General description: This file contains the calibration vectors for a given frame.
HDU #0: Calibration image HDU #1: Trace-set used to construct the former HDU #2: Structure with info on each standard star
Naming convention: spFluxcalib-[c][n]-eeeeeeee.fits.gz Where [c] indicates either a blue or red spectrograph, [n] indicates the spectrograph number (1 or 2) and eeeeeeee indicates the exposure number.
Approximate size: 5 MB.
File type: FITS
Read by products: spfluxcorr_v5.pro, spthroughput.pro, spcoadd_v5.pro
Written by products: spflux_v5.pro
Image with the flux calibration vector for each fiber.
Example header:
SIMPLE = T /Primary Header created by MWRFITS v1.8 BITPIX = -32 / NAXIS = 2 / NAXIS1 = 4112 / Number of wavelength bins NAXIS2 = 500 / Number of fibers EXTEND = T /Extensions may be present WAVEMIN = 3553.95 / WAVEMAX = 6301.75 /
Binary table with traceset structure of b-spline fits for calibration vectors. This is a compact version of the information in the primary HDU.
Example header:
XTENSION= 'BINTABLE' /Binary table written by MWRFITS v1.8 BITPIX = 8 /Required value NAXIS = 2 /Required value NAXIS1 = 3242 /Number of bytes per row NAXIS2 = 1 /Number of rows PCOUNT = 0 /Normally 0 (no varying arrays) GCOUNT = 1 /Required value TFIELDS = 5 /Number of columns in table COMMENT COMMENT *** End of mandatory fields *** COMMENT COMMENT COMMENT *** Column names *** COMMENT TTYPE1 = 'FULLBKPT' / TTYPE2 = 'BKMASK ' / TTYPE3 = 'NORD ' / TTYPE4 = 'COEFF ' / TTYPE5 = 'ICOEFF ' / COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = '233E ' / TFORM2 = '233I ' / TFORM3 = 'J ' / TFORM4 = '230E ' / TFORM5 = '230E ' /
Binary table with information about the standard stars used to construct the calibration vector.
Example header
XTENSION= 'BINTABLE' /Binary table written by MWRFITS v1.8 BITPIX = 8 /Required value NAXIS = 2 /Required value NAXIS1 = 16617 /Number of bytes per row NAXIS2 = 10 /Number of rows PCOUNT = 0 /Normally 0 (no varying arrays) GCOUNT = 1 /Required value TFIELDS = 18 /Number of columns in table COMMENT COMMENT *** End of mandatory fields *** COMMENT COMMENT COMMENT *** Column names *** COMMENT TTYPE1 = 'PLATE ' / TTYPE2 = 'MJD ' / TTYPE3 = 'FIBERID ' / TTYPE4 = 'QGOOD ' / TTYPE5 = 'MODEL ' / TTYPE6 = 'FEH ' / TTYPE7 = 'TEFF ' / TTYPE8 = 'G ' / TTYPE9 = 'MAG ' / TTYPE10 = 'IMODEL ' / TTYPE11 = 'Z ' / TTYPE12 = 'SN_MEDIAN' / TTYPE13 = 'CHI2 ' / TTYPE14 = 'DOF ' / TTYPE15 = 'LINESN_MEDIAN' / TTYPE16 = 'LINECHI2' / TTYPE17 = 'LINEDOF ' / TTYPE18 = 'MODELFLUX' / COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = 'J ' / TFORM2 = 'J ' / TFORM3 = 'J ' / TFORM4 = 'I ' / TFORM5 = '19A ' / TFORM6 = 'E ' / TFORM7 = 'E ' / TFORM8 = 'E ' / TFORM9 = '5E ' / TFORM10 = 'J ' / TFORM11 = 'D ' / TFORM12 = 'E ' / TFORM13 = 'E ' / TFORM14 = 'E ' / TFORM15 = 'E ' / TFORM16 = 'D ' / TFORM17 = 'E ' / TFORM18 = '4128E ' /