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Figure 6.9:
The
Field Source
Panel of the Scheduling Block Field Sources Form
. |
-
Field Source Name
: A user-settable name for the Field Source - allows the user to identify a particular setup. This name can be different from the source name, e.g. "NGC1068 nucleus".
-
Source Name
: The source name. Typically obtained from a catalogue.
-
Coose a Solar System Object
: Check if source is solar system object. The drop down list contains known (to the control system) solar system objects. "Ephemeris" is a special choice, for which the "ephemeris" attribute should be completed.
-
Source Coordinates
: The coordinates of the source. This item includes
-
System
to specific the coordinates system
-
Sexagesimal display
for the format.
-
Parallax
: Parallax angle for the source.
-
RA
and
Dec
. Typically might be obtained from a catalogue.
-
Proper Motion RA
: Proper motion in right ascension; typical units are milliarcsec/yr. Might be obtained from catalogue.
-
Proper Motion Dec
: Proper motion in declination; typical units are milliarcsec/yr. Might be obtained from catalogue.
-
Source Radial Velocity
: The velocity of the source, including reference frame, optical or radio measurement and the redshift. It is also possible to enter a redshift. Might be picked up from catalogue.
In the source properties table that follows, flux and diameter, together with the frequency can be provided.
Finally:
-
Visible Magnitude
: Visible magnitude for the source (used in optical pointing). Is this definitely used/required? If so, can we specify it a little better?
-
Use Reference
: Use this position as a reference for off-source single dish observation.
Next:
Reference Position
Up:
Field Sources
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Field Sources
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The ALMA OT Team, 2011 May 20