0. Introduction 1. Preparation 2. MDP Startup 3. Mask Design 4. Save the images 5. Submit the results 6. Acknowledgment |
This document describes the usage of the MDP program.
Make your input file for the MDP program. This file contains information of your targets and their slit shape. Note, however, this file is not always required: You can design all slits interactively within the MDP program.
Obj1-X[PIX] Obj1-Y[PIX] Length1[PIX] Width1[PIX] Angle1[DEG] 1 B, comments...
Obj2-X[PIX] Obj2-Y[PIX] Length2[PIX] Width2[PIX] Angle2[DEG] 1 B, comments...
Obj3-X[PIX] Obj3-Y[PIX] Length3[PIX] Width3[PIX] Angle3[DEG] 1 B, comments...
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Star1-X[PIX] Star1-Y[PIX] 35(HoleSize)[PIX] 35(HoleSize)[PIX] 0 1 C, Alignment Hole
Star2-X[PIX] Star2-Y[PIX] 35(HoleSize)[PIX] 35(HoleSize)[PIX] 0 1 C, Alignment Hole
Star3-X[PIX] Star3-Y[PIX] 35(HoleSize)[PIX] 35(HoleSize)[PIX] 0 1 C, Alignment Hole
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Set the center coordinates of the mask. The center of the mosaicked image ( X, Y in pixels ) is set by default. Sometimes you may want to shift the mask FOV center position for optimal slit distributions within a mask, e.g., to avoid any spectra fall out of the detectors or on the insensitive gap between the chips and to maximize the number of slits. You can change the mask center position later if you wish.
If you change the FOV center position, then the RA, DEC coordinates for the MOS pointing in the observing nights also need to be modified accordingly. You need to submit a list of new RA, DEC coordinates together with mask design files (see below) at the end of the mask design.
Note: currently the FITS WCS coordinates of the mosaicked image do not work correctly. Please check the coordinates carefully.
Example of BAD alignment hole distribution. Distribution of stars are biased in the FOV. |
Example of GOOD alignment hole distribution Stars are distributing over entire FOV evenly. |
Case 1
Case 2
Case 1
Case 2
There are two types of the output data file.
First is the *.mdp file which can be used as an input of MDP program. Users are recommended to save this file frequently to avoid the unexpected loss of the information due to MDP crush, etc. You can re-start the MDP program with the *.mdp file saved during the previous MDP session.
Another is the *.sbr file which is used in the slit cutting machine. Save this file after finishing the design.
Select [ File ] - [ Save MDP ] from the pull-down menu. Input the file name (*.mdp), and push "OK" button.
Users are asked whether you want to keep the information on deleted slits or not in the saved file. Comments indicating "Deleted" will be added to the *.mdp file when you keep the information. This might be useful when checking the mask design later.
Sample of *.mdp file
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Note
While writing the *.sbr file, MDP checks the slit positions whether slits are out of the FOV or on the detector gap. When MDP finds any possibly wrong slits, warning messages are shown in the warning pop-up window. If you find such a message, check the slit design again to find out the cause of the warning. If you have intentionally put the slits near the FOV edge or the detector gap, there will be no problem, and just ignore the warning. If you find something wrong in the mask design, try to delete/modify the slits, or move the FOV center. Note that *.sbr will be created even when there are warning messages.