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Дата изменения: Unknown Дата индексирования: Fri Dec 28 20:23:36 2007 Кодировка: Поисковые слова: система координат галактическая |
Another important thing needs a special discussed agreement
is the standard format of output. We have used the FITS
TABLE format (Wells et al., 1981;
Geisen & Harten, 1981) to describe data
obtained from the CATS. The simplified FITS table format, which we used,
consists of the header extension with keywords (not longer than
8 characters) and their values,
describing the data, and data themself.
Here is an example of the output header of CATS data.
Our format differs from the canonic FITS by the absence of
compulsary spaces between the keyword, the sign '=' and the value
of the keyword.
SIMPLE=T / BITPIX=8 / character information NAXIS=0 / no image data array present EXTEND=T / may be standard extensions OBJECT=CATS SEARCH / CATS search result ORIGIN=SAO RAS DATE=01/01/1997 / date of file creation END XTENSION=TABLE / F-file table extension BITPIX=8 / 8-bits per "pixel" NAXIS=2 / simple 2-D matrix NAXIS1=93 / No. of characters per row NAXIS2=1000 / the number of lines (sources) TFIELDS=10 / there are 16 fields per row EXTNAME=CATS / object name: CATS result TTYPE1=NAME / name of source in catalog TBCOL1=1 / start in column 1 TFORM1=A16 / 16 character TTYPE2=RAH / right ascension hours TBCOL2=18 / start in column 18 TFORM2=I2 / 2 digit integer TUNIT2=HR / units are hours TNULL2=00 / null value TTYPE3=RAM / right ascension hours TBCOL3=21 / start in column 21 TFORM3=I2 / 2 digit integer TUNIT3=MIN / minutes of time TNULL3=00 / null value TTYPE4=RAS / right ascension minutes TBCOL4=24 / start in column 24 TFORM4=E6.2 / xx.xxx SP floating point TUNIT4=S / seconds of time TNULL4=00.000 / null value TTYPE5=ERAS / error of right ascension sec TBCOL5=31 / start in column 31 TFORM5=A6 / xx.xxx SP float. point or 'n' TUNIT5=S / seconds of time TNULL5=n / null value TTYPE6=DECDSIGN / declination sign TBCOL6=39 / start in column 39 TFORM6=A1 / charachter field TNULL6=' ' / null value TTYPE6=DECD / declination degrees TBCOL6=40 / start in column 40 TFORM6=I2 / 2 digit integer TUNIT6=DEG / degrees TNULL6=00 / null value TTYPE7=DECM / declination minutes TBCOL7=43 / start in column 43 TFORM7=I2 / 2 digit integer TUNIT7=ARCMIN / minutes (angle) TNULL7=00 / null value TTYPE8=DECS / declination seconds TBCOL8=46 / start in column 46 TFORM8=E5.2 / xx.xx SP floating point TUNIT8=ARCSEC / seconds (angle) TNULL8=00.00 / null value TTYPE9=EDECS / error of declination seconds TBCOL9=52 / start in column 52 TFORM9=A5 / xx.xx SP float. point or '?' TUNIT9=ARCSEC / seconds (angle) TNULL9=n / null value TTYPE10=FREQ / frequency TBCOL10=58 / start in column 58 TFORM10=A7 / xxxxxx float. point or 'n' TUNIT10=MHZ / MegaHertz TNULL10=n / null value TTYPE11=FLUXD / flux density TBCOL11=66 / start in column 66 TFORM11=A9 / xxxxxx SP float.point or 'n' TUNIT11=JY / Jansky TNULL11=n / null value TTYPE12=EFLUXD / error of flux density TBCOL12=76 / start in column 76 TFORM12=A5 / xxxxx SP float point or 'n' TUNIT12=JY / Jansky TNULL12=n / null value TTYPE15=CATALOG / reference: catalog name TBCOL15=82 / start in column 82 TFORM15=A5 / xxxxx,xxx character field TNULL15=n / null value TTYPE16=REFERENCE / reference: No in database TBCOL16=89 / start in column 89 TFORM16=A3 / xxx character field COMMENT Any comments HISTORY History of data operation HISTORY END ................................................ ........ Table of rows of ASCII data ........... ................................................