This article presents an example for creating a solar system observation in the JWST Astronomer's Proposal Tool (APT).
Main article: JWST Astronomers Proposal Tool Overview
We walk through an example for creating new solar system observations in the JWST Astronomer's Proposal Tool (APT). This is a very basic example; the article Solar System Special Requirements describes in greater detail the options for constraining moving target observations.
To learn how to download APT and start a JWST proposal, see JWST Moving Targets in APT. Before this tutorial you may want to read Tutorial on Creating Solar System Targets in APT and after, Tutorial on Visualizing Dithers of a Solar System Observation in APT. If you have questions please contact the help desk.
Getting started creating a Solar System observation
You must first create targets before proceeding to this step.
The workflow for this step is
To create observations for your targets, click on the Observations folder and then New Observation Folder. An empty Observation Folder will be created, containing an empty Observation 1. Inside Observation 1 will be a blank form where you can select the target, instrument, template, etc.
The article APT Observations describes APT observations more generally and APT Observation Templates describes the available instrument templates. Below we give an example for setting up a NIRCam Imaging observation; other modes, of course, have their own unique parameters.
Example: NIRCam imaging
To create a NIRCam imaging observation, select NIRCAM from the Instrument drop-down, NIRCam Imaging from the Template drop-down, and one of the previously defined targets from the Target drop-down. After you have selected the template, a new form will appear at the bottom, where you can define the template's parameters such as the subarray, dither pattern, and filters. Notice how the estimated time in the Duration box changes as you tweak the parameters.
In the other tabs on the template form you can, for example, modify observation constraints such as timing and position angle under These can differ between observing templates; more general information can be found in .APT Special Requirements.
Let's add a solar phase constraint. In the Solar System Target Windows tab click Add Observing Window.
Select New Solar Phase Observing Window from the drop-down. You will get a pop-up menu as shown below. Under Object you can select from a list of any of your defined targets or solar system Standard Target, and likewise from the Observer drop-down menu.
Solar System Target Windows
A full list of the available Solar System Target Windows, with descriptions, can be found here. A few notes about specific Solar System Target Windows:
The user should be aware that drop down menus for choosing solar system objects, available in a few of the Solar System Target Windows, will place targets defined by the user in the APT file first, followed by standard targets, satellites of standard targets, and JWST at the bottom. (There is a second instance of JWST between the standard targets and their satellites, and either can be used.)
Download the Astronomer's Proposal Tool