APT file support

The simulator possesses rudimentary support for simulating images from APT files. In order to simulate a scene, romanisim needs to know what’s in the scene, as specified by a catalog. It also needs to know where the telescope is pointed, the roll angle of the telescope, the date of the observation, and the bandpass. Finally, it needs to know what the MultiAccum table of the observation is—roughly, how long the exposure is and how the reads of the detector should be averaged into resultants.

Much of this information is available in an APT file. A rudimentary APT file reader can pull out the right ascension and declinations of observations, as well as the filters requested. However, support for roll angles is not yet included. APT files do not include the dates of observation, so this likewise is not included. APT files naturally do not contain catalogs of sources in the field, so some provision must be made for adding this information.

This module is not yet fully baked.

romanisim.apt Module

Very simple APT reader.

Converts an APT file into a list of (ra, dec, angle, filter, date, exposure time) needed for generating observations. This is adequate for reading in a few of the example Roman APTs but only supports a tiny fraction of what an APT file seems able to do.

Functions

read_apt(filename)

Read an APT file, returning a list of observations.

Classes

Observation(target, bandpass, exptime, date)	An observation of a target.
Target(name, number, coords)	A target for observation.

Class Inheritance Diagram