casa5
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Ville Suoranta authored 92c0a4d9acf Merge
| 1865 1865 | <description>Mask string (image name or region file or region string) |
| 1866 1866 | --> |
| 1867 1867 | The name of a CASA image or region file or region string that specifies |
| 1868 1868 | a 1/0 mask to be used for deconvolution. Only locations with value 1 will |
| 1869 1869 | be considered for the centers of flux components in the minor cycle. |
| 1870 1870 | If regions specified fall completely outside of the image, tclean will throw an error. |
| 1871 1871 | |
| 1872 1872 | Manual mask options/examples : |
| 1873 1873 | |
| 1874 1874 | mask='xxx.mask' : Use this CASA image named xxx.mask and containing |
| 1875 - | ones and zeros as the mask. If this image is a different |
| 1876 - | shape from what is being made it will be resampled to |
| 1875 + | ones and zeros as the mask. <!--If this image is a different |
| 1876 + | spatial coordinates from what is being made it will be resampled to |
| 1877 1877 | the target coordinate system before being used. |
| 1878 1878 | When a continuum (single channel) mask is given for spectral |
| 1879 1879 | cube imaging, it will be extended (copied) to all channels. |
| 1880 1880 | Similarly, when a Stokes I mask is given, it will be extended |
| 1881 1881 | to multi-Stokes imaging. Extension of a cube stokes I mask |
| 1882 1882 | to other Stokes planes is possible only if the spectral |
| 1883 1883 | coordinate and the number of the channels matches with the output |
| 1884 1884 | image. |
| 1885 + | --> |
| 1886 + | If the mask is only different in spatial coordinates it will be |
| 1887 + | resampled to the target coordinate system before being used. |
| 1888 + | The mask has to have the same shape in velocity and Stokes planes |
| 1889 + | as the output image. Exceptions are single velocity and/or single |
| 1890 + | Stokes plane masks. They will be expanded to cover all velocity and/or |
| 1891 + | Stokes planes of the output cube. |
| 1885 1892 | |
| 1886 1893 | [ Note : If an error occurs during image resampling or |
| 1887 1894 | if the expected mask does not appear, please try |
| 1888 1895 | using tasks 'imregrid' or 'makemask' to resample |
| 1889 1896 | the mask image onto a CASA image with the target |
| 1890 1897 | shape and coordinates and supply it via the 'mask' |
| 1891 1898 | parameter. ] |
| 1892 1899 | |
| 1900 + | |
| 1893 1901 | mask='xxx.crtf' : A text file with region strings and the following on the first line |
| 1894 1902 | ( #CRTFv0 CASA Region Text Format version 0 ) |
| 1895 1903 | This is the format of a file created via the viewer's region |
| 1896 1904 | tool when saved in CASA region file format. |
| 1897 1905 | |
| 1898 1906 | mask='circle[[40pix,40pix],10pix]' : A CASA region string. |
| 1899 1907 | |
| 1900 1908 | mask=['xxx.mask','xxx.crtf', 'circle[[40pix,40pix],10pix]'] : a list of masks |
| 1901 1909 | |
| 1902 1910 | |