so they are closer to 4000 Angstrom focal plan | ✘ | ✔ |
z_noqso | AUX | — | Best redshift when ignoring QSO fits, recommended for BOSS CMASS and LOWZ targets; calculated only for survey=boss spectra, not for any SDSS spectrograph data | ✘ | ✔ |
z_err_noqso | AUX | — | Error in Z_NOQSO redshift | ✘ | ✔ |
z_conf_person | AUX | — | Visual-inspection confidence (0=not inspected or no confidence, 1,2=low confidence, 3,4=high confidence) | ✘ | ✔ |
yfocal | AUX | mm | Hole position on plate (+Y = +DEC) | ✘ | ✔ |
xfocal | AUX | mm | Hole position on plate (+X = +RA) | ✘ | ✔ |
wcoverage | AUX | — | Coverage in wavelength, in units of log10 wavelength | ✘ | ✔ |
vdispz_err | AUX | — | Error in redshift associated with best-fit velocity dispersion | ✘ | ✔ |
vdispz | AUX | — | Redshift associated with best-fit velocity dispersion | ✘ | ✔ |
vdispnpix | AUX | — | Number of pixels overlapping the templates used in the velocity dispersion fit | ✘ | ✔ |
vdisp_err | AUX | km s-1 | Error in velocity dispersion | ✘ | ✔ |
vdispdof | AUX | — | Number of degrees of freedom in velocity dispersion fit | ✘ | ✔ |
vdispchi2 | AUX | — | Chi-squared for best-fit velocity dispersion | ✘ | ✔ |
vdisp | AUX | km s-1 | Velocity dispersion | ✘ | ✔ |
tile | AUX | — | Tile number (each tile can have several plates drilled for it) | ✘ | ✔ |
thing_id_targeting | AUX | — | Resolve THING_ID in SDSS imaging for targeted object | ✘ | ✔ |
thing_id | AUX | — | Resolve THING_ID in SDSS imaging for best positional match | ✘ | ✔ |
theta | AUX | — | Template coefficients of best fit | ✘ | ✔ |
tfile | AUX | — | File that best fit template comes from in idlspec2d product | ✘ | ✔ |
tcolumn | AUX | — | Columns of template files that correspond to each template | ✘ | ✔ |
targettype | AUX | — | General type of target (SCIENCE, STANDARD, or SKY) | ✘ | ✔ |
targetobjid | AUX | — | Unique database ID of targeting object based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version) | ✘ | ✔ |
survey | AUX | — | Survey name | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
sky | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Subtracted sky flux | ✘ | ✔ |
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit used for classification and redshift | ✘ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |
wave_sigma | SPECTRA | pixel | Line-spread function width (sigma of approximating Gaussian) in units of number of pixel | ✘ | ✔ |
mask | SPECTRA | — | and_mask | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
bgs_target | AUX | — | BGS (Bright Galaxy Survey) target selection bitmask | ✘ | ✔ |
chi2 | AUX | — | Best fit chi-squared | ✘ | ✔ |
cmx_target | AUX | — | Target selection bitmask for commissioning | ✘ | ✔ |
coadd_fiberstatus | AUX | — | Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd | ✘ | ✔ |
coadd_numexp | AUX | — | Number of exposures included in the coadd for this target | ✘ | ✔ |
coadd_numnight | AUX | — | Number of different nights included in the coadd for this target | ✘ | ✔ |
coadd_numtile | AUX | — | Number of different tiles included in the coadd for this target | ✘ | ✔ |
coeff | AUX | — | Redrock template coefficients | ✘ | ✔ |
deltachi2 | AUX | — | Delta-chi-squared for template fit from Redrock | ✘ | ✔ |
desi_target | AUX | — | DESI (dark time program) target selection bitmask | ✘ | ✔ |
fa_target | AUX | — | Targeting bit internally used by fiberassign (linked with FA_TYPE) | ✘ | ✔ |
fa_type | AUX | — | Fiberassign internal target type (science, standard, sky, safe, suppsky) | ✘ | ✔ |
firstnight | AUX | — | First calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night | ✘ | ✔ |
healpix | AUX | — | HEALPixel containing this location at NSIDE=64 in the NESTED scheme | ✘ | ✔ |
lastnight | AUX | — | Last calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night | ✘ | ✔ |
mean_delta_x | AUX | mm | Mean (over exposures) fiber difference between measured and requested CS5 X location on focal plane | ✘ | ✔ |
mean_delta_y | AUX | mm | Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane | ✘ | ✔ |
mean_fiber_dec | AUX | deg | Mean (over exposures) DEC of actual fiber position | ✘ | ✔ |
mean_fiber_ra | AUX | deg | Mean (over exposures) RA of actual fiber position | ✘ | ✔ |
mean_mjd | AUX | days | Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened | ✘ | ✔ |
mean_psf_to_fiber_specflux | AUX | — | Mean of input exposures fraction of light from point-like source captured by 1.5 arcsec diameter fiber given atmospheric seeing | ✘ | ✔ |
mws_target | AUX | — | Milky Way Survey targeting bits | ✘ | ✔ |
ncoeff | AUX | — | Number of Redrock template coefficients | ✘ | ✔ |
npixels | AUX | — | Number of unmasked wavelengths that contributed to the redshift fit | ✘ | ✔ |
numobs_init | AUX | — | Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
wave_sigma | SPECTRA | AA | Line-spread function width (sigma of approximating Gaussian) in units of Angstroms | ✘ | ✔ |
mask | SPECTRA | — | Mask value | ✘ | ✔ |
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |