funmerge(1) [debian man page]
funmerge(1) SAORD Documentation funmerge(1) NAME
funmerge - merge one or more Funtools table files SYNOPSIS
funmerge [-w|-x] -f [colname] <iname1> <iname2> ... <oname> OPTIONS
-f # output a column specifying file from which this event came -w # adjust position values using WCS info -x # adjust position values using WCS info and save old values DESCRIPTION
funmerge merges FITS data from one or more FITS Binary Table files or raw event files. The first argument to the program specifies the first input FITS table or raw event file. If "stdin" is specified, data are read from the standard input. Use Funtools Bracket Notation to specify FITS extensions and row filters. Subsequent arguments specify additional event files and tables to merge. (NB: Stdin cannot not be used for any of these additional input file arguments.) The last argument is the out- put FITS file. The columns in each input table must be identical. If an input file begins with the '@' character, it is processed as an include file, i.e., as a text file containing event file names (as well as blank lines and/or comment lines starting with the '#' sign). If standard input is specified as an include file ('@stdin'), then file names are read from the standard input until EOF (^D). Event files and include files can be mixed on a command line. Rows from each table are written sequentially to the output file. If the switch -f [colname] is specified on the command line, an addi- tional column is added to each row containing the number of the file from which that row was taken (starting from one). In this case, the corresponding file names are stored in the header parameters having the prefix FUNFIL, i.e., FUNFIL01, FUNFIL02, etc. Using the -w switch (or -x switch as described below), funmerge also can adjust the position column values using the WCS information in each file. (By position columns, we mean the columns that the table is binned on, i.e., those columns defined by the bincols= switch, or (X,Y) by default.) To perform WCS alignment, the WCS of the first file is taken as the base WCS. Each position in subsequent files is adjusted by first converting it to the sky coordinate in its own WCS coordinate system, then by converting this sky position to the sky position of the base WCS, and finally converting back to a pixel position in the base system. Note that in order to perform WCS alignment, the appropriate WCS and TLMIN/TLMAX keywords must already exist in each FITS file. When performing WCS alignment, you can save the original positions in the output file by using the -x (for "xtra") switch instead of the -w switch (i.e., using this switch also implies using -w) The old positions are saved in columns having the same name as the original positional columns, with the added prefix "OLD_". Examples: Merge two tables, and preserve the originating file number for each row in the column called "FILE" (along with the corresponding file name in the header): [sh] funmerge -f "FILE" test.ev test2.ev merge.ev Merge two tables with WCS alignment, saving the old position values in 2 additional columns: [sh] funmerge -x test.ev test2.ev merge.ev This program only works on raw event files and binary tables. We have not yet implemented image and array merging. SEE ALSO
See funtools(7) for a list of Funtools help pages version 1.4.2 January 2, 2008 funmerge(1)
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funsky(1) SAORD Documentation funsky(1) NAME
funsky - convert between image and sky coordinates SYNOPSIS
funsky iname[ext] # RA,Dec (deg) or image pix from stdin funsky iname[ext] [lname] # RA, Dec (deg) or image pix from list funsky iname[ext] [col1] [col2] # named cols:units from stdin funsky iname[ext] [lname] [col1] [col2] # named cols:units from list OPTIONS
-d # always use integer tlmin conversion (as ds9 does) -r # convert x,y to RA,Dec (default: convert RA,Dec to x,y) -o # include offset from the nominal target position (in arcsec) -v # display input values also (default: display output only) -T # output display in rdb format (w/header,tab delimiters) DESCRIPTION
Funsky converts input sky coordinates (RA, Dec) to image coordinates (or vice versa) using the WCS information contained in the specified FITS file. Several calling sequences are supported in order to make it easy to specify coordinate positions in different ways. The first required argument is always the input FITS file (or extension) containing the WCS information in an extension header. Note that the data from this file is not used. By default, the program converts input RA and Dec values to X and Y using this WCS information. If the WCS is associated with a FITS image, then the X,Y values are image values. If the WCS is associated with a binary table, then the X, Y val- ues are physical values. To convert X,Y to RA and Dec, use the -r (reverse) switch. If no other command arguments are supplied, then the input positions are read from the standard input. Each line is assumed to contain a single coordinate position consisting of an RA in hours (or X in pixels) followed by a Dec in degrees (or Y in pixels). The usual delim- iters are supported (spaces, commas, tabs). For example: # read from stdin, default column names and units [sh] funsky snr.ev 22.982695 58.606523 # input RA (hrs), Dec(deg) 510.00 510.00 22.982127 58.607634 # input 512.00 510.50 22.981700 58.614301 # input 513.50 513.50 ^D # end of input If a second argument is supplied, this argument is assumed to be a file containing RA (X) and Dec (Y) positions. The file can either be an ASCII table or a FITS binary table. The order of columns is unimportant, if the table has a column header. In this case, the names of the columns must be one of "RA", "DEC", or "X", "Y" for sky to image and image to sky conversions, respectively. If the table has no header, then once again, RA (X) is assumed to first, followed by DEC (Y). For example: # read from file, default column names and units [sh] cat hd.in RA DEC --------- --------- 22.982695 58.606523 22.982127 58.607634 22.981700 58.614301 [sh] funsky snr.ev hd.in 510.00 510.00 512.00 510.50 513.50 513.50 If three arguments are supplied, then the input positions again are read from the standard input. Each line is assumed to contain a single coordinate position consisting of an RA (or X in pixels) followed by a Dec (or Y in pixels), with the usual delimiters supported. However, the second and third arguments now specify the column names and/or sky units using a colon-delimited syntax: [colname]:[h|d|r] If the colname is omitted, the names default to "RA", "DEC", "X", "Y", "COL1", or "COL2" as above. If the units are omitted, the default is hours for RA and degrees for Dec. When the -r switch is used (convert from image to sky) the units are applied to the output instead of the input. The following examples will serve to illustrate the options: # read from stdin, specifying column names (def. units: hours, degrees) [sh] cat hd.in MYRA MYDEC --------- --------- 22.982695 58.606523 22.982127 58.607634 22.981700 58.614301 [sh] funsky snr.ev MYRA MYDEC < hd.in 510.00 510.00 512.00 510.50 513.50 513.50 # read from stdin, specifying column names and units [sh] cat dd.in MYRA MYDEC --------- --------- 344.740432 58.606523 344.731900 58.607634 344.725500 58.614301 [sh] funsky snr.ev MYRA:d MYDEC:d < dd.in 510.00 510.00 512.00 510.50 513.50 513.50 # read stdin, convert image to sky, specifying output sky units [sh] cat im.in 510.00 510.00 512.00 510.50 513.50 513.50 [sh] cat im.in | funsky -r snr.ev :d :d 344.740432 58.606523 344.731900 58.607634 344.725500 58.614301 Finally, four command arguments specify both and input file and column names and/or units: [sh] cat dd.in MYRA MYDEC --------- --------- 344.740432 58.606523 344.731900 58.607634 344.725500 58.614301 [sh] funsky snr.ev dd.in MYRA:d MYDEC:d 510.00 510.00 512.00 510.50 513.50 513.50 # read file, convert image to sky, specifying output sky units [sh] cat im.in 510.00 510.00 512.00 510.50 513.50 513.50 [sh] funsky -r snr.ev im.in :d :d 344.740432 58.606523 344.731900 58.607634 344.725500 58.614301 By default, the output of funsky consists only of the converted coordinate position(s), one per output line. This makes parsing in shell scripts easy. Use the -v (verbose) switch to specify that the input coordinates should be pre-pended to each line. For example: [sh] cat dd.in MYRA MYDEC --------- --------- 344.740432 58.606523 344.731900 58.607634 344.725500 58.614301 [sh] funsky snr.ev dd.in MYRA:d MYDEC:d 510.00 510.00 512.00 510.50 513.50 513.50 [sh] funsky -v snr.ev dd.in MYRA:d MYDEC:d 344.740432 58.606523 510.00 510.00 344.731900 58.607634 512.00 510.50 344.725500 58.614301 513.50 513.50 In addition, a full starbase table can be output using the -T (table) switch. This switch can be used with or without the -v switch. If the -T and -v are both specified, then a descriptive header parameters are output before the table (mainly to remind you of the sky units): # output table in non-verbose mode [sh] funsky -T snr.ev dd.in MYRA:d MYDEC:d X Y ------------ ------------ 510.00 510.00 512.00 510.50 513.50 513.50 # output table in verbose mode [sh] funsky -T -v snr.ev dd.in MYRA:d MYDEC:d # IFILE = /Users/eric/data/snr.ev # ICOL1 = MYRA # ICOL2 = MYDEC # IUNITS1 = d # IUNITS2 = d # OCOL1 = X # OCOL2 = Y MYRA MYDEC X Y ------------ ------------ ------------ ------------ 344.740432 58.606523 510.00 510.00 344.731900 58.607634 512.00 510.50 344.725500 58.614301 513.50 513.50 Finally, the -d (ds9) switch mimicks ds9's use of integer TLMIN and TLMAX values for all coordinate transformations. FITS conventions seem to call for use of floating point TLMIN and TLMAX when the data are floats. This convention is followed by funsky but results in a small discrepancy with ds9's converted values for floating point data. We will remedy this conflict in the future, maybe. SEE ALSO
See funtools(7) for a list of Funtools help pages version 1.4.2 January 2, 2008 funsky(1)