Name: asTrans-rrrrrr.fit for those produced by ASTROM, scTrans-rrrrrr-c.fit for those produced by SSC, where rrrrrr is the imaging run number and c is the camera column.
Produced by: astrom, ssc
Used by: ps, frames
Size: 2880 + Nccds * (2880 + (Nfields * 156, rounded up to an even multiple of 2880)) bytes. Total of 4,841.28 Kb for the photometric file with all 30 photometric CCDs for a run with 1000 fields.
Archived? Yes
r-i < riCut:
rowm = row + dRow0 + dRow1*col + dRow2*(col^2) + dRow3*(col^3) + csRow*(color)
colm = col + dCol0 + dCol1*col + dCol2*(col^2) + dCol3*(col^3) + csCol*(color)
r-i >= riCut
rowm = row + dRow0 + dRow1*col + dRow2*(col^2) + dRow3*(col^3) + ccRow
colm = col + dCol0 + dCol1*col + dCol2*(col^2) + dCol3*(col^3) + ccCol
mu = a + b * rowm + c * colm
nu = d + e * rowm + f * colm
The color to use is u-g for u, g-r gor g, and r-i for r, i, z and the
astrometric filters.
The order of the extension HDUs is determined by the PDU keywords
CCDARRAY, which is set to "astro" if this file is for the astrometric
chips or "photo" if this file is for the photometric chips,
CAMCOLS, which contains a white-space separated list of the columns
in the imaging camera processed, and FILTERS, which contains a
white-space separated list of the filters/camera-rows processed. There is one
HDU per CCD processed, in order as listed in CAMCOLS and
FILTERS, with FILTERS being the most rapidly varying index
if CCDARRAY is set to "photo", and CAMCOLS being the most
rapidly varying index if CCDARRAY is set to "astro".
For example, if the PDU contains the keywords:
CCDARRAY= 'photo ' / CCDs CAMCOLS = '1 2 3 ' / Columns in the imaging camera processed. FILTERS = 'r i ' / Filters (rows in the imaging camera) processed.then the HDUs in the file are ordered as follows:
PDU HDU camCol=1, filter=r HDU camCol=1, filter=i HDU camCol=2, filter=r HDU camCol=2, filter=i HDU camCol=3, filter=r HDU camCol=4, filter=iThe errors, muErr and nuErr, are the errors in the transformation (that is, the rms systematic errors) in great circle longitude and latitude, respectively. For the r' chips, this is the error in the absolute astrometry (r' coordinates to sky). For the u', g', i', and z' chips, this is the error in the relative astrometry (u', g', i', or z' to r'). For example, to transform g' pixel coordinates to r' pixel coordinates, one applies the g' TRANS structure to the g' coordinates, and then the inverse r' TRANS structure to the intermediate sky coordinates. The total error in this transformation is just the errors listed in the g' TRANS structure. Those errors are in arcsec; to convert to errors in the transformed r' coordinates just divide by the pixel scale for the r' CCD.
SIMPLE = T BITPIX = 8 NAXIS = 0 EXTEND = T VERSION = 'XXX ' / Version of software used. ASTRO_ID= 'XXX ' / ASTROM pipe run id (ASTROM TRANS files only) SSC_ID = 'XXX ' / SSC pipeline run id (SSC TRANS files only) INCL = XXX.XXXXX / Great circle inclination wrt cel. eq. (degrees) NODE = XXX.XXXXX / RA of great circle's asending node. (degrees) EQUINOX = XXXX.XX / Equinox of great circle coordinates. (years) FIELD0 = XXX / First field reduced. NFIELDS = XXX / Number of fields reduced. KO_VER = 'XXX ' / Version of known object catalog used. RUN = XXX / Imaging run number. CCDARRAY= 'photo ' / CCD array (photo or astro) CAMCOLS = '1 2 3 4 5 6' / Columns in the imaging camera processed. FILTERS = 'r i u z g' / Filters (rows in the imaging camera) processed. COMMENT The following keywords are for ASTROM TRANS files only: SSC01_ID= 'XXX ' / SSC pipeline run identifier for column 1. SSC02_ID= 'XXX ' / SSC pipeline run identifier for column 2. SSC03_ID= 'XXX ' / SSC pipeline run identifier for column 3. SSC04_ID= 'XXX ' / SSC pipeline run identifier for column 4. SSC05_ID= 'XXX ' / SSC pipeline run identifier for column 5. SSC06_ID= 'XXX ' / SSC pipeline run identifier for column 6. SSC07_ID= 'XXX ' / SSC pipeline run identifier for column 7. SSC08_ID= 'XXX ' / SSC pipeline run identifier for column 8. SSC09_ID= 'XXX ' / SSC pipeline run identifier for column 9. SSC10_ID= 'XXX ' / SSC pipeline run identifier for column 10. SSC11_ID= 'XXX ' / SSC pipeline run identifier for column 11. PS01_ID = 'XXX ' / PS pipeline run identifier for column 1. PS02_ID = 'XXX ' / PS pipeline run identifier for column 2. PS03_ID = 'XXX ' / PS pipeline run identifier for column 3. PS04_ID = 'XXX ' / PS pipeline run identifier for column 4. PS05_ID = 'XXX ' / PS pipeline run identifier for column 5. PS06_ID = 'XXX ' / PS pipeline run identifier for column 6. COMMENT mu nu are defined as: COMMENT r'-i' < riCut: COMMENT rowm = row+dRow0+dRow1*col+dRow2*(col^2)+dRow3*(col^3)+csRow*c COMMENT colm = col+dCol0+dCol1*col+dCol2*(col^2)+dCol3*(col^3)+csCol*c COMMENT r'-i' >= riCut COMMENT rowm = row+dRow0+dRow1*col+dRow2*(col^2)+dRow3*(col^3)+ccRow COMMENT colm = col+dCol0+dCol1*col+dCol2*(col^2)+dCol3*(col^3)+ccCol COMMENT mu = a + b * rowm + c * colm COMMENT nu = d + e * rowm + f * colm END
XTENSION= 'BINTABLE' BITPIX = 8 NAXIS = 2 NAXIS1 = 180 NAXIS2 = XXX PCOUNT = 0 GCOUNT = 1 TFIELDS = 24 FILTER = 'XXX ' / Filter (u, g, r, i, or z). CAMCOL = XXX / Column in the imaging camera. CAMROW = XXX / Row in the imaging camera. TFORM1 = '1J ' TTYPE1 = 'field ' / Field sequence number within the run. TFORM2 = '1D ' TTYPE2 = 'a ' / A. TFORM3 = '1D ' TTYPE3 = 'b ' / B. TFORM4 = '1D ' TTYPE4 = 'c ' / C. TFORM5 = '1D ' TTYPE5 = 'd ' / D. TFORM6 = '1D ' TTYPE6 = 'e ' / E. TFORM7 = '1D ' TTYPE7 = 'f ' / F. TFORM8 = '1D ' TTYPE8 = 'dRow0 ' / Zero-order row distortion coefficient. TFORM9 = '1D ' TTYPE9 = 'dRow1 ' / First-order row distortion coefficient. TFORM10 = '1D ' TTYPE10 = 'dRow2 ' / Second-order row distortion coefficient. TFORM11 = '1D ' TTYPE11 = 'dRow3 ' / Third-order row distortion coefficient. TFORM12 = '1D ' TTYPE12 = 'dCol0 ' / Zero-order column distortion coefficient. TFORM13 = '1D ' TTYPE13 = 'dCol1 ' / First-order column distortion coefficient. TFORM14 = '1D ' TTYPE14 = 'dCol2 ' / Second-order column distortion coefficient. TFORM15 = '1D ' TTYPE15 = 'dCol3 ' / Third-order column distortion coefficient. TFORM16 = '1D ' TTYPE16 = 'csRow ' / Slope in row DCR correction for blue objects. TFORM17 = '1D ' TTYPE17 = 'csCol ' / Slope in column DCR correction for blue objects TFORM18 = '1D ' TTYPE18 = 'ccRow ' / Constant row DCR correction for red objects. TFORM19 = '1D ' TTYPE19 = 'ccCol ' / Constant column DCR correction for red objects. TFORM20 = '1D ' TTYPE20 = 'riCut ' / r'-i' cutoff between blue and red objects. TFORM21 = '1D ' TTYPE21 = 'mjd ' / MJD(TAI) when row 0 was read. TUNIT21 = 'MJD ' TFORM22 = '1D ' TTYPE22 = 'airmass ' / Airmass for star at frame center (mid exposure) TFORM23 = '1E ' TTYPE23 = 'muErr ' / Error in transformation in mu TUNIT23 = 'arcsec ' TFORM24 = '1E ' TTYPE24 = 'nuErr ' / Error in transformation in nu TUNIT24 = 'arcsec ' END