INNAME Input file name (name) INCLASS Input file name (class) INSEQ 0.0 9999.0 Input file name (seq. #) INDISK 0.0 9.0 Input file disk unit # INEXT Input table type. INVERS 0.0 46655.0 Input table version #. OUTVERS 0.0 46655.0 Output table version #. BCOUNT 0.0 99999.0 Beginning row to flag ECOUNT 0.0 99999.0 Last row to flag: 0 => end OPTYPE Type of comparison:'>','>=' '=','<>','<=','<' APARM Column selection parameters: 1: L-side col A, no default 2: L-side col A subscript 3: L-side col B, no default 4: L-side col B subscript 5: L-side function type SEE the HELP ! 6: R-side col A, no default 7: R-side col A subscript 8: R-side col B, no default 9: R-side col B subscript 10: R-side function type BPARM Control parameters: 1: > 0 => use constant for R-side 2: This constant 3: Okay uncertainty in = and <> tests. 4: > 0 => remove previous flagging 9: Exponent for L-side 10: Exponent for R-side CPARM 1: L-side col A factor 2: L-side col A offset 3: L-side col B factor 4: L-side col B offset 5: R-side col A factor 6: R-side col A offset 7: R-side col B factor 8: R-side col B offset 9: L-side overall factor 10: L-side overall offset

TAFLG Type: Task Use: Copies data from an AIPS table-format extension file to a new table extension file flagging rows having specified parameters. It can write over the input table file. The decision about flagging is made in rows BCOUNT - ECOUNT by computing a function of one or two columns (the "L-side") and comparing the result with an OPTYPE comparison to a constant (BPARM(1) > 0) or to a 2nd function of one or two more columns (the "R-side"). If the result of the comparison is true, then the row is flagged or unflagged (BPARM(4) > 0). If all you want to do is flag rows BCOUNT through ECOUNT, set OPTYPE='>'; APARM=0; BPARM=1,0 and decide what you want with INVERS and OUTVERS. Adverbs: INNAME.....Input file name (name) Standard defaults. INCLASS....Input file name (class) Standard defaults. INSEQ......Input file name (seq. #) 0 => highest. INDISK.....Disk drive # of input file. 0 => any. INEXT......Type of input table extension. ' ' = 'CC' INVERS.....Version number of input table extension. 0 => highest. OUTVERS....Version number of output table extension. 0 => highest + 1. BCOUNT.....Beginning row number to be included in flagging. ECOUNT.....Last row number included in flagging. 0 = highest. All rows are copied however. OPTYPE.....The logical result ofOPTYPE determines whether a row is flagged. OPTYPE may be '> ', '>= ', '= ', '<> ' (not equal), '<= ', or '< '. APARM......Column selection parameters: 1 = L-side logical column number A: 0 => row number. < 0 => use absolute value of col. abs(APARM(1)) 2 = L-side subscript of column A data to use if the column is an array. 0 => 1. 3 = L-side logical column number B: 0 => row number. < 0 => use absolute value of col. abs(APARM(1)) 4 = L-side subscript of column B data to use if the column is an array. 0 => 1. 5 = L-side function number: Various functions may be performed on column A only or on a pair of columns A and B before comparison. Functions which use column A only are 0 = no function, 1 = sum, 2 = asin, 3 = Log10, 4 = ln, 5 = exp, 6 = sin, 7 = cos, 8 = tan, 9 = atan. In these cases, APARM(3) and (4) are ignored. Sum includes those rows which are not flagged due to BCOUNT. Functions which use both columns are 10 = +, 11 = -, 12 = *, 13 = /, 14 = **, 15 = mod, 16 = Modulus, 17 = atan2, 18 = max, and 19 = min. 6 = R-side logical column number A: as for L-side. 7 = The subscript of the R-side column A data to use if the column is an array. 0 => 1. 8 = R-side logical column number B: as for L-side. 9 = The subscript of the R-side column B data to use if the column is an array. 0 => 1. 10 = R-side function number: as for L-side. The R-side parms 6-10 are ignored if BPARM(1) > 0. BPARM......Control parameters: 1 = Flag to set R-side to a constant: > 0 use BPARM(2) as a constant R-side; <= 0 compute the function specified in APARM(6) - APARM(10) as the R-side. 2 = The constant comparison value for the R-side (used only if (BPARM(1) > 0). 3 = For '=' and '<>' tests on floating-point columns or floating-point function results, the allowed difference between the L-side value and the R-side value to be regarded as "equal", i.e. if ABS(L-side - R-side) < BPARM(3) then L-side and R-side are considered equal. 4 = <= 0 implies flag the row having the specified parms. > = implies remove flagging from those rows previously flagged which have the specified parms. 9 = The exponent to which to take the L-side result value before final scaling and comparison. 0 => 1. 10 = The exponent to which to take the R-side result value before comparison. 0 => 1. CPARM......After the value or absolute value of a column is found, it may be scaled and offset before other functions are applied to it. Similarly, the result on the L side (only) may also be scaled and offset before comparison with the R-side. 1 = L-side logical column number A scale factor: 0 -> 1. 2 = L-side logical column number A offset. 3 = L-side logical column number B scale factor: 0 -> 1. 4 = L-side logical column number B offset. 5 = R-side logical column number A scale factor: 0 -> 1. 6 = R-side logical column number A offset. 7 = R-side logical column number B scale factor: 0 -> 1. 8 = R-side logical column number B offset. 9 = L-side OVERALL result scale factor. 0 -> 1. 10 = L-side OVERALL result offset. 0 -> 1.

TAFLG FUNCTION TAFLG applies some function to one or two columns of an input table extension file and compares the results to some constant given in BPARM(2) or to the result of some other function of one or two more rows. Those rows for which the comparison is true in the desired way (OPTYPE) are flagged in the output file written by the task. For example: we wish to flag all rows in a CC (clean components) table which have negative flux: GETN nnn INEXT = 'CC'; INVERS = 1; OUTVERS = 2 APARM = 1, 1, 0, 0, 0 ; OPTYPE = '<' BPARM = 1, 0, 0, -1 ; CPARM = 0 GO TAFLG To reverse the process for components less than -1 mJy: INEXT = 'CC'; INVERS = 2; OUTVERS = 3 APARM = 1, 1, 0, 0, 0; OPTYPE = '<' BPARM = 1, -0.001, 0, 1 ; CPARM = 0 GO TAFLG To give an unrealistic example to illustrate the possibilities, Let us flag all rows for which the component radius converted to arc seconds is greater than or equal twice the square root of the product of the row number minus one and the absolute component flux: GETN nnn INEXT = 'CC'; INVERS = 1; OUTVERS = 2 OPTYPE = '>=' APARM = 2, 1, 3, 1, 16, 0, 1, -1, 1, 12 BPARM = -1, 0, 0, -1; BPARM(10) = 0.5 CPARM = 3600, 0, 3600, 0, 1, -1, 1, 0, 2, 0 GO TAFLG