Data model: fpAtlas

General description: Contains the atlas images for all objects detected in a single field.

Naming convention: fpAtlas-rrrrrr-c-ffff.fit, where rrrrrr is the imaging run number, c is the column location in the Imaging Array of the CCD which acquired the data (1-6), and ffff is the field number within the run.

Approximate size: This is a guess. Say 400 objects per field, with an average atlas image measuring 10x10 pixels. Then 665.28 Kb per file. One file per field. Total of 665.28 Mb for a single frames pipeline run with 1000 fields.

File type: FITS binary table

Read by products:

Written by products: frames

Required header keywords: (should be listed for Yanny and FITS)

Primary Header


SIMPLE  =                    T
BITPIX  =                    8
NAXIS   =                    0
EXTEND  =                    T
VERSION = 'v5_3_53 '                   / Version of software used.
DERV_VER= 'v8_15   '
ASTR_VER= 'v5_13   '
ASTRO_ID= '2002-09-04T21:12:55 06053'  / Astrometric pipeline run identifier.
BIAS_ID = 'PS      '                   / Bias pipeline run identifier.
FRAME_ID= '2002-09-05T13:21:29 18735'  / Frames pipeline run identifier.
KO_VER  = 'devel   '                   / Version of known object catalog used.
PS_ID   = '2002-09-04T17:49:34 19844 camCol 1'/ Postage stamp pipeline run identifier.
CREATIME= 'Thu Sep  5 18:22:46 2002 UTC' / The local time when this file was cre
SEED    =             97451090 / Seed for photo random number generato
REF_BAND=                    2 / index of band used for canonical cent
RUN     =                 1336 / Imaging run number
RERUN   =                   21 / Processing rerun number
CAMCOL  =                    1 / Column in the imaging camera
FIELD   =                   11 / Field sequence number
FILTERS = 'u g r i z'          / Filter order in arrays
DARK_VAR= '9.61 15.6025 1.8225 7.84 0.81' / Per-pixel variances at zero DN; DN^2
GAIN    = '1.62 3.32 4.71 5.165 4.745' / Mean gains of amplifiers; e/DN
NROW    =                 1489
NCOL    =                 2048
SOFTBIAS=                 1000 / software "bias" added to all DN

END

Table Header

There is one HDU of this type.


XTENSION= 'BINTABLE'
BITPIX  =                    8
NAXIS   =                    2
NAXIS1  =                   32
NAXIS2  =                  XXX
PCOUNT  =                  XXX
GCOUNT  =                    1
TFIELDS =                    7
THEAP   =                  XXX
TFORM1  = '1J      ' /INT
TTYPE1  = 'id      ' /id
TFORM2  = '1J      ' /INT
TTYPE2  = 'run     ' /run
TFORM3  = '1J      ' /INT
TTYPE3  = 'rerun   ' /rerun
TFORM4  = '1J      ' /INT
TTYPE4  = 'camCol  ' /camCol
TFORM5  = '1J      ' /INT
TTYPE5  = 'field   ' /field
TFORM6  = '1J      ' /INT
TTYPE6  = 'parent  ' /parent
TFORM7  = '1PB(0)  ' /UCHAR
TTYPE7  = 'ncolor  ' /ncolor

END