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Дата изменения: Unknown Дата индексирования: Sun Apr 10 19:47:37 2016 Кодировка: Поисковые слова: uv |
Task: psrbl Purpose: Subtract off-pulse uv baseline Categories: uv analysis PSRBL subtracts the off-pulse bins (the baseline) of visibilities from the on-pulse bins of the visibilities, to remove continuum sources. Note: Although PSRBL does an excellent job of removing continuum sources, it has the side-effect of scattering noise OUT OF the off-pulse bins and INTO the on-pulse bins. For weak sources, this can make plots made with PSRPLT, mode=amplitude look artifically significant (or just plain strange). To moderate this effect, always set the binsl key to cover all the available off-pulse bins. Key: vis The name of the input uv data sets. Several can be given. No default. Key: select The normal uv selection commands. The default is copy everything. See the help on select for more information. Key: binsl Bin selection to use for the baseline. This should consist of comma-separated start/stop pairs, eg. binsl = 1,14,17,32 In this example, the pulsar is detected in bins 15 and 16, so all other bins (1-14 and 17-32) are used for the baseline. To select a single bin, use eg. 1,1 Key: out The name of the output uv data set. No default. Key: options Extra processing options. Several can be given, separated by commas. Minimum match is supported. nocal This option suppresses antenna gain calibration. The default behaviour is to apply antenna calibration. nopol This option suppresses polarisation calibration. The default behaviour is to apply polarisation calibration. nopass This option suppresses bandpass calibration. The default behaviour is to apply bandpass calibration.