VMMPS: The VIMOS Mask Preparation Software
What is VMMPS?
The VIMOS Mask Preparation Software (VMMPS) is a SkyCat plugin to specify the VIMOS instrumental setup for Multi-Object Spectroscopy (MOS) during Phase 2 Proposal Preparation. VMMPS creates and manages the instrumental setup by means of files containing the Aperture Definition in Pixels (ADP) of the MOS slitlets. The ADP files need to be loaded into the P2PP tool to become part of an Observation Block (OB). For further information, please refer to the VMMPS Tutorial in Chapter 6 of the VIMOS User Manual.
Warning concerning the HR_blue grism: with the HR_blue grism please only place slits in the lower portion of the CCD (y<1400pix) in order to ensure that at least 10 arc lines fall on the detector. Neglecting to do so will result in a significant degradation of the wavelength calibration and in the failure of the automatic pipeline.
New for period 89: VMMPS has been updated to make optimal use of the field of view. The previous release (v3.24) remains valid for P89 but we recommend all users to upgrade for the preparation of their P89 MOS observation blocks.
The current public release of VMMPS is version 3.27 of the software (+ plug-in for Finding Charts).
This version of VMMPS is released as a tarball which also includes the appropriate SkyCat version (see below for download).
The latest version of the VIMOS Mask Preparation Software (VMMPS) is available for Scientific Linux 4.3 and has been used successfully on other Linux operating systems as well. Please note that it is currently not possible to run VMMPS on the MacOS X platform. If you do not have access to a PC or workstation running Linux, please contact the USD for assistance.
The VMMPS can be retrieved via anonymous FTP:
- VMMPS Retrieval and Installation Instructions for Version 3.27 (VMMPS for period 89 onwards)
For information about the use of VMMPS, please refer to the chapter 6 of the VIMOS User's Manual.
Please report all VMMPS problems and bugs to the ESO User Support Department (USD). Here we list some documented problems, and describe how to avoid them. Unfortunately due to lack of resources these problems could not be fixed in version 3.27 of VMMPS. Therefore the mask preparation using VMMPS has to be done with care. Once the ADP files are created they cannot be modified.
Problems with checksum in ADP files
- When attaching the ADP file, created with VMMPS, to an OB in P2PP I get the message that the file is corrupt. What does it mean?
- The ADP file created with VMMPS has empty CHECKSUM, which then creates error when I try to submit the OBs.
Additionally, recently a bug was identified in the step where VMMPS writes the final ADP file. If the button "Make 1 final ADP" is selected, the pop-up window is displayed asking whether to overwrite and save the resulting file .adp. The users should answer "yes" to this question in order to have the correct CHECKSUM written in the ADP file. However, at this point it is not possible to make any more modifications to the mask design. If the button "Make 1 final ADP file" is selected again and the file saved again the resulting .adp file will have incorrect CHECKSUM saved, even if no modifications are made.
ADP files and FITS headers
- The coordinates of MOS targets in the FITS headers make no sense. They are different from those in the VMMPS ADP files.
HIERARCH ESO INS SLIT7 OBJ RA
HIERARCH ESO INS SLIT7 OBJ DEC
get truncated just before the first ":" and therefore have incorrect values. This may create problems for some data reduction pipelines (e.g. VIPGI).
This page is specific to VIMOS