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Calibrator Selection Tool

This is selected via the Toolbar or by choosing Tool $\rightarrow$ ALMA Calibrator Selection Tool... . The calibratorquery dialog is used to select sources from the ALMA calibratorcatalogue and to fine-tune calibrator selection criteria. It is shownin Figure  5.2 . Please note that this tool is not available forconstructing Phase-1 Science Goals.

Figure 5.2: The Calibrator Selection Tool.
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Calibrators are found by matching a set of searchcriteria , consisting of a set of minimum andmaximum values for the frequency, flux and time since lastobservation, and the centre position and search radius fields for acone search within the circle of the radius specified, centered on theRight Ascension and Declination. By default, these fields are all setto zero and therefore disabled and a minus sign icon is displayed. Toenable a constraint, enter a non-zero value into a field; a plus signicon is displayed.

Once you have entered your desired search constraints, the set ofcalibrators that currently match your constraint can be found byclicking the Submit Query button. The matching calibrators willbe displayed in the table below. Results can be sorted by column byclicking on the column header.

Although the tool can be used to query for calibrators, addingcalibrators can only be done in aScheduling Block of a Phase 2 Observing Program. If so, the button Select As... will be enabled that provides you with a dialog boxto further specify usage of the calibrator after its selection. Thedialogue box consist of two parts. With Calibrator type one canspecify for which calibrations the selected calibrator is to be used(amplitude, phase, etc.). On the right the user can specify whichSpectralSpec should be attached to the calibration source.

For the selected calibrator, the Calibration Tool will add one sourceto the Target folder and attach aFieldSource and an Observing Parametersset . On the right in the dialog box, Copy to new setup will create a copy of the science source'sSpectralSpec and attach this to the calibration source. Link to same setup will attach the science SpectralSpec to the calibrationsource. Do nothing will not create a SpectralSpec for thecalibration source. Note that a SpectralSpec can only be copied orcreated when it exists.

For details how to add a calibration source to a Scheduling Block please see Section  8.3.2 .

Figure 5.3: The LO Configuration Tool.
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next up previous contents index
Next: LO Configuration Tool Up: Tools Previous: Save and Open a   Contents   Index
The ALMA OT Team, 2011 May 20