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 |
---|---|---|---|---|---|
ancillary_target1 | AUX | — | BOSS ancillary science target selection information at plate design | ✘ | ✔ |
ancillary_target2 | AUX | — | BOSS ancillary target selection information at plate design | ✘ | ✔ |
anyandmask | AUX | — | For each bit, records whether any pixel in the spectrum has that bit set in its ANDMASK | ✘ | ✔ |
anyormask | AUX | — | For each bit, records whether any pixel in the spectrum has that bit set in its ORMASK | ✘ | ✔ |
bluefiber | AUX | — | Set to 1 if this was requested to be a blue fiber target, 0 if it was a red fiber (in BOSS high redshift LRGs are requested to be on red fibers) | ✘ | ✔ |
boss_specobj_id | AUX | — | Identification number internal to BOSS for SPECBOSS=1 objects | ✘ | ✔ |
boss_target1 | AUX | — | Primary (science) target flags for BOSS targets | ✘ | ✔ |
boss_target2 | AUX | — | Always set to zero (placeholder for BOSS target flags never used) | ✘ | ✔ |
calibflux | AUX | nanomaggy | ugriz fluxes used for calibrations | ✘ | ✔ |
calibflux_ivar | AUX | nanomaggy-2 | Inverse variances of ugriz fluxes used for calibrations | ✘ | ✔ |
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) | ✘ | ✔ |
chunk | AUX | — | Name of tiling chunk that this spectrum was tiled in (boss1, boss2, etc), important for tracking large-scale structure samples | ✘ | ✔ |
class_noqso | AUX | — | Spectroscopic classification for Z_NOQSO redshift | ✘ | ✔ |
class_person | AUX | — | Visual-inspection classification (0=not inspected or unknown, 1=star, 2=narrow emission-line galaxy, 3=QSO, 4=galaxy) | ✘ | ✔ |
comments_person | AUX | — | Visual-inspection comments | ✘ | ✔ |
cx | AUX | — | x of Normal unit vector in J2000 | ✘ | ✔ |
cy | AUX | — | y of Normal unit vector in J2000 | ✘ | ✔ |
cz | AUX | — | z of Normal unit vector in J2000 | ✘ | ✔ |
deredsn2 | AUX | — | Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) | ✘ | ✔ |
designid | AUX | — | Design identification number for plate | ✘ | ✔ |
dof | AUX | — | Number of degrees of freedom in best fit | ✘ | ✔ |
eboss_target0 | AUX | — | SEQUELS, TDSS and SPIDERS target selection flags | ✘ | ✔ |
eboss_target1 | AUX | — | eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey | ✘ | ✔ |
eboss_target2 | AUX | — | eBOSS, TDSS and SPIDERS target selection flags for main eBOSS survey | ✘ | ✔ |
eboss_target_id | AUX | — | EBOSS unique target identifier for every spectroscopic target | ✘ | ✔ |
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 |
---|---|---|---|---|---|
vdispz | AUX | — | Redshift associated with best-fit velocity dispersion | ✘ | ✔ |
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 | ✘ | ✔ |
rchi2 | AUX | — | Reduced chi-squared of best fit | ✘ | ✔ |
elodie_filename | AUX | — | File name for best-fit ELODIE star | ✘ | ✔ |
fracnsighi | AUX | — | Fraction of pixels high by more than N sigma relative to best-fit (for 1,2,..,10 sigma) | ✘ | ✔ |
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 | ✘ | ✔ |
deredsn2 | AUX | — | Dereddened overall signal-to-noise-squared measure for plate (only for BOSS spectrograph plates) | ✘ | ✔ |
elodie_z | AUX | — | Redshift fit to ELODIE star | ✘ | ✔ |
elodie_sptype | AUX | — | ELODIE star spectral type | ✘ | ✔ |
sectarget | AUX | — | Deprecated version of secondary (calibration) target flags (meanings highly overloaded) | ✘ | ✔ |
specsegue2 | AUX | — | Set to 1 for primary SDSS SEGUE-2 program observation of object, 0 otherwise | ✘ | ✔ |
subclass_noqso | AUX | — | Spectroscopic subclassification for Z_NOQSO redshift | ✘ | ✔ |
nturnoff | AUX | — | Number of stars used for SNTURNOFF determination | ✘ | ✔ |
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 |
---|---|---|---|---|---|
nturnoff | AUX | — | Number of stars used for SNTURNOFF determination | ✘ | ✔ |
objid | AUX | — | SDSS photometric object identification numbers (RUN, RERUN, CAMCOL, FIELD, ID) | ✘ | ✔ |
plate | AUX | — | Plate number (each plate corresponds to an actual plug plate) | ✘ | ✔ |
plateid | AUX | — | Unique database ID of plate based on PLATE, MJD, RUN2D (same as SkyServer version) | ✘ | ✔ |
platequality | AUX | — | Final quality of plate this spectrum came from (good, marginal, or bad) | ✘ | ✔ |
platerun | AUX | — | Drilling run that this plate was drilled in | ✘ | ✔ |
platesn2 | AUX | — | Overall signal-to-noise-squared measure for plate (only for SDSS spectrograph plates) | ✘ | ✔ |
primtarget | AUX | — | Target selection information at plate design, primary science selection (for backwards compatibility) | ✘ | ✔ |
programname | AUX | — | Program within each survey that the plate was part of | ✘ | ✔ |
rchi2 | AUX | — | Reduced chi-squared of best fit | ✘ | ✔ |
rchi2diff | AUX | — | Difference in reduced chi-squared between best and second best fit | ✘ | ✔ |
rchi2diff_noqso | AUX | — | Difference in reduced chi-squared between best and second best fit for Z_NOQSO redshift | ✘ | ✔ |
run1d | AUX | — | Spectroscopic 1D reduction (redshift and classification) name | ✘ | ✔ |
run2d | AUX | — | Spectroscopic 2D reduction (extraction of spectra) name | ✘ | ✔ |
sectarget | AUX | — | Deprecated version of secondary (calibration) target flags (meanings highly overloaded) | ✘ | ✔ |
segue1_target1 | AUX | — | Primary (science) target flags for SEGUE-1 targets | ✘ | ✔ |
segue1_target2 | AUX | — | Primary (science) target flags for SEGUE-1 targets | ✘ | ✔ |
segue2_target1 | AUX | — | Primary (science) target flags for SEGUE-2 targets | ✘ | ✔ |
segue2_target2 | AUX | — | Secondary (calibration) target flags for SEGUE-2 targets | ✘ | ✔ |
sn_median | AUX | — | Median signal-to-noise per pixel within each of the ugriz bandpasses | ✘ | ✔ |
sn_median_all | AUX | — | Median signal-to-noise per pixel across full spectrum | ✘ | ✔ |
snturnoff | AUX | — | Signal to noise measure for MS turnoff stars on plate (-9999 if not appropriate) | ✘ | ✔ |
sourcetype | AUX | — | String expressing type of source (similar to OBJTYPE in DR8 and earlier) | ✘ | ✔ |
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 | ✘ | ✔ |
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 | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
wave_sigma | SPECTRA | pixel | Line-spread function width (sigma of approximating Gaussian) in units of number of pixel | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |
sky | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Subtracted sky flux | ✘ | ✔ |
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit used for classification and redshift | ✘ | ✔ |
mask | SPECTRA | — | and_mask | ✘ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
subpriority | AUX | — | Random subpriority [0-1] to break assignment ties | ✘ | ✔ |
std_fiber_ra | AUX | arcsec | Standard deviation (over exposures) of RA of actual fiber position | ✘ | ✔ |
std_fiber_dec | AUX | arcsec | Standard deviation (over exposures) of DEC of actual fiber position | ✘ | ✔ |
spgrpval | AUX | — | Value corresponding to the grouping type indicated in the spgrp column. This is the same as the healpix column | ✘ | ✔ |
scnd_target | AUX | — | Target selection bitmask for secondary programs | ✘ | ✔ |
rms_delta_y | AUX | mm | RMS (over exposures) of the fiber difference between measured and requested CS5 Y location on focal plane | ✘ | ✔ |
rms_delta_x | AUX | mm | RMS (over exposures) of the fiber difference between measured and requested CS5 X location on focal plane | ✘ | ✔ |
ref_epoch | AUX | year | Reference epoch for Gaia/Tycho astrometry. Typically 2015.5 for Gaia | ✘ | ✔ |
program | AUX | — | DESI program type - BRIGHT, DARK, BACKUP, OTHER | ✘ | ✔ |
priority_init | AUX | — | Target initial priority from target selection bitmasks and OBSCONDITIONS | ✘ | ✔ |
pmra | AUX | mas year-1 | Reference catalog proper motion in the RA direction | ✘ | ✔ |
pmdec | AUX | mas year-1 | Reference catalog proper motion in the Dec direction | ✘ | ✔ |
plate_ra | AUX | deg | Right Ascension to be used by PlateMaker | ✘ | ✔ |
plate_dec | AUX | deg | Declination to be used by PlateMaker | ✘ | ✔ |
obsconditions | AUX | — | Bit-coded of allowed observing conditions | ✘ | ✔ |
objtype | AUX | — | Object type: TGT, SKY, NON, BAD | ✘ | ✔ |
numobs_init | AUX | — | Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS | ✘ | ✔ |
npixels | AUX | — | Number of unmasked wavelengths that contributed to the redshift fit | ✘ | ✔ |
ncoeff | AUX | — | Number of Redrock template coefficients | ✘ | ✔ |
mws_target | AUX | — | Milky Way Survey targeting bits | ✘ | ✔ |
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 | ✘ | ✔ |
mean_mjd | AUX | days | Mean (over exposures) of the Modified Julian Date (MJD) when the shutter was opened | ✘ | ✔ |
mean_fiber_ra | AUX | deg | Mean (over exposures) RA of actual fiber position | ✘ | ✔ |
mean_fiber_dec | AUX | deg | Mean (over exposures) DEC of actual fiber position | ✘ | ✔ |
mean_delta_y | AUX | mm | Mean (over exposures) fiber difference requested - actual CS5 Y location on focal plane | ✘ | ✔ |
Name | Storage | Units | Description | Default | All |
---|---|---|---|---|---|
wave_sigma | SPECTRA | AA | Line-spread function width (sigma of approximating Gaussian) in units of Angstroms | ✘ | ✔ |
wavelength | SPECTRA | AA | Wavelength in units of Angstroms | ✔ | ✔ |
model | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Pipeline best model fit | ✘ | ✔ |
mask | SPECTRA | — | Mask value | ✘ | ✔ |
ivar | SPECTRA | 1e+34 cm4 s2 AA2 erg-2 | Inverse variance of flux | ✘ | ✔ |
flux | SPECTRA | 1e-17 erg cm-2 s-1 AA-1 | Coadded calibrated flux | ✔ | ✔ |