.. _fastspec datamodel: =================== Fastspec Data Model =================== :Summary: Spectrophotometric fitting results. :Naming Convention: ``fastspec-SURVEY-PROGRAM-HEALPIX.fits.gz``, where ``SURVEY`` is the survey name (e.g., *main* or *sv3*), ``PROGRAM`` is the program name (e.g., *bright* or *dark*), and ``HEALPIX`` is the healpixel number. :Regex: ``fastspec-(cmx|main|special|sv1|sv2|sv3)-(backup|bright|dark|other)-[0-9]+\.fits.gz`` :File Type: FITS Contents ======== ====== ============ ======== ====================== Number EXTNAME Type Contents ====== ============ ======== ====================== HDU00_ PRIMARY IMAGE Keywords only. HDU01_ METADATA BINTABLE Table with sample metadata. HDU02_ SPECPHOT BINTABLE Table with spectrophotometric quantities. HDU03_ FASTSPEC BINTABLE Table with spectral fitting results. HDU04_ MODELS IMAGE Model continuum, smooth continuum, and emission-line spectra. ====== ============ ======== ====================== FITS Header Units ================= HDU00 ----- EXTNAME = PRIMARY Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. dropdown:: Required Header Keywords Table :open: .. rst-class:: keywords ======== ================ ===== ============================================== KEY Example Value Type Comment ======== ================ ===== ============================================== SPECPROD iron str Spectroscopic production name. COADDTYP healpix str Type of spectral coadd (healpix|cumulative|pernight|perexp). INPUTZ F bool Input redshifts provided. INPUTS F bool Input seeds provided. CONSAGE F bool Stellar population synthesis ages constrained by redshift. USEQNET T bool QuasarNet redshifts used where applicable. NMONTE 50 int Number of Monte Carlo realizations. SEED 1 int Random seed used for Monte Carlo realizations. NOSCORR F bool No smooth continuum correction derived. NOPHOTO F bool No fitting to photometry carried out. BRDLFIT T bool Broad Balmer emission-line modeling attempted. UFLOOR 0.01 float Spectroscopic fractional uncertainty floor. SNRBBALM 2.5 float Minimum broad Balmer signal-to-noise ratio. CHECKSUM ZHWHZHVFZHVFZHVF str HDU checksum updated 2022-08-02T19:06:22 DATASUM 0 str data unit checksum updated 2022-08-02T19:06:22 ======== ================ ===== ============================================== Empty HDU. HDU01 ----- EXTNAME = METADATA Metadata associated with each object fitted. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. dropdown:: Required Header Keywords Table :open: .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 339 int length of dimension 1 NAXIS2 338 int length of dimension 2 CHECKSUM hFY6jCV3hCV3hCV3 str HDU checksum updated 2022-08-03T14:25:08 DATASUM 1759692941 str data unit checksum updated 2022-08-03T14:25:08 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ====================== =========== ========== ========================================== Name Type Units Description ====================== =========== ========== ========================================== TARGETID int64 Unique target ID. SURVEY [1]_ bytes3 Survey name. PROGRAM [1]_ bytes6 Program name. HEALPIX [1]_ int32 Healpixel number. TILEID [2]_ int32 Tile ID number. FIBER [2]_ int32 Fiber number. NIGHT [2]_ int32 Night of observation. EXPID [3]_ int32 Exposure ID number. TILEID_LIST str? List of tile IDs that went into healpix coadd. RA float64 deg Right ascension from target catalog. DEC float64 deg Declination from target catalog. COADD_FIBERSTATUS int64 Fiber status bit. CMX_TARGET [5]_ int64 Commissioning (CMX) targeting bit. DESI_TARGET int64 DESI targeting bit. BGS_TARGET int64 BGS targeting bit. MWS_TARGET int64 MWS targeting bit. SCND_TARGET int64 Secondary target targeting bit. SV1_DESI_TARGET [5]_ int64 SV1 DESI targeting bit. SV1_BGS_TARGET [5]_ int64 SV1 BGS targeting bit. SV1_MWS_TARGET [5]_ int64 SV1 MWS targeting bit. SV2_DESI_TARGET [5]_ int64 SV2 DESI targeting bit. SV2_BGS_TARGET [5]_ int64 SV2 BGS targeting bit. SV2_MWS_TARGET [5]_ int64 SV2 MWS targeting bit. SV3_DESI_TARGET [5]_ int64 SV3 DESI targeting bit. SV3_BGS_TARGET [5]_ int64 SV3 BGS targeting bit. SV3_MWS_TARGET [5]_ int64 SV3 MWS targeting bit. SV1_SCND_TARGET [5]_ int64 SV1 secondary targeting bit. SV2_SCND_TARGET [5]_ int64 SV2 secondary targeting bit. SV3_SCND_TARGET [5]_ int64 SV3 secondary targeting bit. Z float64 Redshift based on either Redrock or QuasarNet (for QSO targets only). ZWARN int8 Redshift zwarning bit based on either Redrock or QuasarNet (for QSO targets only). DELTACHI2 float64 Redrock delta-chi-squared. SPECTYPE str6 Redrock spectral classification type. SUBTYPE str20 Redrock spectral subtype. Z_RR float64 Redrock redshift. ZWARN_RR int8 Redrock zwarning bit. TSNR2_BGS float32 Template signal-to-noise ratio squared for BGS targets. TSNR2_LRG float32 Like TSNR2_BGS but for LRG targets. TSNR2_ELG float32 Like TSNR2_BGS but for ELG targets. TSNR2_QSO float32 Like TSNR2_BGS but for QSO targets. TSNR2_LYA float32 Like TSNR2_BGS but for LYA targets. PHOTSYS str1 Photometric system (*N* or *S*). LS_ID int64 Unique Legacy Surveys identification number. FIBERFLUX_G float32 nmgy Fiber *g*-band flux corrected for Galactic extinction. FIBERFLUX_R float32 nmgy Like FIBERFLUX_G but for the *r*-band. FIBERFLUX_Z float32 nmgy Like FIBERFLUX_G but for the *z*-band. FIBERTOTFLUX_G float32 nmgy Fibertot *g*-band flux corrected for Galactic extinction. FIBERTOTFLUX_R float32 nmgy Like FIBERTOTFLUX_G but for the *r*-band. FIBERTOTFLUX_Z float32 nmgy Like FIBERTOTFLUX_G but for the *z*-band. FLUX_G float32 nmgy Total *g*-band flux corrected for Galactic extinction. FLUX_R float32 nmgy Like FLUX_G but for the *r*-band. FLUX_Z float32 nmgy Like FLUX_G but for the *z*-band. FLUX_W1 float32 nmgy Like FLUX_G but for the *W1*-band. FLUX_W2 float32 nmgy Like FLUX_G but for the *W2*-band. FLUX_W3 float32 nmgy Like FLUX_G but for the *W3*-band. FLUX_W4 float32 nmgy Like FLUX_G but for the *W4*-band. FLUX_IVAR_G float32 1 / nmgy2 Inverse variance of FLUX_G corrected for Galactic extinction. FLUX_IVAR_R float32 1 / nmgy2 Like FLUX_IVAR_G but for the *r*-band. FLUX_IVAR_Z float32 1 / nmgy2 Like FLUX_IVAR_G but for the *z*-band. FLUX_IVAR_W1 float32 1 / nmgy2 Like FLUX_IVAR_G but for the *W1*-band. FLUX_IVAR_W2 float32 1 / nmgy2 Like FLUX_IVAR_G but for the *W2*-band. FLUX_IVAR_W3 float32 1 / nmgy2 Like FLUX_IVAR_G but for the *W3*-band. FLUX_IVAR_W4 float32 1 / nmgy2 Like FLUX_IVAR_G but for the *W4*-band. EBV float32 mag Milky Way foreground color excess. MW_TRANSMISSION_G float32 Milky Way foreground dust transmission factor [0-1] in the *g*-band. MW_TRANSMISSION_R float32 Like MW_TRANSMISSION_G but for the *r*-band. MW_TRANSMISSION_Z float32 Like MW_TRANSMISSION_G but for the *z*-band. MW_TRANSMISSION_W1 float32 Like MW_TRANSMISSION_G but for the *W1*-band. MW_TRANSMISSION_W2 float32 Like MW_TRANSMISSION_G but for the *W2*-band. MW_TRANSMISSION_W3 float32 Like MW_TRANSMISSION_G but for the *W3*-band. MW_TRANSMISSION_W4 float32 Like MW_TRANSMISSION_G but for the *W4*-band. ====================== =========== ========== ========================================== HDU02 ----- EXTNAME = SPECPHOT Table with spectrophotometric quantities. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. dropdown:: Required Header Keywords Table :open: .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 3115 int length of dimension 1 NAXIS2 338 int length of dimension 2 CHECKSUM WLDnaKDlWKDlaKDl str HDU checksum updated 2022-08-03T14:25:08 DATASUM 756558178 str data unit checksum updated 2022-08-03T14:25:08 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns ============================= ============ ============================= ============================================ Name Type Units Description ============================= ============ ============================= ============================================ TARGETID int64 Unique target ID. SURVEY [1]_ bytes3 Survey name. PROGRAM [1]_ bytes6 Program name. HEALPIX [1]_ int32 Healpixel number. TILEID [2]_ int32 Tile ID number. NIGHT [2]_ int32 Night of observation. FIBER [2]_ int32 Fiber number. EXPID [3]_ int32 Exposure ID number. SEED int64 Random seed used for Monte Carlo realizations. COEFF float32[5] 1e-17 erg / (Angstrom cm2 s) Stellar continuum coefficients. RCHI2 float32 Reduced chi-squared of the full-spectrophotometric fit. RCHI2_LINE float32 Reduced chi-squared of the emission-line model fit. RCHI2_CONT float32 Reduced chi-squared of the fit to the stellar continuum. RCHI2_PHOT float32 Reduced chi-squared of the fit to the broadband photometry. VDISP float32 km / s Stellar velocity dispersion. VDISP_IVAR float32 s2 / km2 Inverse variance of VDISP. TAUV float32 *V*-band dust optical depth of the integrated stellar population. TAUV_IVAR float32 Inverse variance of TAUV. AGE float32 Gyr Light-weighted age. AGE_IVAR float32 1 / Gyr2 Inverse variance of AGE. ZZSUN float32 Logarithmic stellar metallicity relative to solar. ZZSUN_IVAR float32 Inverse variance of ZZSUN. LOGMSTAR float32 Msun Logarithmic stellar mass (h=1.0, Chabrier+2003 initial mass function). LOGMSTAR_IVAR float32 1 / Msun2 Inverse variance of LOGMSTAR. SFR float32 Msun / yr Instantaneous star formation rate (h=1.0, Chabrier+2003 initial mass function). SFR_IVAR float32 yr2 / Msun2 Inverse variance of SFR. DN4000 float32 Narrow 4000-A break index (from Balogh et al. 1999) measured from the emission-line subtracted spectrum. DN4000_OBS float32 Narrow 4000-A break index measured from the observed spectrum. DN4000_IVAR float32 Inverse variance of DN4000_OBS and of DN4000. DN4000_MODEL float32 Narrow 4000-A break index measured from the best-fitting continuum model. DN4000_MODEL_IVAR float32 Inverse variance of DN4000_MODEL. FLUX_SYNTH_G float32 nmgy *g*-band flux (in the PHOTSYS photometric system) synthesized from the observed spectrum. FLUX_SYNTH_R float32 nmgy Like FLUX_SYNTH_G but for the *r*-band. FLUX_SYNTH_Z float32 nmgy Like FLUX_SYNTH_G but for the *z*-band. FLUX_SYNTH_SPECMODEL_G float32 nmgy *g*-band flux (in the PHOTSYS photometric system) synthesized from the best-fitting spectroscopic model. FLUX_SYNTH_SPECMODEL_R float32 nmgy Like FLUX_SYNTH_SPECMODEL_G but in the *r*-band. FLUX_SYNTH_SPECMODEL_Z float32 nmgy Like FLUX_SYNTH_SPECMODEL_G but in the *z*-band. FLUX_SYNTH_PHOTMODEL_G float32 nmgy *g*-band flux (in the PHOTSYS photometric system) synthesized from the best-fitting photometric continuum model. FLUX_SYNTH_PHOTMODEL_R float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *r*-band. FLUX_SYNTH_PHOTMODEL_Z float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *z*-band. FLUX_SYNTH_PHOTMODEL_W1 float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *W1*-band. FLUX_SYNTH_PHOTMODEL_W2 float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *W2*-band. FLUX_SYNTH_PHOTMODEL_W3 float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *W3*-band. FLUX_SYNTH_PHOTMODEL_W4 float32 nmgy Like FLUX_SYNTH_PHOTMODEL_G but in the *W4*-band. ABSMAG10_DECAM_G [4]_ float32 mag Absolute magnitude in DECam *g*-band band-shifted to z=1.0 assuming h=1.0. ABSMAG10_IVAR_DECAM_G float32 1 / mag2 Inverse variance corresponding to ABSMAG10_DECAM_G. ABSMAG10_SYNTH_DECAM_G float32 mag Synthesized absolute magnitude in DECam *g*-band band-shifted to z=1.0 assuming h=1.0. ABSMAG10_SYNTH_IVAR_DECAM_G float32 1 / mag2 Inverse variance corresponding to ABSMAG10_SYNTH_DECAM_G. ABSMAG10_DECAM_R [4]_ float32 mag Like ABSMAG10_DECAM_G but for DECam *r*-band. ABSMAG10_IVAR_DECAM_R float32 1 / mag2 Like ABSMAG10_IVAR_DECAM_G but for DECam *r*-band. ABSMAG10_SYNTH_DECAM_R float32 mag Like ABSMAG10_SYNTH_DECAM_G but for DECam *r*-band. ABSMAG10_SYNTH_IVAR_DECAM_R float32 1 / mag2 Like ABSMAG10_SYNTH_IVAR_DECAM_G but for DECam *r*-band. ABSMAG10_DECAM_Z [4]_ float32 mag Like ABSMAG10_DECAM_G but for DECam *z*-band. ABSMAG10_IVAR_DECAM_Z float32 1 / mag2 Like ABSMAG10_IVAR_DECAM_G but for DECam *z*-band. ABSMAG10_SYNTH_DECAM_Z float32 mag Like ABSMAG10_SYNTH_DECAM_G but for DECam *z*-band. ABSMAG10_SYNTH_IVAR_DECAM_Z float32 1 / mag2 Like ABSMAG10_SYNTH_IVAR_DECAM_G but for DECam *z*-band. ABSMAG00_U [4]_ float32 mag Absolute magnitude in Johnson/Cousins *U*-band band-shifted to z=0.0 assuming h=1.0. ABSMAG00_IVAR_U float32 1 / mag2 Inverse variance corresponding to ABSMAG00_U. ABSMAG00_SYNTH_U float32 mag Synthesized absolute magnitude in Johnson/Cousins *U*-band band-shifted to z=0.0 assuming h=1.0. ABSMAG00_SYNTH_IVAR_U float32 1 / mag2 Inverse variance corresponding to ABSMAG00_SYNTH_U. ABSMAG00_B [4]_ float32 mag Like ABSMAG00_U but for Johnson/Cousins *B*-band. ABSMAG00_IVAR_B float32 1 / mag2 Like ABSMAG00_IVAR_U but for Johnson/Cousins *B*-band. ABSMAG00_SYNTH_B float32 mag Like ABSMAG00_SYNTH_U but for Johnson/Cousins *B*-band. ABSMAG00_SYNTH_IVAR_B float32 1 / mag2 Like ABSMAG00_SYNTH_IVAR_U but for Johnson/Cousins *B*-band. ABSMAG00_V [4]_ float32 mag Like ABSMAG00_U but for Johnson/Cousins *V*-band. ABSMAG00_IVAR_V float32 1 / mag2 Like ABSMAG00_IVAR_U but for Johnson/Cousins *V*-band. ABSMAG00_SYNTH_V float32 mag Like ABSMAG00_SYNTH_U but for Johnson/Cousins *V*-band. ABSMAG00_SYNTH_IVAR_V float32 1 / mag2 Like ABSMAG00_SYNTH_IVAR_U but for Johnson/Cousins *V*-band. ABSMAG00_TWOMASS_J [4]_ float32 mag Absolute magnitude in 2MASS *J*-band band-shifted to z=0.0 assuming h=1.0. ABSMAG00_IVAR_TWOMASS_J float32 1 / mag2 Inverse variance corresponding to ABSMAG00_TWOMASS_J. ABSMAG00_SYNTH_TWOMASS_J float32 mag Synthesized absolute magnitude in 2MASS *J*-band band-shifted to z=0.0 assuming h=1.0. ABSMAG00_SYNTH_IVAR_TWOMASS_J float32 1 / mag2 Inverse variance corresponding to ABSMAG01_SYNTH_TWOMASS_J. ABSMAG01_SDSS_U [4]_ float32 mag Absolute magnitude in SDSS *u*-band band-shifted to z=0.1 assuming h=1.0. ABSMAG01_IVAR_SDSS_U float32 1 / mag2 Inverse variance corresponding to ABSMAG01_SDSS_U. ABSMAG01_SYNTH_SDSS_U float32 mag Synthesized absolute magnitude in SDSS *u*-band band-shifted to z=0.1 assuming h=1.0. ABSMAG01_SYNTH_IVAR_SDSS_U float32 1 / mag2 Inverse variance corresponding to ABSMAG01_SYNTH_SDSS_U. ABSMAG01_SDSS_G [4]_ float32 mag Like ABSMAG01_SDSS_U but for SDSS *g*-band. ABSMAG01_IVAR_SDSS_G float32 1 / mag2 Like ABSMAG01_IVAR_SDSS_U but for SDSS *g*-band. ABSMAG01_SYNTH_SDSS_G float32 mag Like ABSMAG01_SYNTH_SDSS_U but for SDSS *g*-band. ABSMAG01_SYNTH_IVAR_SDSS_G float32 1 / mag2 Like ABSMAG01_SYNTH_IVAR_SDSS_U but for SDSS *g*-band. ABSMAG01_SDSS_R [4]_ float32 mag Like ABSMAG01_SDSS_U but for SDSS *r*-band. ABSMAG01_IVAR_SDSS_R float32 1 / mag2 Like ABSMAG01_IVAR_SDSS_U but for SDSS *r*-band. ABSMAG01_SYNTH_SDSS_R float32 mag Like ABSMAG01_SYNTH_SDSS_U but for SDSS *r*-band. ABSMAG01_SYNTH_IVAR_SDSS_R float32 1 / mag2 Like ABSMAG01_SYNTH_IVAR_SDSS_U but for SDSS *r*-band. ABSMAG01_SDSS_I [4]_ float32 mag Like ABSMAG01_SDSS_U but for SDSS *i*-band. ABSMAG01_IVAR_SDSS_I float32 1 / mag2 Like ABSMAG01_IVAR_SDSS_U but for SDSS *i*-band. ABSMAG01_SYNTH_SDSS_I float32 mag Like ABSMAG01_SYNTH_SDSS_U but for SDSS *i*-band. ABSMAG01_SYNTH_IVAR_SDSS_I float32 1 / mag2 Like ABSMAG01_SYNTH_IVAR_SDSS_U but for SDSS *i*-band. ABSMAG01_SDSS_Z [4]_ float32 mag Like ABSMAG01_SDSS_U but for SDSS *z*-band. ABSMAG01_IVAR_SDSS_Z float32 1 / mag2 Like ABSMAG01_IVAR_SDSS_U but for SDSS *z*-band. ABSMAG01_SYNTH_SDSS_Z float32 mag Like ABSMAG01_SYNTH_SDSS_U but for SDSS *z*-band. ABSMAG01_SYNTH_IVAR_SDSS_Z float32 1 / mag2 Like ABSMAG01_SYNTH_IVAR_SDSS_U but for SDSS *z*-band. ABSMAG01_W1 [4]_ float32 mag Absolute magnitude in WISE *W1*-band band-shifted to z=0.1 assuming h=1.0. ABSMAG01_IVAR_W1 float32 1 / mag2 Inverse variance corresponding to ABSMAG01_W1. ABSMAG01_SYNTH_W1 float32 mag Synthesized absolute magnitude in WISE *W1*-band band-shifted to z=0.1 assuming h=1.0. ABSMAG01_SYNTH_IVAR_W1 float32 1 / mag2 Inverse variance corresponding to ABSMAG01_SYNTH_W1. KCORR10_DECAM_G float32 mag K-correction used to derive ABSMAG10_DECAM_G band-shifted to z=1.0. KCORR10_DECAM_R float32 mag Like KCORR10_DECAM_G but for DECam *r*-band. KCORR10_DECAM_Z float32 mag Like KCORR10_DECAM_G but for DECam *z*-band. KCORR00_U float32 mag K-correction used to derive ABSMAG00_U band-shifted to z=0.0. KCORR00_B float32 mag Like KCORR00_U but for Johnson/Cousins *B*-band. KCORR00_V float32 mag Like KCORR00_U but for Johnson/Cousins *V*-band. KCORR01_SDSS_U float32 mag K-correction used to derive ABSMAG01_SDSS_U band-shifted to z=0.1. KCORR01_SDSS_G float32 mag Like KCORR01_SDSS_U but for SDSS *g*-band. KCORR01_SDSS_R float32 mag Like KCORR01_SDSS_U but for SDSS *r*-band. KCORR01_SDSS_I float32 mag Like KCORR01_SDSS_U but for SDSS *i*-band. KCORR01_SDSS_Z float32 mag Like KCORR01_SDSS_U but for SDSS *z*-band. KCORR01_W1 float32 mag K-correction used to derive ABSMAG01_W1 band-shifted to z=0.0. LOGLNU_1500 float32 1e-28 erg / (Hz s) Monochromatic luminosity at 1500 A in the rest-frame. LOGLNU_1500_IVAR float32 1e+56 Hz2 s2 / erg2 Inverse variance in LOGLNU_1500. LOGLNU_2800 float32 1e-28 erg / (Hz s) Monochromatic luminosity at 2800 A in the rest-frame. LOGLNU_2800_IVAR float32 1e+56 Hz2 s2 / erg2 Inverse variance in LOGLNU_2800. LOGL_1450 float32 1e10 Lsun Integrated luminosity at 1450 A in the rest-frame. LOGL_1450_IVAR float32 1e-20 / Lsun2 Inverse variance in LOGL_1450. LOGL_1700 float32 1e10 Lsun Integrated luminosity at 1700 A in the rest-frame. LOGL_1700_IVAR float32 1e-20 / Lsun2 Inverse variance in LOGL_1700. LOGL_3000 float32 1e10 Lsun Integrated luminosity at 3000 A in the rest-frame. LOGL_3000_IVAR float32 1e-20 / Lsun2 Inverse variance in LOGL_3000. LOGL_5100 float32 1e10 Lsun Integrated luminosity at 5100 A in the rest-frame. LOGL_5100_IVAR float32 1e-20 / Lsun2 Inverse variance in LOGL_5100. FLYA_1215_CONT float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at 1215.67 A in the rest-frame. FLYA_1215_CONT_IVAR float32 1e+34 cm4 Angstrom2 s2 / erg2 Inverse variance in FLYA_1215_CONT. FOII_3727_CONT float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at 3728.483 A in the rest-frame. FOII_3727_CONT_IVAR float32 1e+34 cm4 Angstrom2 s2 / erg2 Inverse variance in FOII_3727_CONT. FHBETA_CONT float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at 4862.683 A in the rest-frame. FHBETA_CONT_IVAR float32 1e+34 cm4 Angstrom2 s2 / erg2 Inverse variance in FHBETA_CONT. FOIII_5007_CONT float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at 5008.239 A in the rest-frame. FOIII_5007_CONT_IVAR float32 1e+34 cm4 Angstrom2 s2 / erg2 Inverse variance in FOIII_5007_CONT. FHALPHA_CONT float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at 6564.613 A in the rest-frame. FHALPHA_CONT_IVAR float32 1e+34 cm4 Angstrom2 s2 / erg2 Inverse variance in FHALPHA_CONT. ============================= ============ ============================= ============================================ HDU03 ----- EXTNAME = FASTSPEC Table with spectral fitting results. Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. dropdown:: Required Header Keywords Table :open: .. rst-class:: keywords ======== ================ ==== ============================================== KEY Example Value Type Comment ======== ================ ==== ============================================== NAXIS1 3115 int length of dimension 1 NAXIS2 338 int length of dimension 2 CHECKSUM WLDnaKDlWKDlaKDl str HDU checksum updated 2022-08-03T14:25:08 DATASUM 756558178 str data unit checksum updated 2022-08-03T14:25:08 ======== ================ ==== ============================================== Required Data Table Columns ~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. rst-class:: columns =========================== ============ ============================= ============================================ Name Type Units Description =========================== ============ ============================= ============================================ TARGETID int64 Unique target ID. SURVEY [1]_ bytes3 Survey name. PROGRAM [1]_ bytes6 Program name. HEALPIX [1]_ int32 Healpixel number. TILEID [2]_ int32 Tile ID number. NIGHT [2]_ int32 Night of observation. FIBER [2]_ int32 Fiber number. EXPID [3]_ int32 Exposure ID number. SNR_B float32 Median signal-to-noise ratio per pixel in the *b* camera. SNR_R float32 Like SNR_B but in the *r* camera. SNR_Z float32 Like SNR_B but in *z* camera. SMOOTHCORR_B float32 percent Median value of the smooth continuum correction relative to the data in the *b* camera. SMOOTHCORR_R float32 percent Like SMOOTHCORR_B but in the *r* camera. SMOOTHCORR_Z float32 percent Like SMOOTHCORR_B but in the *z* camera. APERCORR float32 Median aperture correction factor. APERCORR_G float32 Aperture correction factor measured in the *g*-band. APERCORR_R float32 Like APERCORR_G but measured in the *r*-band. APERCORR_Z float32 Like APERCORR_G but measured in the *z*-band. INIT_SIGMA_UV float32 km / s Initial line width for the rest-frame UV emission lines. INIT_SIGMA_NARROW float32 km / s Like INIT_SIGMA_UV but for the forbidden plus narrow Balmer emission lines. INIT_SIGMA_BALMER float32 km / s Like INIT_SIGMA_UV but for broad Balmer emission lines. INIT_VSHIFT_UV float32 km / s Initial velocity shift for the UV emission lines. INIT_VSHIFT_NARROW float32 km / s Like INIT_VSHIFT_UV but for narrow (forbidden and narrow Balmer) emission lines. INIT_VSHIFT_BALMER float32 km / s Like INIT_VSHIFT_UV but for broad Balmer emission lines. INIT_BALMER_BROAD bool Boolean flag indicating whether a broad Balmer emission line was initially identified in the spectral range. DELTA_LINECHI2 float32 Chi-squared difference between an emission-line model without and with broad lines. DELTA_LINENDOF int32 Difference in the degrees of freedom between an emission-line model without and with broad lines. DELTA_KINECHI2 float32 Chi-squared difference between the constrained and relaxed emission-line model. DELTA_KINENDOF int32 Difference in the degrees of freedom between the constrained and relaxed emission-line model. MGII_DOUBLET_RATIO float32 MgII 2796 / 2803 doublet line-ratio. MGII_DOUBLET_RATIO_IVAR float32 Inverse variance in MGII_DOUBLET_RATIO. OII_DOUBLET_RATIO float32 [OII] 3726 / 3729 doublet line-ratio. OII_DOUBLET_RATIO_IVAR float32 Inverse variance in OII_DOUBLET_RATIO. OIII_DOUBLET_RATIO float32 [OIII] 5007 / 4959 doublet line-ratio. OIII_DOUBLET_RATIO_IVAR float32 Inverse variance in OIII_DOUBLET_RATIO. SII_DOUBLET_RATIO float32 [SII] 6731 / 6716 doublet line-ratio. SII_DOUBLET_RATIO_IVAR float32 Inverse variance in SII_DOUBLET_RATIO. NII_DOUBLET_RATIO float32 [NII] 6584 / 6548 doublet line-ratio. NII_DOUBLET_RATIO_IVAR float32 Inverse variance in NII_DOUBLET_RATIO. OIIRED_DOUBLET_RATIO float32 [OII] 7320 / 7330 doublet (actually a quadruplet) line-ratio. OIIRED_DOUBLET_RATIO_IVAR float32 Inverse variance in OIIRED_DOUBLET_RATIO. LINENAME_MODELAMP [6]_ float32 1e-17 erg / (Angstrom cm2 s) Model emission-line amplitude (before convolution with the resolution matrix). LINENAME_AMP [6]_ float32 1e-17 erg / (Angstrom cm2 s) Emission line amplitude. LINENAME_AMP_IVAR [6]_ float32 1e+34 Angstrom2 cm4 s2 / erg2 Inverse variance in LINENAME_AMP. LINENAME_FLUX [6]_ float32 1e-17 erg / (cm2 s) Gaussian-integrated emission-line flux. LINENAME_FLUX_IVAR [6]_ float32 1e+34 cm4 s2 / erg2 Inverse variance in LINENAME_FLUX. LINENAME_BOXFLUX [6]_ float32 1e-17 erg / (cm2 s) Boxcar-integrated emission-line flux. LINENAME_BOXFLUX_IVAR [6]_ float32 1e+34 cm4 s2 / erg2 Inverse variance in LINENAME_BOXFLUX. LINENAME_VSHIFT [6]_ float32 km / s Velocity shift relative to Z. LINENAME_VSHIFT_IVAR [6]_ float32 s2 / km2 Inverse variance in LINENAME_VSHIFT. LINENAME_SIGMA [6]_ float32 km / s Gaussian emission-line width (before convolution with the resolution matrix). LINENAME_SIGMA_IVAR [6]_ float32 s2 / km2 Inverse variance in LINENAME_SIGMA. LINENAME_CONT [6]_ float32 1e-17 erg / (Angstrom cm2 s) Continuum flux at line center. LINENAME_CONT_IVAR [6]_ float32 1e+34 Angstrom2 cm4 s2 / erg2 Inverse variance in LINENAME_CONT. LINENAME_EW [6]_ float32 Angstrom Rest-frame emission-line equivalent width. LINENAME_EW_IVAR [6]_ float32 1 / Angstrom2 Inverse variance in LINENAME_EW. LINENAME_FLUX_LIMIT [6]_ float32 erg / (cm2 s) One-sigma upper-limit on the emission line flux. LINENAME_CHI2 [6]_ float32 Chi-squared of the line-fit. LINENAME_NPIX [6]_ int32 Number of pixels attributed to the emission line. LINENAME2_MOMENT1 [7]_ float32 Angstrom First moment of the continuum-subtracted pixel values within +/- 5-sigma of the Gaussian line-center. LINENAME2_MOMENT1_IVAR [7]_ float32 1 / Angstrom2 Inverse variance in LINENAME2_MOMENT1. LINENAME2_MOMENT2 [7]_ float32 Angstrom2 Second moment of the flux relative to LINENAME2_MOMENT1. LINENAME2_MOMENT2_IVAR [7]_ float32 1 / Angstrom4 Inverse variance in LINENAME2_MOMENT2. LINENAME2_MOMENT3 [7]_ float32 Angstrom3 Third moment of the flux relative to LINENAME2_MOMENT1. LINENAME2_MOMENT3_IVAR [7]_ float32 1 / Angstrom6 Inverse variance in LINENAME2_MOMENT3. =========================== ============ ============================= ============================================ HDU04 ----- EXTNAME = MODELS Best-fitting model spectra (corrected for Galactic extinction). Required Header Keywords ~~~~~~~~~~~~~~~~~~~~~~~~ .. dropdown:: Required Header Keywords Table :open: .. rst-class:: keywords ======== ============================ ===== ============================================== KEY Example Value Type Comment ======== ============================ ===== ============================================== NAXIS1 7781 int number of pixels NAXIS2 3 int number of models NAXIS3 338 int number of objects BUNIT 10**-17 erg/(s cm2 Angstrom) str flux unit CUNIT1 Angstrom str wavelength unit CTYPE1 WAVE str type of axis CRVAL1 3600.0 float wavelength of pixel CRPIX1 (Angstrom) CRPIX1 0 int 0-indexed pixel number corresponding to CRVAL1 CDELT1 0.8 float pixel size (Angstrom) DC-FLAG 0 int 0 = linear wavelength vector AIRORVAC vac str wavelengths in vacuum (vac) CHECKSUM Q9eTT8bTQ8bTQ8bT str HDU checksum updated 2022-08-03T14:25:08 DATASUM 3074907107 str data unit checksum updated 2022-08-03T14:25:08 ======== ============================ ===== ============================================== Data: FITS image [int32, 7781x3,338] .. [1] Column only present when fitting healpix coadds. .. [2] Column only present when fitting cumulative, per-night, or per-expopsure tile-based coadds. .. [3] Column only present when fitting per-exposure tile-based coadds. .. [4] Only observed photometry with a minimum signal-to-noise ratio of two is used to compute K-corrections. Absolute magnitudes are estimated using from the (S/N>2) observed-frame bandpass nearest in wavelength to the desired band-shifted rest-frame bandpass. If no observed-frame photometry is available, then the absolute magnitude is synthesized from the best-fitting model and the corresponding inverse variance is set to zero. .. [5] Column only present in Commissioning and Survey Validation spectroscopic observations. .. [6] `LINENAME` represents the following modeled emission lines: NV_1240, OI_1304, SILIV_1396, CIV_1549, HEII_1640, ALIII_1857, SILIII_1892, CIII_1908, MGII_2796, MGII_2803, NEV_3346, NEV_3426, OII_3726, OII_3729, NEIII_3869, H6, H6_BROAD, HEPSILON, HEPSILON_BROAD, HDELTA, HDELTA_BROAD, HGAMMA, HGAMMA_BROAD, OIII_4363, HEI_4471, HEII_4686, HBETA, HBETA_BROAD, OIII_4959, OIII_5007, NII_5755, HEI_5876, OI_6300, SIII_6312, NII_6548, HALPHA, HALPHA_BROAD, NII_6584, SII_6716, SII_6731, ARIII_7135, OII_7320, OII_7330, SIII_9069, and SIII_9532. .. [7] `LINENAME2` represents the following emission lines: CIV_1549, MGII_2800 (using the mean wavelength of the doublet), HBETA, and OIII_5007.