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Standard FITS headers maybe applicable to Tables
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| KEYWORD: (blank) | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: descriptive comment | |
| DEFINITION: Columns 1-8 contain ASCII blanks. This keyword has no | |
| associated value. Columns 9-80 may contain any ASCII text. Any number | |
| of card images with blank keyword fields may appear in a header. | |
| KEYWORD: AUTHOR | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: author of the data | |
| DEFINITION: The value field shall contain a character string | |
| identifying who compiled the information in the data associated with | |
| the header. This keyword is appropriate when the data originate in a | |
| published paper or are compiled from many sources. | |
| KEYWORD: BITPIX | |
| REFERENCE: FITS Standard | |
| STATUS: manditory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: -64,-32,8,16,32 | |
| COMMENT: bits per data value | |
| DEFINITION: The value field shall contain an integer. The absolute | |
| value is used in computing the sizes of data structures. It shall | |
| specify the number of bits that represent a data value. | |
| KEYWORD: COMMENT | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: descriptive comment | |
| DEFINITION: This keyword shall have no associated value; columns 9-80 | |
| may contain any ASCII text. Any number of COMMENT card images may | |
| appear in a header. | |
| KEYWORD: DATE | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: date of file creation | |
| DEFINITION: The date on which the HDU was created, in the format | |
| specified in the FITS Standard. The old date format was 'yy/mm/dd' and | |
| may be used only for dates from 1900 through 1999. the new Y2K | |
| compliant date format is 'yyyy-mm-dd' or 'yyyy-mm-ddTHH:MM:SS[.sss]'. | |
| KEYWORD: DATE-OBS | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: date of the observation | |
| DEFINITION: The date of the observation, in the format specified in the | |
| FITS Standard. The old date format was 'yy/mm/dd' and may be used only | |
| for dates from 1900 through 1999. The new Y2K compliant date format is | |
| 'yyyy-mm-dd' or 'yyyy-mm-ddTHH:MM:SS[.sss]'. | |
| KEYWORD: EPOCH | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: real | |
| COMMENT: equinox of celestial coordinate system | |
| DEFINITION: The value field shall contain a floating point number | |
| giving the equinox in years for the celestial coordinate system in | |
| which positions are expressed. Starting with Version 1, the Standard | |
| has deprecated the use of the EPOCH keyword and thus it shall not be | |
| used in FITS files created after the adoption of the standard; rather, | |
| the EQUINOX keyword shall be used. | |
| KEYWORD: EQUINOX | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: real | |
| COMMENT: equinox of celestial coordinate system | |
| DEFINITION: The value field shall contain a floating point number | |
| giving the equinox in years for the celestial coordinate system in | |
| which positions are expressed. | |
| KEYWORD: HISTORY | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: processing history of the data | |
| DEFINITION: This keyword shall have no associated value; columns 9-80 | |
| may contain any ASCII text. The text should contain a history of steps | |
| and procedures associated with the processing of the associated data. | |
| Any number of HISTORY card images may appear in a header. | |
| KEYWORD: INSTRUME | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of instrument | |
| DEFINITION: The value field shall contain a character string | |
| identifying the instrument used to acquire the data associated with the | |
| header. | |
| KEYWORD: NAXIS | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: [0:999] | |
| COMMENT: number of axes | |
| DEFINITION: The value field shall contain a non-negative integer no | |
| greater than 999, representing the number of axes in the associated | |
| data array. A value of zero signifies that no data follow the header in | |
| the HDU. In the context of FITS 'TABLE' or 'BINTABLE' extensions, the | |
| value of NAXIS is always 2. | |
| KEYWORD: NAXISn | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: [0:] | |
| COMMENT: size of the axis | |
| DEFINITION: The value field of this indexed keyword shall contain a | |
| non-negative integer, representing the number of elements along axis n | |
| of a data array. The NAXISn must be present for all values n = | |
| 1,...,NAXIS, and for no other values of n. A value of zero for any of | |
| the NAXISn signifies that no data follow the header in the HDU. If | |
| NAXIS is equal to 0, there should not be any NAXISn keywords. | |
| KEYWORD: OBJECT | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of observed object | |
| DEFINITION: The value field shall contain a character string giving a | |
| name for the object observed. | |
| KEYWORD: OBSERVER | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: observer who acquired the data | |
| DEFINITION: The value field shall contain a character string | |
| identifying who acquired the data associated with the header. | |
| KEYWORD: ORIGIN | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: organization responsible for the data | |
| DEFINITION: The value field shall contain a character string | |
| identifying the organization or institution responsible for creating | |
| the FITS file. | |
| KEYWORD: REFERENC | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: bibliographic reference | |
| DEFINITION: The value field shall contain a character string citing a | |
| reference where the data associated with the header are published. | |
| KEYWORD: TDISPn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: display format | |
| DEFINITION: The value field of this indexed keyword shall contain a | |
| character string describing the format recommended for the display of | |
| the contents of field n. If the table value has been scaled, the | |
| physical value shall be displayed. All elements in a field shall be | |
| displayed with a single, repeated format. For purposes of display, each | |
| byte of bit (type X) and byte (type B) arrays is treated as an unsigned | |
| integer. Arrays of type A may be terminated with a zero byte. Only the | |
| format codes in Table 8.6, discussed in section 8.3.4 of the FITS | |
| Standard, are permitted for encoding. The format codes must be | |
| specified in upper case. If the Bw.m, Ow.m, and Zw.m formats are not | |
| readily available to the reader, the Iw.m display format may be used | |
| instead, and if the ENw.d and ESw.d formats are not available, Ew.d may | |
| be used. The meaning of this keyword is not defined for fields of type | |
| P in the Standard but may be defined in conventions using such fields. | |
| KEYWORD: TELESCOP | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of telescope | |
| DEFINITION: The value field shall contain a character string | |
| identifying the telescope used to acquire the data associated with the | |
| header. | |
| KEYWORD: TFIELDS | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: table | |
| VALUE: integer | |
| RANGE: [0:999] | |
| COMMENT: number of columns in the table | |
| DEFINITION: The value field shall contain a non-negative integer | |
| representing the number of fields in each row of a 'TABLE' or | |
| 'BINTABLE' extension. The maximum permissible value is 999. | |
| KEYWORD: TFORMn | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column data format | |
| DEFINITION: The value field of this indexed keyword shall contain a | |
| character string describing the format in which field n is encoded in a | |
| 'TABLE' or 'BINTABLE' extension. | |
| KEYWORD: TNULLn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: integer or string | |
| COMMENT: value used to indicate undefined table element | |
| DEFINITION: In ASCII 'TABLE' extensions, the value field for this | |
| indexed keyword shall contain the character string that represents an | |
| undefined value for field n. The string is implicitly blank filled to | |
| the width of the field. In binary 'BINTABLE' table extensions, the | |
| value field for this indexed keyword shall contain the integer that | |
| represents an undefined value for field n of data type B, I, or J. The | |
| keyword may not be used in 'BINTABLE' extensions if field n is of any | |
| other data type. | |
| KEYWORD: TSCALn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: real | |
| DEFAULT: 1.0 | |
| COMMENT: linear data scaling factor | |
| DEFINITION: This indexed keyword shall be used, along with the TZEROn | |
| keyword, when the quantity in field n does not represent a true | |
| physical quantity. The value field shall contain a floating point | |
| number representing the coefficient of the linear term in the equation, | |
| physical_value = TZEROn + TSCALn * field_value, which must be used to | |
| compute the true physical value of the field, or, in the case of the | |
| complex data types C and M, of the real part of the field with the | |
| imaginary part of the scaling factor set to zero. The default value | |
| for this keyword is 1.0. This keyword may not be used if the format of | |
| field n is A, L, or X. | |
| KEYWORD: TTYPEn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column name | |
| DEFINITION: The value field for this indexed keyword shall contain a | |
| character string, giving the name of field n. It is recommended that | |
| only letters, digits, and underscore (hexadecimal code 5F, ('_') be | |
| used in the name. String comparisons with the values of TTYPEn | |
| keywords should not be case sensitive. The use of identical names for | |
| different fields should be avoided. | |
| KEYWORD: TUNITn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column units | |
| DEFINITION: The value field shall contain a character string describing | |
| the physical units in which the quantity in field n, after any | |
| application of TSCALn and TZEROn, is expressed. The units of all FITS | |
| header keyword values, with the exception of measurements of angles, | |
| should conform with the recommendations in the IAU Style Manual. For | |
| angular measurements given as floating point values and specified with | |
| reserved keywords, degrees are the recommended units (with the units, | |
| if specified, given as 'deg'). | |
| KEYWORD: TZEROn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: real | |
| DEFAULT: 0.0 | |
| COMMENT: column scaling zero point | |
| DEFINITION: This indexed keyword shall be used, along with the TSCALn | |
| keyword, when the quantity in field n does not represent a true | |
| physical quantity. The value field shall contain a floating point | |
| number representing the true physical value corresponding to a value of | |
| zero in field n of the FITS file, or, in the case of the complex data | |
| types C and M, in the real part of the field, with the imaginary part | |
| set to zero. The default value for this keyword is 0.0. This keyword | |
| may not be used if the format of field n is A, L, or X. | |
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| KEYWORD: (blank) | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: descriptive comment | |
| DEFINITION: Columns 1-8 contain ASCII blanks. This keyword has no associated value. Columns 9-80 may contain any ASCII text. Any number of card images with blank keyword fields may appear in a header. | |
| KEYWORD: AUTHOR | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: author of the data | |
| DEFINITION: The value field shall contain a character string identifying who compiled the information in the data associated with the header. This keyword is appropriate when the data originate in a published paper or are compiled from many sources. | |
| KEYWORD: BITPIX | |
| REFERENCE: FITS Standard | |
| STATUS: manditory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: -64,-32,8,16,32 | |
| COMMENT: bits per data value | |
| DEFINITION: The value field shall contain an integer. The absolute value is used in computing the sizes of data structures. It shall specify the number of bits that represent a data value. | |
| KEYWORD: COMMENT | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: descriptive comment | |
| DEFINITION: This keyword shall have no associated value; columns 9-80 may contain any ASCII text. Any number of COMMENT card images may appear in a header. | |
| KEYWORD: DATE | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: date of file creation | |
| DEFINITION: The date on which the HDU was created, in the format specified in the FITS Standard. The old date format was 'yy/mm/dd' and may be used only for dates from 1900 through 1999. the new Y2K compliant date format is 'yyyy-mm-dd' or 'yyyy-mm-ddTHH:MM:SS[.sss]'. | |
| KEYWORD: DATE-OBS | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: date of the observation | |
| DEFINITION: The date of the observation, in the format specified in the FITS Standard. The old date format was 'yy/mm/dd' and may be used only for dates from 1900 through 1999. The new Y2K compliant date format is 'yyyy-mm-dd' or 'yyyy-mm-ddTHH:MM:SS[.sss]'. | |
| KEYWORD: EPOCH | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: real | |
| COMMENT: equinox of celestial coordinate system | |
| DEFINITION: The value field shall contain a floating point number giving the equinox in years for the celestial coordinate system in which positions are expressed. Starting with Version 1, the Standard has deprecated the use of the EPOCH keyword and thus it shall not be used in FITS files created after the adoption of the standard; rather, the EQUINOX keyword shall be used. | |
| KEYWORD: EQUINOX | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: real | |
| COMMENT: equinox of celestial coordinate system | |
| DEFINITION: The value field shall contain a floating point number giving the equinox in years for the celestial coordinate system in which positions are expressed. | |
| KEYWORD: HISTORY | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: none | |
| COMMENT: processing history of the data | |
| DEFINITION: This keyword shall have no associated value; columns 9-80 may contain any ASCII text. The text should contain a history of steps and procedures associated with the processing of the associated data. Any number of HISTORY card images may appear in a header. | |
| KEYWORD: INSTRUME | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of instrument | |
| DEFINITION: The value field shall contain a character string identifying the instrument used to acquire the data associated with the header. | |
| KEYWORD: NAXIS | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: [0:999] | |
| COMMENT: number of axes | |
| DEFINITION: The value field shall contain a non-negative integer no greater than 999, representing the number of axes in the associated data array. A value of zero signifies that no data follow the header in the HDU. In the context of FITS 'TABLE' or 'BINTABLE' extensions, the value of NAXIS is always 2. | |
| KEYWORD: NAXISn | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: any | |
| VALUE: integer | |
| RANGE: [0:] | |
| COMMENT: size of the axis | |
| DEFINITION: The value field of this indexed keyword shall contain a non-negative integer, representing the number of elements along axis n of a data array. The NAXISn must be present for all values n = 1,...,NAXIS, and for no other values of n. A value of zero for any of the NAXISn signifies that no data follow the header in the HDU. If NAXIS is equal to 0, there should not be any NAXISn keywords. | |
| KEYWORD: OBJECT | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of observed object | |
| DEFINITION: The value field shall contain a character string giving a name for the object observed. | |
| KEYWORD: OBSERVER | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: observer who acquired the data | |
| DEFINITION: The value field shall contain a character string identifying who acquired the data associated with the header. | |
| KEYWORD: ORIGIN | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: organization responsible for the data | |
| DEFINITION: The value field shall contain a character string identifying the organization or institution responsible for creating the FITS file. | |
| KEYWORD: REFERENC | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: bibliographic reference | |
| DEFINITION: The value field shall contain a character string citing a reference where the data associated with the header are published. | |
| KEYWORD: TDISPn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: display format | |
| DEFINITION: The value field of this indexed keyword shall contain a character string describing the format recommended for the display of the contents of field n. If the table value has been scaled, the physical value shall be displayed. All elements in a field shall be displayed with a single, repeated format. For purposes of display, each byte of bit (type X) and byte (type B) arrays is treated as an unsigned integer. Arrays of type A may be terminated with a zero byte. Only the format codes in Table 8.6, discussed in section 8.3.4 of the FITS Standard, are permitted for encoding. The format codes must be specified in upper case. If the Bw.m, Ow.m, and Zw.m formats are not readily available to the reader, the Iw.m display format may be used instead, and if the ENw.d and ESw.d formats are not available, Ew.d may be used. The meaning of this keyword is not defined for fields of type P in the Standard but may be defined in conventions using such fields. | |
| KEYWORD: TELESCOP | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: any | |
| VALUE: string | |
| COMMENT: name of telescope | |
| DEFINITION: The value field shall contain a character string identifying the telescope used to acquire the data associated with the header. | |
| KEYWORD: TFIELDS | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: table | |
| VALUE: integer | |
| RANGE: [0:999] | |
| COMMENT: number of columns in the table | |
| DEFINITION: The value field shall contain a non-negative integer representing the number of fields in each row of a 'TABLE' or 'BINTABLE' extension. The maximum permissible value is 999. | |
| KEYWORD: TFORMn | |
| REFERENCE: FITS Standard | |
| STATUS: mandatory | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column data format | |
| DEFINITION: The value field of this indexed keyword shall contain a character string describing the format in which field n is encoded in a 'TABLE' or 'BINTABLE' extension. | |
| KEYWORD: TNULLn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: integer or string | |
| COMMENT: value used to indicate undefined table element | |
| DEFINITION: In ASCII 'TABLE' extensions, the value field for this indexed keyword shall contain the character string that represents an undefined value for field n. The string is implicitly blank filled to the width of the field. In binary 'BINTABLE' table extensions, the value field for this indexed keyword shall contain the integer that represents an undefined value for field n of data type B, I, or J. The keyword may not be used in 'BINTABLE' extensions if field n is of any other data type. | |
| KEYWORD: TSCALn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: real | |
| DEFAULT: 1.0 | |
| COMMENT: linear data scaling factor | |
| DEFINITION: This indexed keyword shall be used, along with the TZEROn keyword, when the quantity in field n does not represent a true physical quantity. The value field shall contain a floating point number representing the coefficient of the linear term in the equation, physical_value = TZEROn + TSCALn * field_value, which must be used to compute the true physical value of the field, or, in the case of the complex data types C and M, of the real part of the field with the imaginary part of the scaling factor set to zero. The default value for this keyword is 1.0. This keyword may not be used if the format of field n is A, L, or X. | |
| KEYWORD: TTYPEn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column name | |
| DEFINITION: The value field for this indexed keyword shall contain a character string, giving the name of field n. It is recommended that only letters, digits, and underscore (hexadecimal code 5F, ('_') be used in the name. String comparisons with the values of TTYPEn keywords should not be case sensitive. The use of identical names for different fields should be avoided. | |
| KEYWORD: TUNITn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: string | |
| COMMENT: column units | |
| DEFINITION: The value field shall contain a character string describing the physical units in which the quantity in field n, after any application of TSCALn and TZEROn, is expressed. The units of all FITS header keyword values, with the exception of measurements of angles, should conform with the recommendations in the IAU Style Manual. For angular measurements given as floating point values and specified with reserved keywords, degrees are the recommended units (with the units, if specified, given as 'deg'). | |
| KEYWORD: TZEROn | |
| REFERENCE: FITS Standard | |
| STATUS: reserved | |
| HDU: table | |
| VALUE: real | |
| DEFAULT: 0.0 | |
| COMMENT: column scaling zero point | |
| DEFINITION: This indexed keyword shall be used, along with the TSCALn keyword, when the quantity in field n does not represent a true physical quantity. The value field shall contain a floating point number representing the true physical value corresponding to a value of zero in field n of the FITS file, or, in the case of the complex data types C and M, in the real part of the field, with the imaginary part set to zero. The default value for this keyword is 0.0. This keyword may not be used if the format of field n is A, L, or X. |
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