9.2 Target Selection: Orion Nebula Cluster

Technically we should check the Reserved Observations Catalog (ROC) using Leopard (http://ssc.spitzer.caltech.edu/documents/leopard/) before planning any observations. Enter your target and choose ``search programs'' from the file menu. We find that the Trapezium region has pretty thoroughly been covered in IRAC, MIPS, and even IRS already. Had this been a real proposal, the next step should have been checking the Duplicate Observations Rule to see if the specific proposal idea we have in mind qualifies as a new observation- perhaps we would like to go deeper or over a larger area than previous observations, in which case our observation might not be considered a duplicate. However, for purposes of this example, we will plunge onward nevertheless with a shallow, large-area survey of the Trapezium. The Trapezium is very bright. Spot can help us find objects which are officially classified as ``bright''. More on this below.