| Summary: | The fiberassign file contains the fiber positioner configuration information for each exposure: what fiber is placed where, what target that is, etc. |
|---|---|
| Naming Convention: | fiberassign-TILEID.fits.gz, where TILEID is the zero-padded
6-digit tile ID. Some early versions were not compressed. |
| Regex: | fiberassign-[0-9]{6}\.fits\.gz |
| File Type: | FITS, 5 MB |
| Number | EXTNAME | Type | Contents |
|---|---|---|---|
| HDU0 | PRIMARY | IMAGE | Keywords only |
| HDU1 | FIBERASSIGN | BINTABLE | Target assignments for each fiber |
| HDU2 | SKY_MONITOR | BINTABLE | Sky location for the 20 sky monitor fibers used by the ETC |
| HDU3 | GFA_TARGETS | BINTABLE | Selected star for the ETC / GUIDE / FOCUS |
| HDU4 | TARGETS | BINTABLE | List of targets that are reachable by a positioner |
| HDU5 | POTENTIAL_ASSIGNMENTS | BINTABLE | All possible (TARGETID, FIBER, LOCATION) assignments |
EXTNAME = PRIMARY
No data, but some useful header keywords.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
============= ======================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================= ===== =======
KEY Example Value Type Comment
============= ======================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================= ===== =======
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
FAFLAVOR maindark str String composed of the SURVEY and the PROGRAM
DESIROOT /data/datasystems str DESI_ROOT environment variable path
GFA DESIROOT/target/catalogs/dr9/1.1.1/gfas str Path to the input GFA targets
MTL DESIROOT/survey/ops/surveyops/trunk/mtl/main/dark str Path to the primary targets ledgers
SCND DESIROOT/target/catalogs/dr9/1.1.1/targets/main/secondary/dark/targets-dark-secondary.fits str Path to the secondary targets static catalogs
SCND2 DESIROOT/target/catalogs/dr9/1.1.1/targets/main2/secondary/dark/main2targets-dark-secondary.fits str Path to the secondary targets static catalogs
SCNDMTL DESIROOT/survey/ops/surveyops/trunk/mtl/main/secondary/dark str Path to the secondary targets ledgers
SKY DESIROOT/target/catalogs/dr9/1.1.1/skies str Path to the sky targets
SKYSUPP DESIROOT/target/catalogs/gaiadr2/1.1.1/skies-supp str Path to the supp-sky targets
TARG DESIROOT/target/catalogs/dr9/1.1.1/targets/main/resolve/dark str Path to the primary targets static catalogs
TOO DESIROOT/survey/ops/surveyops/trunk/mtl/main/ToO/ToO.ecsv str Path to the Target-of-Opportunity catalog
FAARGS --doclean n --dr dr9 --dtver 1.1.1 --gaiadr gaiadr2 --goaltime 1000.0 --ha -6.72 --hdr_faprgrm dark --hdr_survey main --log_stdout False --lookup_sky_source ls --margin_gfa 0.4 --margin_petal 0.4 --margin_pos 0.05 --mintfrac 0.85 --mtltime 2022-01-13T18:13:09+00:00 --nosteps qa --pmcorr n --pmtime_utc_str 2022-01-14T10:13:28+00:00 --program DARK --rundate 2022-01-03T17:00:31+00:00 --sbprof ELG --sky_per_petal 40 --sky_per_slitblock 1 --standards_per_petal 10 --steps tiles,sky,gfa,targ,scnd,too,fa,zip,move,qa --survey main --svntiledir /data/tiles/SVN_tiles --tiledec -7.093 --tileid 4403 --tilera 170.239 --worldreadable True str fba_launch command arguments
OUTDIR /data/datasystems/target/fiberassign/holding_pen/ str Folder where the fba_launch outputs are written
SURVEY main str Survey of origin of the targets
NOWTIME 2022-01-14T10:13:28+00:00 str [UTC] Date of the fba_launch call
RUNDATE 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
PMCORR n str Is proper-motion correction applied for stars?
PMTIME 2022-01-14T10:13:28+00:00 str [UTC] Used current time, if proper-motion correction is applied
FAPRGRM dark str Program to which this tile belongs
MTLTIME 2022-01-13T18:13:09+00:00 str [UTC] Date used to read the ledgers
OBSCON DARK|GRAY|BRIGHT|BACKUP str Allowed observing conditions for this tile
GOALTIME 1000.0 float [s] Aimed EFFTIME_SPEC
GOALTYPE DARK str Sky conditions used for some noise estimation
EBVFAC 1.08401875659818 float 10.0 ** (2.165 * median(EBV) / 2.5))
SBPROF ELG str Source profile used for some noise estimation
MINTFRAC 0.85 float Fraction of GOALTIME to be reached by EFFTIME_SPEC to consider the tile has completed
FASCRIPT /software/datasystems/desiconda/20200924/code/fiberassign/5.4.0/bin/fba_launch str Path to the fba_launch used script
SVNDM 138481 str DESIMODEL/data svn revision number
SVNMTL 1083 str DESI_SURVEYOPS/mtl svn revision number
LKSKYSRC [1]_ ls str Photometric survey used for the sky look-up table for the stuck fibers
============= ======================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================================= ===== =======
| [1] | Optional |
Empty HDU.
EXTNAME = FIBERASSIGN
The target assignments for each fiber of this tile.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ========================= ===== =======================
KEY Example Value Type Comment
======== ========================= ===== =======================
NAXIS1 293 int width of table in bytes
NAXIS2 5000 int number of rows in table
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
======== ========================= ===== =======================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| TARGETID | int64 | Unique target ID | |
| PETAL_LOC | int16 | Petal location [0-9] | |
| DEVICE_LOC | int32 | Device location on focal plane [0-523] | |
| LOCATION | int32 | Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC | |
| FIBER | int32 | Fiber ID on the CCDs [0-4999] | |
| FIBERSTATUS | int32 | Fiber status mask; 0=good | |
| TARGET_RA | float64 | deg | Target Right Ascension |
| TARGET_DEC | float64 | deg | Target Declination |
| PMRA | float32 | mas/yr | Proper motion in the RA direction (already including cosDEC term) |
| PMDEC | float32 | mas/yr | Proper motion in the DEC direction |
| REF_EPOCH | float32 | yr | Reference catalog reference epoch (eg, 2015.5 for Gaia DR2) |
| LAMBDA_REF | float32 | Angstrom | Wavelength at which targets should be centered on fibers |
| FA_TARGET | int64 | Targeting bit internally used by fiberassign (linked with FA_TYPE) | |
| FA_TYPE | binary | Target type (science, standard, sky, safe, suppsky) | |
| OBJTYPE | char[3] | TGT, SKY, BAD, empty | |
| FIBERASSIGN_X | float32 | mm | Expected CS5 X location on focal plane |
| FIBERASSIGN_Y | float32 | mm | Expected CS5 Y location on focal plane |
| PRIORITY | int32 | Assignment priority; larger = higher priority | |
| SUBPRIORITY | float64 | Assignment subpriority [0-1] | |
| OBSCONDITIONS | int32 | Bit-coded of allowed observing conditions | |
| RELEASE | int16 | Imaging release number | |
| BRICKNAME | char[8] | Imaging Surveys brick name | |
| BRICKID | int32 | Imaging Surveys brick ID | |
| BRICK_OBJID | int32 | Imaging surveys OBJID on that brick | |
| MORPHTYPE | char[4] | Imaging surveys morphological type | |
| EBV | float32 | mag | Galactic extinction E(B-V) reddening |
| FLUX_G | float32 | nanomaggy | Flux in g-band |
| FLUX_R | float32 | nanomaggy | Flux in r-band |
| FLUX_Z | float32 | nanomaggy | Flux in z-band |
| FLUX_W1 | float32 | nanomaggy | Flux in WISE W1-band |
| FLUX_W2 | float32 | nanomaggy | Flux in WISE W2-band |
| FLUX_IVAR_G | float32 | nanomaggy^-2 | Inverse variance of FLUX_G |
| FLUX_IVAR_R | float32 | nanomaggy^-2 | Inverse variance of FLUX_R |
| FLUX_IVAR_Z | float32 | nanomaggy^-2 | Inverse variance of FLUX_Z |
| FLUX_IVAR_W1 | float32 | nanomaggy^-2 | Inverse variance of FLUX_W1 |
| FLUX_IVAR_W2 | float32 | nanomaggy^-2 | Inverse variance of FLUX_W2 |
| FIBERFLUX_G | float32 | nanomaggy | g-band object model flux for 1 arcsec seeing and 1.5 arcsec diameter fiber |
| FIBERFLUX_R | float32 | nanomaggy | r-band object model flux for 1 arcsec seeing and 1.5 arcsec diameter fiber |
| FIBERFLUX_Z | float32 | nanomaggy | z-band object model flux for 1 arcsec seeing and 1.5 arcsec diameter fiber |
| FIBERTOTFLUX_G | float32 | nanomaggy | like FIBERFLUX_G but including all objects overlapping this location |
| FIBERTOTFLUX_R | float32 | nanomaggy | like FIBERFLUX_R but including all objects overlapping this location |
| FIBERTOTFLUX_Z | float32 | nanomaggy | like FIBERFLUX_Z but including all objects overlapping this location |
| MASKBITS | int16 | Bitwise mask from the imaging indicating potential issue or blending | |
| SERSIC | float32 | Power-law index for the Sersic profile model | |
| SHAPE_R | float32 | arcsec | Half-light radius of galaxy model for galaxy type |
| SHAPE_E1 | float32 | Ellipticity component 1 of galaxy model for galaxy type | |
| SHAPE_E2 | float32 | Ellipticity component 2 of galaxy model for galaxy type | |
| REF_ID | int64 | Astrometric catalog reference ID (SOURCE_ID from Gaia and SGA; built from TYC1, TYC2, TYC3 for Tycho2) | |
| REF_CAT | char[2] | Reference catalog source for this star | |
| GAIA_PHOT_G_MEAN_MAG | float32 | mag | Gaia G band mag |
| GAIA_PHOT_BP_MEAN_MAG | float32 | mag | Gaia BP mag |
| GAIA_PHOT_RP_MEAN_MAG | float32 | mag | Gaia RP mag |
| PARALLAX | float32 | mas | Reference catalog parallax |
| PHOTSYS | char[1] | 'N' for the MzLS/BASS photometric system, 'S' for DECaLS, 'G' for Gaia, '' for stuck/broken fibers | |
| PRIORITY_INIT | int64 | Initial priority for target calculated across target selection bitmasks and OBSCONDITIONS | |
| NUMOBS_INIT | int64 | Initial number of observations for target calculated across target selection bitmasks and OBSCONDITIONS | |
| DESI_TARGET | int64 | Dark survey + calibration bitmask | |
| BGS_TARGET | int64 | Bright Galaxy Survey bitmask | |
| MWS_TARGET | int64 | Milky Way Survey bitmask | |
| SCND_TARGET | int64 | Secondary programs bitmask | |
| PLATE_RA | float64 | deg | Right Ascension to be used by PlateMaker |
| PLATE_DEC | float64 | deg | Declination to be used by PlateMaker |
EXTNAME = SKY_MONITOR
Blank sky assignments for sky monitor positioners.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ========================= ===== =======================
KEY Example Value Type Comment
======== ========================= ===== =======================
NAXIS1 99 int width of table in bytes
NAXIS2 20 int number of rows in table
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
======== ========================= ===== =======================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| FIBER | int32 | Fiber ID on the CCDs [0-4999] | |
| LOCATION | int32 | Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC | |
| TARGETID | int64 | Unique target ID | |
| BRICKID | int32 | Imaging Surveys brick ID | |
| BRICK_OBJID | int32 | Imaging surveys OBJID on that brick | |
| FA_TARGET | int64 | Targeting bit internally used by fiberassign (linked with FA_TYPE) | |
| FA_TYPE | binary | Target type (science, standard, sky, safe, suppsky) | |
| TARGET_RA | float64 | deg | Target Right Ascension |
| TARGET_DEC | float64 | deg | Target Declination |
| FIBERASSIGN_X | float32 | mm | Expected CS5 X location on focal plane |
| FIBERASSIGN_Y | float32 | mm | Expected CS5 Y location on focal plane |
| BRICKNAME | char[8] | Imaging Surveys brick name | |
| FIBERSTATUS | int32 | Fiber status mask; 0=good | |
| PETAL_LOC | int16 | Petal location [0-9] | |
| DEVICE_LOC | int32 | Device location on focal plane [0-523] | |
| PRIORITY | int32 | Assignment priority; larger = higher priority | |
| SUBPRIORITY | float64 | Assignment subpriority [0-1] | |
| FIBERFLUX_G | float32 | nanomaggy | Flux in g-band |
| FIBERFLUX_R | float32 | nanomaggy | Flux in r-band |
| FIBERFLUX_Z | float32 | nanomaggy | Flux in z-band |
EXTNAME = GFA_TARGETS
GFA stars to be used by the ETC / GUIDE / FOCUS
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ========================= ===== =======================
KEY Example Value Type Comment
======== ========================= ===== =======================
NAXIS1 172 int width of table in bytes
NAXIS2 988 int number of rows in table
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
======== ========================= ===== =======================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| RELEASE | int32 | Imaging release number | |
| TARGETID | int64 | Unique target ID | |
| BRICKID | int32 | Imaging Surveys brick ID | |
| BRICK_OBJID | int32 | Imaging surveys OBJID on that brick | |
| TARGET_RA | float64 | deg | Target Right Ascension |
| TARGET_DEC | float64 | deg | Target Declination |
| TARGET_RA_IVAR | float32 | deg^-2 | Inverse variance of TARGET_RA |
| TARGET_DEC_IVAR | float32 | deg^-2 | Inverse variance of TARGET_DEC |
| MORPHTYPE | char[4] | Imaging surveys morphological type | |
| MASKBITS | int16 | Bitwise mask from the imaging indicating potential issue or blending | |
| FLUX_G | float32 | nanomaggy | Flux in g-band |
| FLUX_R | float32 | nanomaggy | Flux in r-band |
| FLUX_Z | float32 | nanomaggy | Flux in z-band |
| FLUX_IVAR_G | float32 | nanomaggy^-2 | Inverse variance of FLUX_G |
| FLUX_IVAR_R | float32 | nanomaggy^-2 | Inverse variance of FLUX_R |
| FLUX_IVAR_Z | float32 | nanomaggy^-2 | Inverse variance of FLUX_Z |
| REF_ID | int64 | Astrometric catalog reference ID (SOURCE_ID from Gaia and SGA; built from TYC1, TYC2, TYC3 for Tycho2) | |
| REF_CAT | char[2] | Reference catalog source for this star | |
| REF_EPOCH | float32 | yr | Reference catalog reference epoch |
| PARALLAX | float32 | mas | Reference catalog parallax |
| PARALLAX_IVAR | float32 | mas^-2 | Inverse variance of PARALLAX |
| PMRA | float32 | mas/yr | Proper motion in the RA direction (already including cosDEC term) |
| PMDEC | float32 | mas/yr | Proper motion in the DEC direction |
| PMRA_IVAR | float32 | yr^2/mas^2 | Inverse variance of PMRA |
| PMDEC_IVAR | float32 | yr^2/mas^2 | Inverse variance of PMDEC |
| GAIA_PHOT_G_MEAN_MAG | float32 | mag | Gaia G band mag |
| GAIA_PHOT_G_MEAN_FLUX_OVER_ERROR | float32 | Gaia G band signal-to-noise | |
| GAIA_PHOT_BP_MEAN_MAG | float32 | mag | Gaia BP band mag |
| GAIA_PHOT_BP_MEAN_FLUX_OVER_ERROR | float32 | Gaia BP signal-to-noise | |
| GAIA_PHOT_RP_MEAN_MAG | float32 | mag | Gaia RP band mag |
| GAIA_PHOT_RP_MEAN_FLUX_OVER_ERROR | float32 | Gaia RP signal-to-noise | |
| GAIA_ASTROMETRIC_EXCESS_NOISE | float32 | Gaia astrometric excess noise | |
| URAT_ID | int64 | URAT ID | |
| URAT_SEP | float32 | arcsec | Distance separation to the URAT coordinates |
| GAIA_PHOT_G_N_OBS | int32 | Gaia G band number of observations | |
| HPXPIXEL | int64 | HEALPixel containing GFA target | |
| GFA_LOC | int16 | Covered GFA identifier | |
| GUIDE_FLAG | int16 | GUIDING bitmask | |
| FOCUS_FLAG | int16 | FOCUS bitmask | |
| ETC_FLAG | int16 | ETC bitmask |
EXTNAME = TARGETS
Unique list of targets reachable by a positioner.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ========================= ===== =======================
KEY Example Value Type Comment
======== ========================= ===== =======================
NAXIS1 81 int width of table in bytes
NAXIS2 152687 int number of rows in table
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
======== ========================= ===== =======================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| TARGETID | int64 | Unique target ID | |
| RA | float64 | deg | Target Right Ascension |
| DEC | float64 | deg | Target Declination |
| FA_TARGET | int64 | Targeting bit internally used by fiberassign (linked with FA_TYPE) | |
| FA_TYPE | binary | Target type (science, standard, sky, safe, suppsky) | |
| PRIORITY | int32 | Assignment priority; larger = higher priority | |
| SUBPRIORITY | float64 | Assignment subpriority [0-1] | |
| OBSCONDITIONS | int32 | Bit-coded of allowed observing conditions | |
| DESI_TARGET | int64 | Dark survey + calibration bitmask | |
| BGS_TARGET | int64 | Bright Galaxy Survey bitmask | |
| MWS_TARGET | int64 | Milky Way Survey bitmask | |
| SCND_TARGET | int64 | Secondary programs bitmask |
EXTNAME = POTENTIAL_ASSIGNMENTS
A list of targets that could have been assigned to each fiber.
.. collapse:: Required Header Keywords Table
.. rst-class:: keywords
======== ========================= ===== =======================
KEY Example Value Type Comment
======== ========================= ===== =======================
NAXIS1 16 int width of table in bytes
NAXIS2 169775 int number of rows in table
TILEID 4403 int Tile ID
TILERA 170.239 float [deg] Tile Right Ascension
TILEDEC -7.093 float [deg] Tile Declination
FIELDROT 0.0210480650645507 float [deg] Field rotation
FA_PLAN 2022-07-01T00:00:00.000 str [UTC] Plan field rotations for this date
FA_HA -6.72 float [deg] Design Hour Angle
FA_RUN 2022-01-03T17:00:31+00:00 str [UTC] Date of the loaded Focal Plane state
FA_M_GFA 0.4 float [mm] Margin around GFA keep-out polygons
FA_M_PET 0.4 float [mm] Margin around petal-boundary keep-out polygons
FA_M_POS 0.05 float [mm] Margin around positioner keep-out polygons
REQRA 170.239 float [deg] Tile Right Ascension
REQDEC -7.093 float [deg] Tile Declination
FIELDNUM 0 int Not used, always zero
FA_VER 5.4.0 str Fiberassign code version
FA_SURV main str Survey of origin of the targets
======== ========================= ===== =======================
.. rst-class:: columns
| Name | Type | Units | Description |
|---|---|---|---|
| TARGETID | int64 | Unique target ID | |
| FIBER | int32 | Fiber ID on the CCDs [0-4999] | |
| LOCATION | int32 | Location on the focal plane PETAL_LOC*1000 + DEVICE_LOC |
For the SURVEY=cmx m33 tile (TILEID=80615) tile and all the SURVEY=sv1 tiles (except TILEID=80971-80976, the dc3r2 ones), proper-motion correction was applied at the :doc:`fiberassign </DESI_TARGET/fiberassign/tiles/TILES_VERSION/TILEXX/fiberassign-TILEID>` design step; thus the following columns can have different values than in the :doc:`desitarget products </DESI_TARGET/TARG_DIR/DR/VERSION/targets/PHASE/RESOLVE/OBSCON/PHASEtargets-OBSCON-RESOLVE-hp-HP>`: TARGET_RA, TARGET_DEC, REF_EPOCH, PLATE_RA, PLATE_DEC, and PLATE_REF_EPOCH.
- HDU0: early tiles may have some missing keywords from the listed ones.
- HDU1: this table defines the requested fiber assignments; see :doc:`fibermap-EXPID <../../../../../DESI_SPECTRO_DATA/NIGHT/EXPID/fibermap-EXPID>` for the actual observed assignments.
- HDU1:
LAMBDA_REF: 5400 so far, not used for fiber positioning. - HDU1, HDU4, HDU5: files built from CMX, SV1, SV2, or SV3 targets will have a slightly different column content for the targetings bit columns (e.g.,
CMX_TARGET,SV1_DESI_TARGET). - HDU2:
BRICKID,BRICK_OBJID,FA_TARGET,BRICKNAME,PRIORITY,SUBPRIORITY,FIBERFLUX_G,FIBERFLUX_R,FIBERFLUX_Zmostly are a zero value (and an empty string forBRICKNAME). - HDU3: for objects that do not have a match in URAT, the
URAT_IDandURAT_SEPcolumns are -1. - HDU5: the same target can appear more than once if it is reachable by more than one fiber.