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Source
Figure 5.1:
The
Source
panel in the Field Setup form of the Science Goal.
|
-
Source Name
: The source name. Clicking on
Resolve
will search for this source in a catalogue (either SIMBAD or NED) and fills in the source properties if found.
-
Resolve
: Resolve the source properties from the catalogue server.
-
Choose a Solar System Object
: Select if the source does not move with the stars. Default should be false. Check the box to select from
Name of object
.
-
Name of Object
: The options are Mercury, Venus, Moon, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Sun, Ganymede, Europa, Callisto, Io, Titan, Ceres, Pallas, Juno, Vesta, Ephemeris and Unclassified. These are mostly objects that are known to the telescope control system. For other objects, please select Ephemeris - this will bring up a dialogue that allows you to load an ephemeris file.
-
Source Coordinates
: The coordinates of the source are entered using several fields. The values may be filled in automatically if you have ``resolved'' your source.
-
System
: The coordinate system i.e. J2000. Changing this after values have been entered will not cause any conversion to take place!
-
Sexagesimal display
: Choose whether to view your coordinates in sexagesimal format or in degrees.
-
RA
: Source coordinate (Right Ascension).
-
DEC
: Source coordinate (Declination).
-
Parallax
: Parallax of the source. Typically used for optical pointing.
-
PM RA
: Proper motion in Right Ascension; typical units are milliarcsec/yr.
-
PM DEC
: Proper motion in declination; typical units are milliarcsec/yr.
-
Source Velocity
: The velocity of the source, including the units and reference frame. Alternatively, it is possible to enter the redshift and doppler shift type (radio, optical or relativistic) measurement. Entering the velocity parameters provides feedback on the redshift and vica versa.
-
Target Type
: The supported observing patterns. Multiple single point fields
or
1 rectangular field can be defined. If a Science Goal contains multiple sources, it is only possible to define single point fields.
It is possible to enter the details of multiple sources from an ASCIIdisk file using the
Load from File...
button at the bottom ofthe Field Setup form. We provide here a template for such a file thatcontains the format and the allowed fields (and theirunits). Parameters must be comma separated.
Source Name, RA(sexagesimal) , Dec(sexagesimal), PMRA (mas/yr), PMDec(mas/yr),Velocity (km/s), velocity reference frame, peak flux density (mJy), expected linewidth (kHz),expected polarization (%) -- This line signals end of the headerngc253, 00:47:33.129, -25:17:17.808, 0.0, 0.0, 244.0, lsrk, 200, 12.5, 15 ngc1068, 23:59:59.266, -00:02:02.774, 0.0, 0.0, 1133.0, hel, 1100.0, 50, 0
Next:
Expected Source Properties (for
Up:
Field Setup
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Field Setup
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The ALMA OT Team, 2011 May 20