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 |
---|---|---|---|---|---|
eboss_target_id | AUX | — | EBOSS unique target identifier for every spectroscopic target | ✘ | ✔ |
anyandmask | AUX | — | For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK | ✘ | ✔ |
boss_specobj_id | AUX | — | Identification number internal to BOSS for SPECBOSS=1 objects | ✘ | ✔ |
marvels_target2 | AUX | — | Secondary (calibration) target flags for MARVELS targets | ✘ | ✔ |
sourcetype | AUX | — | String expressing type of source (similar to OBJTYPE in DR8 and earlier) | ✘ | ✔ |
class_person | AUX | — | Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy) | ✘ | ✔ |
class_noqso | AUX | — | Spectroscopic classification for Z_NOQSO redshift | ✘ | ✔ |
platequality | AUX | — | Final quality of plate this spectrum came from (good, marginal, or bad) | ✘ | ✔ |
vdispnpix | AUX | — | Number of pixels overlapping the templates used in the velocity dispersion fit | ✘ | ✔ |
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 | ✘ | ✔ |
segue1_target1 | AUX | — | Primary (science) target flags for SEGUE-1 targets | ✘ | ✔ |
plate | AUX | — | Plate number (each plate corresponds to an actual plug plate) | ✘ | ✔ |
fracnsiglo | AUX | — | Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
comments_person | AUX | — | Visual-inspection comments | ✘ | ✔ |
segue2_target1 | AUX | — | Primary (science) target flags for SEGUE-2 targets | ✘ | ✔ |
deredsn2 | AUX | — | Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) | ✘ | ✔ |
specsegue2 | AUX | — | Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise | ✘ | ✔ |
ancillary_target2 | AUX | — | BOSS ancillary target selection information at plate design | ✘ | ✔ |
cy | AUX | — | y of Normal unit vector in J2000 | ✘ | ✔ |
legacy_target2 | AUX | — | Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey | ✘ | ✔ |
specsegue | AUX | — | Set to 1 for primary SDSS SEGUE program observation of object (including SEGUE-1 and SEGUE-2), 0 otherwise | ✘ | ✔ |
targettype | AUX | — | General type of target (SCIENCE, STANDARD, or SKY) | ✘ | ✔ |
spec1_i | AUX | — | Signal-to-noise squared for spectrograph #1, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra | ✘ | ✔ |
vdispdof | AUX | — | Number of degrees of freedom in velocity dispersion fit | ✘ | ✔ |
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) | ✘ | ✔ |
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 |
---|---|---|---|---|---|
spec1_i | AUX | — | Signal-to-noise squared for spectrograph #1, at i=19.90 for SDSS spectrograph spectra, i=20.20 for BOSS spectrograph spectra | ✘ | ✔ |
comments_person | AUX | — | Visual-inspection comments | ✘ | ✔ |
tcolumn | AUX | — | Columns of template files that correspond to each template | ✘ | ✔ |
z_err_noqso | AUX | — | Error in Z_NOQSO redshift | ✘ | ✔ |
platerun | AUX | — | Drilling run that this plate was drilled in | ✘ | ✔ |
run2d | AUX | — | Spectroscopic 2D reduction (extraction of spectra) name | ✘ | ✔ |
subclass | AUX | — | Best spectroscopic subclassification | ✘ | ✔ |
plateid | AUX | — | Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version) | ✘ | ✔ |
vdispz | AUX | — | Redshift associated with best-fit velocity dispersion | ✘ | ✔ |
mjd | AUX | days | Modified Julian Day of observation | ✘ | ✔ |
tfile | AUX | — | File that best fit template comes from in idlspec2d product | ✘ | ✔ |
spec1_g | AUX | — | Signal-to-noise squared for spectrograph #1, at g=20.20 for SDSS spectrograph spectra, g=21.20 for BOSS spectrograph spectra | ✘ | ✔ |
cy | AUX | — | y of Normal unit vector in J2000 | ✘ | ✔ |
sn_median_all | AUX | — | Median signal-to-noise per pixel across full spectrum | ✘ | ✔ |
vdispdof | AUX | — | Number of degrees of freedom in velocity dispersion fit | ✘ | ✔ |
nspecobs | AUX | — | Number of spectroscopic observations of this source | ✘ | ✔ |
bluefiber | AUX | — | Set to 1 if this hole was designated a blue fiber, 0 if designated a red fiber (high redshift LRGs are preferentially in red fibers) | ✘ | ✔ |
sourcetype | AUX | — | String expressing type of source (similar to OBJTYPE in DR8 and earlier) | ✘ | ✔ |
spec2_r | AUX | — | Signal-to-noise squared for spectrograph #2, at r=20.25 for SDSS spectrograph spectra, r=20.20 for BOSS spectrograph spectra | ✘ | ✔ |
elodie_z_err | AUX | — | Error in redshift fit to ELODIE star | ✘ | ✔ |
ancillary_target1 | AUX | — | BOSS ancillary science target selection information at plate design | ✘ | ✔ |
specsdss | AUX | — | Set to 1 for primary SDSS spectrograph observation of object, 0 otherwise | ✘ | ✔ |
wcoverage | AUX | — | Coverage in wavelength, in units of log10 wavelength | ✘ | ✔ |
spectrosynflux | AUX | nanomaggy | Best-fit template spectrum projected onto ugriz filters | ✘ | ✔ |
rchi2 | AUX | — | Reduced chi-squared of best fit | ✘ | ✔ |
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 |
---|---|---|---|---|---|
elodie_dof | AUX | — | Degrees of freedom in fit to best ELODIE star | ✘ | ✔ |
elodie_feh | AUX | — | Metallicity [Fe/H] of ELODIE star | ✘ | ✔ |
elodie_filename | AUX | — | File name for best-fit ELODIE star | ✘ | ✔ |
elodie_logg | AUX | — | log10(gravity) of ELODIE star | ✘ | ✔ |
elodie_object | AUX | — | Star name for ELODIE star | ✘ | ✔ |
elodie_rchi2 | AUX | — | Reduced chi-squared of fit to best ELODIE star | ✘ | ✔ |
elodie_sptype | AUX | — | ELODIE star spectral type | ✘ | ✔ |
elodie_teff | AUX | Kelvin | Effective temperature of ELODIE star | ✘ | ✔ |
elodie_z | AUX | — | Redshift fit to ELODIE star | ✘ | ✔ |
elodie_z_err | AUX | — | Error in redshift fit to ELODIE star | ✘ | ✔ |
elodie_z_modelerr | AUX | — | Standard deviation in redshift among the 12 best-fit ELODIE stars | ✘ | ✔ |
fiberid | AUX | — | Fiber number | ✘ | ✔ |
firstrelease | AUX | — | Name of first release this PLATE, MJD, FIBERID, RUN2D was associated with | ✘ | ✔ |
fluxobjid | AUX | — | Unique database ID of flux-based photometric match based on RUN, RERUN, CAMCOl, FIELD, ID (same as SkyServer version) | ✘ | ✔ |
fracnsighi | AUX | — | Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
fracnsiglo | AUX | — | Fraction of pixels low by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
fracnsigma | AUX | — | Fraction of pixels deviant by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
lambda_eff | AUX | AA | Effective wavelength drilling position was optimized for | ✘ | ✔ |
legacy_target1 | AUX | — | Primary (science) target flags for SDSS-I and SDSS-II Legacy survey | ✘ | ✔ |
legacy_target2 | AUX | — | Secondary (calibration) target flags for SDSS-I and SDSS-II Legacy survey | ✘ | ✔ |
marvels_target1 | AUX | — | Primary (science) target flags for MARVELS targets | ✘ | ✔ |
marvels_target2 | AUX | — | Secondary (calibration) target flags for MARVELS targets | ✘ | ✔ |
mjd | AUX | days | Modified Julian Day of observation | ✘ | ✔ |
npoly | AUX | — | Number of polynomial terms in fit | ✘ | ✔ |
nspecobs | AUX | — | Number of spectroscopic observations of this source | ✘ | ✔ |
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 |
---|---|---|---|---|---|
chi2 | AUX | — | Best fit chi-squared | ✘ | ✔ |
bgs_target | AUX | — | BGS (Bright Galaxy Survey) target selection bitmask | ✘ | ✔ |
sv1_bgs_target | AUX | — | BGS (bright time program) target selection bitmask for SV1 | ✘ | ✔ |
sv2_bgs_target | AUX | — | BGS (bright time program) target selection bitmask for SV2 | ✘ | ✔ |
sv3_bgs_target | AUX | — | BGS (bright time program) target selection bitmask for SV3 | ✘ | ✔ |
tsnr2_bgs | AUX | — | BGS template (S/N)^2 summed over B,R,Z | ✘ | ✔ |
obsconditions | AUX | — | Bit-coded of allowed observing conditions | ✘ | ✔ |
coadd_fiberstatus | AUX | — | Bitwise AND of the FIBERSTATUS values of the spectra used in the coadd | ✘ | ✔ |
sv_primary | AUX | — | Boolean flag (True/False) for the primary coadded spectrum in SV (SV1+2+3) | ✘ | ✔ |
plate_dec | AUX | deg | Declination to be used by PlateMaker | ✘ | ✔ |
deltachi2 | AUX | — | Delta-chi-squared for template fit from Redrock | ✘ | ✔ |
desi_target | AUX | — | DESI (dark time program) target selection bitmask | ✘ | ✔ |
sv1_desi_target | AUX | — | DESI (dark time program) target selection bitmask for SV1 | ✘ | ✔ |
sv2_desi_target | AUX | — | DESI (dark time program) target selection bitmask for SV2 | ✘ | ✔ |
sv3_desi_target | AUX | — | DESI (dark time program) target selection bitmask for SV3 | ✘ | ✔ |
program | AUX | — | DESI program type - BRIGHT, DARK, BACKUP, OTHER | ✘ | ✔ |
tsnr2_elg | AUX | — | ELG template (S/N)^2 summed over B,R,Z | ✘ | ✔ |
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 | ✘ | ✔ |
tsnr2_gpbbackup | AUX | — | GPBBACKUP template (S/N)^2 summed over BRZ | ✘ | ✔ |
tsnr2_gpbbright | AUX | — | GPBBRIGHT template (S/N)^2 summed over B,R,Z | ✘ | ✔ |
tsnr2_gpbdark | AUX | — | GPBDARK template (S/N)^2 summed over BRZ | ✘ | ✔ |
healpix | AUX | — | HEALPixel containing this location at NSIDE=64 in the NESTED scheme | ✘ | ✔ |
numobs_init | AUX | — | Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS | ✘ | ✔ |
lastnight | AUX | — | Last calendar date of the exposures used in the coadded spectrum as YYYYMMDD of the beginning of the observing night | ✘ | ✔ |
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 | — | 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 | ✔ | ✔ |
wave_sigma | SPECTRA | AA | Line-spread function width (sigma of approximating Gaussian) in units of Angstroms | ✘ | ✔ |