Handbook Reference Guide

How do I Calculate the FOC Exposure Times?

Chapter 7 is devoted entirely to calculating the exposure time by hand for any given FOC exposure using information given in the Handbook. In contrast, "FOCSIM" on page 106 describes how FOCSIM has been designed to automatically use that same information to calculate exposure times and to simulate FOC images. For point source exposure times calculations, FOCSIM can actually be run by anyone under the FOC WWW pages ("WWW Form for FOCSIM" on page 107) using a very simple graphical form. Objective prism observations can now be simulated using the STSDAS package FOCPRISM as described in "Objective Prism Image Simulation" on page 109. This combination of options should allow every user to easily model their FOC exposure.

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