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.


Osamu Kanamitsu
2019-02-15