Introduction

Let’s apply PACMAN to real observations of GJ 1214!

Fifteen transits of the planet GJ 1214 b were observed in HST Program GO 13021. In this example, we will reduce and analyze two of these visits to highlight PACMAN’s ability to fit multiple transits simultaneously.

The observation dates of these visits were (YYYY-MM-DD) 2013-03-13 and 2013-03-15.

When the visits are sorted by time, these visits have indices 5 and 6, using zero-based indexing.

Note

STScI uses visit numbers that are not sorted by time (see, for example, the visit information page for HST program 13021). PACMAN uses a temporally sorted indexing scheme. This program has 15 visits in total. Within PACMAN, the first visit is referred to with index 0, and the last visit has index 14.

Before we download the observations, we will create the directories needed for the PACMAN analysis: the data directory, the run directory, and the pacman_run_files directory. Next: Before Running.