1 Language CLARK : Perform a CLARK clean FIT : Fit the dirty beam HOGBOM : Perform a normal clean LOAD : Load a variable for RGMAP and PLOT MOSAIC : Toggle the mosaic mode MRC : Multi-Resolution Clean READ : Read the input files SDI : Steer-Dewdney-Ito Clean SUPPORT : Define the support for cleaning UV_FLAG : Interactively flag UV data UV_MAP : Construct a map from UV data UV_SHOW : Display UV data UV_SORT : Sort and Transpose UV data for plotting UV_STAT : Analyze UV data set for beam sizes and noise properties WIPE : Regularized Deconvolution WRITE : Save the cleaned or residual images 1 CLARK [CLEAN\]CLARK [Plane] [/PLOT Clean|Residu] [/FLUX Min Max] Clean the specified plane (default: plane specified by variable FIRST) with the B.Clark method. If option /PLOT is given, a display of the CLEAN or RESIDUAL map will be shown at each major cycle, depending on the argument (default Residual), and the user will be prompted for continuation. Option /FLUX can be used to give the limit for the display of the cumulated clean flux as a function of number of components. In mosaic mode (See command MOSAIC), a mosaic clean is performed. 1 FIT [CLEAN\]FIT [Field] Fit the dirty beam to obtain the clean beam parameters. This is done automatically by CLARK, HOGBOM, MRC and SDI if needed. Clean beam parameters can also be specified by the users, by setting the variables MAJOR_AXIS, MINOR_AXIS and ANGLE. In this case, no automatic fit will be perform by CLARK, HOGBOM, MRC and SDI. In mosaic mode, you can specify on which field the fit has to be made, using the first argument. 1 HOGBOM [CLEAN\]HOGBOM [Plane] [/FLUX Fmin Fmax] Clean the specified plane (default: plane specified by variable FIRST) with the standard Hogbom method. The cumulative cleaned flux is displayed in real time while cleaning goes on in an additional window. Option /FLUX can be used to give the limits in flux for this display. Cleaning can be interrupted by pressing C at any time. In mosaic mode (See command MOSAIC), a mosaic clean is performed. 1 LOAD [CLEAN\]LOAD Variable Define Variable (CLEAN, DIRTY, RESIDUAL and BEAM) to be the item to be plotted (for RGMAP and PLOT for example). Used in particular by the procedure @ PR:P_PLOT Variable [First [[Last]] which will plot all channels of the specified variable. This procedure is available simply by typing SHOW Variable [First [[Last]] First (default 0) and Last (default First) are optional arguments indicating the first and last channel to be displayed. If not specified the variables FIRST and LAST of the INPUT macro are used. Several variables control the aspect of the display. DO_CONTOUR indicates whether contour levels should be drawn, DO_BIT whether bitmap should be displayed. 1 MOSAIC [CLEAN\]MOSAIC On|Off Turn on or off the mosaic mode. Note that a READ PRIMARY command switches automatically in mosaic mode. The program prompt changes to inform the user. 1 MRC [CLEAN\]MRC [Plane] [/PLOT Clean|Residu] [/FLUX Min Max] [/RATIO Irat] Perform a Multi-Resolution CLEAN on the current dirty image. Seems operational since version 2.0 of MAPPING. If option /PLOT is given, a display of the CLEAN or RESIDUAL map will be shown at each major cycle, depending on the argument (default Residual), and the user will be prompted for continuation. Option /FLUX can be used to give the limit for the display of the cumulated clean flux as a function of number of components. A summary plot with the Difference, Smooth, and total CLEANed maps is displayed at the end. Option RATIO can be used to specify the smoothing factor, which must be a power of 2. The default is estimated from the image size. MRC does not support mosaics yet. 1 READ [CLEAN\]READ Variable File [/PLANE First Last] Read the specified variable (UV, BEAM, DIRTY, CLEAN or PRIMARY) from input File. First and last planes read in can be specified using option /PLANE (valid also for UV tables). 1 SDI [CLEAN\]SDI [Plane] [/PLOT Clean|Residu] Perform a Steer-Dewdney-Ito CLEAN. This clean method selects an ensemble of clean components and remove them at once using FFTs. It works best for extended sources and UV coverages with short spacings. In such a case, it may avoid the "ringing" features which appear using the CLARK or HOGBOM techniques. In mosaic mode (See command MOSAIC), a mosaic clean is performed. 1 SUPPORT [CLEAN\]SUPPORT [Polygon] [/CURSOR] [/PLOT] Define the support function for CLEAN components. Calls command POLYGON of GREG to do that. See HELP POLYGON for details. With option /CURSOR, it calls the interactive cursor to define the polygon summits. Type any key to go to next summit, D to correct the last one and type E to end the polygon definition. The last polygon side will then appear. The polygon definition may be aborted by typing Q. For X11 displays, you may use the mouse buttons for the commands. The left mouse button draws a vertex, the middle mouse button deletes the last vertex, and the right mouse button ends the polygon definition. 1 UV_FLAG [CLEAN\]UV_FLAG Display UV data and calls the cursor to interactively select a region where UV data will be flagged. The parameters for the display are as in UV_SHOW. Subsequent mapping with UV_MAP will ignore flagged data. Unflagging can only be done by re-loading the UV data set with command READ UV. UV data flagged using command UV_FLAG can be saved on file with command WRITE UV File. 1 UV_MAP [CLEAN\]UV_MAP Compute a dirty map and beam from the UV data. UV data should have been loaded by command READ UV File. Parameters are specified through SIC variables as for the Task UV_MAP: use command INFO for the list. 1 UV_SHOW [CLEAN\]UV_SHOW Display UV data loaded by command READ UV File. Control parameters are available as SIC variables. Use command INPUT UV_SHOW to check them. Flagged UV data will appear in a different color. 1 UV_SORT [CLEAN\]UV_SORT Order Sort and transpose the UV data set, loaded by command READ UV File. Order is either TIME for Time-Baseline ordering, BASE for Baseline-Time ordering. The sorted UV data is then available in variable UVS for further plotting. 1 UV_STAT [CLEAN\]UV_STAT Keyword [Step Start] Perform analysis of the UV data set to predict the synthesized beam, expected noise level, and recommended pixel size for UV_MAP. Keyword can be TAPER, WEIGHT, or CELL. For TAPER, beam sizes and noise level (in flux and brightness) will be computed for 9 different tapers (from Start to Start*Step^9). Default value for Step is sqrt(2), Default value for Start is 50 m. Weighting mode, UV cell size and "robust" parameter are taken from variable UV_CELL. For WEIGHT, beam sizes and noise level (in flux and brightness) will be computed for 9 different "robust" weighting parameters (from Start to Start*Step^9). Default value for Step is sqrt(10), and default value for Start is derived to center the "robust" parameter values around 1. UV cell size is taken from variable UV_CELL[1], and Taper is taken from variable UV_TAPER. For CELL, beam sizes and noise level are computed for 9 different UV cell sizes. That version is still under development. UV_STAT allows the astronomer to select the best weighting parameters according to its personnal tradeoff between angular resolution and sensitivity. 1 WIPE [CLEAN\]WIPE Starts the WIPE deconvolution method. WIPE is a deterministic deconvolution method using CLEAN as a starting point. WIPE applies a regularization principle and provides error analysis on the deconvolution process. A strategy is defined in WIPE to build automatically the effective support of the object under observation. However a starting support (analog to a Clean Box) can be defined to restrict the search. 1 WRITE [CLEAN\]WRITE Variable File WRITE the specified variable (CLEAN, RESIDUAL, DIRTY, BEAM, SUPPORT, UV) onto a File. 1 END