![]() With the specified XTENSION, EXTNAME, EXTVER, andĮXTLEVEL will be read. ![]() If EXTEN_NO is specified, XTENSION,ĮXTNAME, EXTVER, and EXTLEVEL parameters are ignored.Ĭase 2: if EXTEN_NO is not specified, the first extension EXTEN_NO will give the number of theĮxtension to read. The header will haveīEGIN MAIN HEADER -īEGIN EXTENSION HEADER -ĮNUM - Output extension number that was read.ĭetermination or which extension to read.Ĭase 1: EXTEN_NO specified. Parameter is not supplied, the primary data unit headerĪnd the extension header will be combined. If an extension is read, and the /NO_PDU keyword If /DATA_ONLY is specified, no scaling is done. The user can use the IDLįunction REFORM to convert the data to the correct dimensions If Keywords FIRST and LAST are used to read a portion of theĭata or the heap portion of an extension, no scaling is doneĪnd data is returned as a 1-D vector. (if present in the header) will not be used to scale the data. If /NOSCALE is specified, BSCALE and BZERO More efficient for the user to call FITS_OPEN and leave theĭATA - data array. When multiple extensions are to be read from the file, it is ![]() IfĪ file name is supplied, FITS_READ will open the file withįITS_OPEN and close the file with FITS_CLOSE before exiting. ![]() Returned by FITS_OPEN or the file name of the FITS file. FITS_READ, filename_or_fcb, data įILENAME_OR_FCB - this parameter can be the FITS Control Block (FCB)
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