キーワードのまとめ

簡便なリファレンスのため、キーワードの表を掲載する(FITS スタンダード付録)。

表 19: FITS standard 4.0 で記述された一般的な予約された FITS キーワード。

Production	Bibliographic	Commentary	Observation
DATE	AUTHOR	COMMENT	DATE-OBS
ORIGIN	REFERENC	HISTORY	TELESCOP
BLOCKED			INSTRUME
(今後使うべきでない)			OBSERVER
			OBJECT
			EQUINOX
			EPOCH(Deprecated)

表 20: FITS Standard 4.0 で記述されている構造に関する必須 FITS キーワード.

Primary	Conforming	Image	ASCII-table	Binary-table	Compressed	Compressed	Random-groups
HDU	extension	extension	extension	extension	images$^{6}$	tables$^{6}$	records
SIMPLE	XTENSION	XTENSION$^{1}$	XTENSION$^{2}$	XTENSION$^{3}$	ZIMAGE =T	ZTABLE =T	SIMPLE
BITPIX	BITPIX	BITPIX	BITPIX = 8	BITPIX = 8	ZBITPIX	ZNAXIS1	BITPIX
NAXIS	NAXIS	NAXIS	NAXIS = 2	NAXIS = 2	ZNAXIS	ZNAXIS2	NAXIS
NAXISn$^{4}$	NAXISn$^{4}$	NAXISn$^{4}$	NAXIS1	NAXIS1	ZNAXISn	ZPCOUNT	NAXIS1 = 0
END	PCOUNT	PCOUNT = 0	NAXIS2	NAXIS2	ZCMPTYPE	ZFORMn	NAXISn$^{4}$
	GCOUNT	GCOUNT = 1	PCOUNT = 0	PCOUNT		ZCTYPn	GROUPS = T
	END	END	GCOUNT = 1	GCOUNT = 1		ZTILELEN	PCOUNT
			TFIELDS	TFIELDS			GCOUNT
			TFORMn$^{5}$	TFORMn$^{5}$			END
			TBCOLn$^{5}$	END
			END

$^{(1)}$XTENSION= 'IMAGE ' for the image extension.
$^{(2)}$XTENSION= 'TABLE ' for the ASCII-table extension.
$^{(3)}$XTENSION= 'BINTABLE' for the binary-table extension.
$^{(4)}$Runs from 1 through the value of NAXIS.
$^{(5)}$Runs from 1 through the value of TFIELDS.
$^{(6)}$Required in addition to the mandatory keywords for binary tables.

表 21: FITS Standard 4.0 で記述された構造に関する予約されたキーワード

All$^{1}$		Array$^{2}$	ASCII-table	Binary-table	Compressed	Compressed	Random-groups
HDUs		HDUs	extension	extension	images	tables	records
DATE	EXTNAME	BSCALE	TSCALn	TSCALn	ZTILEn	FZTILELN	PTYPEn
DATE-OBS	EXTVER	BZERO	TZEROn	TZEROn	ZNAMEi	FZALGOR	PSCALn
ORIGIN	EXTLEVEL	BUNIT	TNULLn	TNULLn	ZVALi	FZALGn	PZEROn
AUTHOR	EQUINOX	BLANK	TTYPEn	TTYPEn	ZMASKCMP
REFERENC	EPOCH$^{3}$	DATAMAX	TUNITn	TUNITn	ZQUANTIZ
COMMENT	BLOCKED$^{3}$	DATAMIN	TDISPn	TDISPn	0
HISTORY	EXTEND$^{4}$		TDMAXn	TDIMn	ZSIMPLE	ZTHEAP
	TELESCOP		TDMINn	THEAP	ZEXTEND
OBJECT	INSTRUME		TLMAXn	TDMAXn	ZBLOCKED
OBSERVER			TLMINn	TDMINn	ZTENSION
CONTINUE				TLMAXn	ZPCOUNT
INHERIT$^{5}$				TLMINn	ZGCOUNT
CHECKSUM					ZHECKSUM	ZHECKSUM
DATASUM					ZDATASUM	ZDATASUM

$^{(1)}$These keywords are further categorized in Table C.3.
$^{(2)}$Primary HDU, IMAGE extension, user-defined HDUs with same array structure.
$^{(3)}$Deprecated.
$^{(4)}$Only permitted in the primary HDU.
$^{(5)}$Only permitted in extension HDUs, immediately following the mandatory keywords.