Michelle Software for 04A

The Michelle software has been substantially reworked for Semester 04A. In particular there are changes to the acquisition sequence, which are reflected in the details of the Observing Tool library for Michelle. This document shows some Michelle-specific items not covered in the normal user guide to the OT. It assumes that you have read that generic guide. It also discusses a Michelle-specific acquisition method - peakup after imaging acquire.

At the summit, MSBs are now executed via the "Observing Queue", which is detailed in the execution manual.

Library

The OT library for Michelle is divided into several subsections, as shown in Figure 1.

Figure 1. The Michelle library, showing the Imaging, Spectroscopy, and Polarimetry subsections.

Imaging Acquisition for Spectroscopy

The acquisition sequence has been modified to enable UIST-style imaging acquisition. This is the function of the "Target Acquisition" Observe (aka Acquisition Eye) shown in both the standard star and target Observations within the MSB.

Figure 2. The Low-resolution spectroscopy MSB.

Note the use of :
(i) global Michelle component which applies to all Observations in the MSB.
(ii) global Target Information (overridden in the Standard Star Observation). Hence, Flats and Arcs are taken at the target position.

Figure 3 shows the target acquisition control panel which is displayed when the eye is clicked. Parameters can be defaulted to your setup by clicking the "reset to default" button.

Figure 3. The Acquisition eye parameter dialogue.

On execution, the Acquisition eye causes Michelle to switch to imaging mode and run for the specified observing time; then it switches back to spectroscopy and places the source on the slit. Optionally at this point it is possible to run a classical "peakup" to verify the precise positioning of the target.