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Expected Source Properties

Once the source position and velocity information has been completed, details of the source brightness, polarization (linear and/or circular) and line widths should be added. These numbers are used mostly for technical assessment of the proposal and as such are used extensively in the information presented to the user in the Technical Justification node (Section 5.3.6).

All the relevant values should be filled in, even if exact quantities are not known - reasonable estimates should be entered. Which fields should be filled in depends on the type of observation being created and the OT will issue a validation error if, for example, a line width is not entered for a spectral line project, or a polarization percentage is not given when full polarization has been selected. For spectral-line projects, a spectral line flux is mandatory and this should always be entered relative to the continuum (if any). If the line is in absorption, the depth of the line relative to the continuum should be entered as a positive flux density.

For solar observing, the source property panel looks very different. Here, all that is requested is an assesment of whether the solar feature being observed corresponds to an ``active'' or a ``quiet'' Sun. This will be used to select the corect debiasing mode when observing.


next up previous contents
Next: Field definitions Up: Field Setup Previous: Resolving source information   Contents
The ALMA OT Team, 2018 Sep 25