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Knowledgebase: ALMA Observing Tool (OT)
How do I load a list of sources or pointings into the OT?
Posted by Nathan Brunetti, Last modified by Sarah Wood on 17 April 2018 07:51 PM

You can load multiple sources into a Science Goal using an ASCII file stored on your local disk. For each target, the text file must contain a list of comma-separated entries according to the following template:

Name, RA(sexagesimal), Dec(sexagesimal), PMRA(mas/yr), PMDec(mas/yr), vel(km/s), velocity reference frame [bar,lsrk,topo,hel,lsr], Doppler type[RADIO,OPTICAL,RELATIVISTIC], peak cont flux(mJy), peak line flux(mJy), cont pol(%), line pol(%), line width(km/s), cont circular pol (%), line circular pol (%) --   This signals end of the header
ngc253, 00:47:33.134, -25:17:19.68, 0.0, 0.0, 258.688, lsrk, RADIO, 200, 1000, 2, 0, 1500, 0, 0
ngc1068, 02:42:40.771, -00:00:47.84, 0.0, 0.0, 1142.075, topo, OPTICAL, 1100.0, 30, 0, 0, 20, 0, 0

The file is loaded in from the "Field Setup" page by using the "Load from File" button. You can also generate your own template by entering a source into the OT's "Field Setup" view, clicking on the "Export to File" button, and saving the resulting file to disk. You can then use this template to add additional sources and load it back in as described above.

Loading sources from an ASCII file works for both 'Individual Pointing(s)' and '1 Rectangular Field'. The above procedure will allow you to load only the source information (including the field centre coordinates, velocity information and expected source properties). If the default 'Individual Pointing(s)' target type is selected one pointing at the field centre will be generated by default, any additional offset pointings must be defined either interactively in the OT or imported from a file (see below). If you want to define '1 Rectangular Field' for each source you must select this target type with the radio button before loading the sources from a file; you will then be able to define the rectangle for each source individually in the OT.

For target type 'Individual Pointing(s)' you can load individual offset (or custom mosaic) pointings on a per-source basis using the "Import" button below the pointings table. The format of the required ASCII file is

RA , Dec, Coordinate Type[Absolute,Offset], Coordinate Units
--   This signals end of the header
 04:31:38.4369, 18:13:57.651,Absolute,SEXAGESIMAL
 04:31:40.5426, 18:13:57.650,Absolute,SEXAGESIMAL
 04:31:36.3312, 18:13:57.650,Absolute,SEXAGESIMAL

The Coordinate Units can be SEXAGESIMAL, DEGREES, RADIANS for Coordinate Type Absolute and ARCSECS, ARCMINS, DEGREES for Coordinate Type Offset.

For more information, please check the ALMA OT User Manual, Import/Export of Source Information

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