.. _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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: 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 Redrock or QuasarNet (for QSO targets only). ZWARN int8 Redrock zwarning bit. DELTACHI2 float64 Redrock delta-chi-squared. SPECTYPE str6 Redrock spectral classification type. SUBTYPE str20 Redrock spectral subtype. Z_RR float64 Redrock redshift. 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: 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 1e-10 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 1e-10 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 1e-10 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 1e-10 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: 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. 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 ~~~~~~~~~~~~~~~~~~~~~~~~ .. collapse:: 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.