Sample Map-making MAPPING session

A basic session to make maps with MAPPING is the following

CLEAN\READ UV  file.uvt          ! 1
CLEAN\UV_STAT WEIGHT             ! 2
SIC\LET MAP_CELL 0.5             ! 3
SIC\LET MAP_SIZE 128             ! 4
CLEAN\UV_MAP                     ! 5
CLEAN\FIT                        ! 6
GTVL\DEVICE IMAGE                ! 7
SHOW DIRTY                       ! 8
...                              ! 9
CLEAN\UV_FLAG                    ! 10
CLEAN\UV_MAP                     ! 11
...                              ! 12
CLEAN\WRITE DIRTY file.lmv       ! 13
CLEAN\WRITE BEAM  file.beam      ! 14

1.

Read the UV table from file ``file.uvt''

2.

Analyse the UV data set to select appropriate weighting parameter and pixel size.

3.

Specify the pixel size in arcseconds

4.

Specify the map size in pixels

5.

Make the map and beam. All other UV_MAP parameters can be listed by command INPUT UV_MAP

6.

Determine the size of the dirty beam

7.

Connect to an X-Window terminal for colour display

8.

Show a bitmap of the dirty image. SHOW is a symbol defined to execute a command procedure which plots the image.

9.

Iterate points 4, 5 and 8 until you are satisfied with the result.

10.

Possibly flag some UV data points.

11.

And recompute the map and beam.

12.

If needed Iterate points 10 and 11

13.

And once you are happy, write the dirty image

14.

and beam on files.

Instead of point 13 and 14, you may directly proceed within MAPPING to the Cleaning stage.