Below is a interactive mouse tool to aid in planning User Defined Science Windows (188.8.131.52 of the XMM-Newton Users' Handbook ) for the Optical Monitor (OM). This tool will enable you to produce your own set of Science Windows (encompassing image and fast mode) that follow all the rules set down in the technical note on Constraints on the OM Window Configuration and Definition of the OM Default Configurations and the XMM-Newton Users' Handbook . The tool also allows you to map out the dispersion direction of the optical and UV grisms. The interactive input required to complete these calculations are set out in four panels in the tool below,
On submission the tool outputs your specified science windows in Right Ascension and Declination coordinates, and also Detector coordinates. Both of these coordinates are suitable for input into the remote proposal handling tool. The Detector coordinates only apply to the specified position angle input into the tool.
Please note that this tool should be used to help you plan your OM observations. Although this tool does check the position and sizes of output windows, the final and definitive check is given by the Remote Proposal Submission System. The Vilspa SOC will not accept any claim based on this web tool.
This tool has been tested in the web browser Mozilla 1.2b and Mozilla 1.5, and runs with no initialisation problems or panel layout problems. This tool also runs in Windows XP, using Microsoft Internet Explorer Version 6.0.2600.0000. If you do notice any problems then please contact us.
IMPORTANT - please read the User Instructions below, before using this tool.
You have a choice between three background options for the sky field of view (or sky FOV),
The LOAD button loads the chosen background into the sky FOV in panel 3.
If you want to be able to load your own images into this tool then please go to the section titled Using Your Own Images, after reading how to use the tool. You can use this web version of the tool to become accustomed with the tool.
This panel sets up the user defined science windows and allows you to draw, reset and check these science windows.
Before drawing any window you need to set the following:-
NOTE: If the total number of science windows (image + fast) exceeds 5, then a warning message will appear on the screen and you should adjust the number of science windows chosen accordingly.
You can use the Load Coordinates button to load the Right Ascension, Declination and Position Angle coordinates entered in this panel.
This panel also contains the following buttons which enable you to draw your fast and image mode science windows onto the sky FOV (in panel 3);
This panel represents the sky FOV, and allows you to draw science windows using the mouse.
A red colored box is automatically drawn on the sky FOV, and this represent the Optical Monitor field of view (or OM FOV), anything outside this red box will not be observable by the Optical Monitor. The tool has been set up in this way to enable you to see if any bright stars outside the OM FOV will contaminate your data. For this reason you can apply an optical or ultraviolet grism spectral dispersion direction to any star outside the OM FOV.
A red cross hair is automatically drawn on the OM FOV; this cross hair represent the centre of the OM FOV. A cream North-East coordinate direction is also automatically drawn, and rotates with position angle, along with the image.
To draw a fast mode science window, click either mouse button to produce a small orange box that indicates the position in which you want the fast mode window to be centered. Once you are satisfied with the position, click the Add Fast Window in the Drawing Science Windows panel (panel 2), and further adjust the Right Ascension and Declination using the Java Applet Window to centre your fast mode window. Once the window has been saved it becomes light green. If your fast mode window falls outside the OM FOV, you will be warned and the tool will be automatically reset.
To draw an image mode science window, first choose the resolution of the image window by using the buttons in panel 2, then hold down either mouse button and drag the mouse to form an orange rectangle, releasing the button to drop the window. If the rectangle you have drawn is to large for an image mode science window, a warning will appear on the screen. You can redraw the orange rectangle as many times as you want. Once you are satisfied with the window, click the Add Image Window in the Drawing Science Windows panel (panel 2), and the image mode window will be saved. If your image mode window falls outside the OM FOV, you will be warned.
If you try to add more windows then you have specified, a warning message will appear on the screen indicating that there are no more windows to add.
To draw the dispersion direction for a star's spectrum, click either mouse button on the centre of the star in question, then use the Add V-G or Add UV-G buttons in the Drawing Science Windows panel (panel 2), respectively (you may click on any star within the sky FOV). A yellow (Visible grism) or violet (UV grism) line indicating the dispersion direction will then be drawn in the sky FOV. By varying the Position Angle of the telescope you can investigate possible problems of bright star interference with your target object spectrum, and also the effects of non-square windows. You may add up to 20 lines for each grism.
Once you have saved all of your science windows, you can use the Check Windows button in the Drawing Science Windows panel (panel 2), to check your windows lie within the specifications set down in the technical note on Constraints on the OM Window Configuration and Definition of the OM Default Configurations. After clicking the Check Windows button, you will be given the option to either,
You can replace a saved image window (i.e. green image window) by clicking the image resolution required using the buttons in panel 2, and then drawing the replacement window in the OM FOV. Once you are happy with your replacement window, press the Replace Window button on panel 2. After pressing this button a Java Applet Window will appear giving you the choice of which window you wish to replace. If you request an image window that does not exist you will receive an error message. Please note,
After you have,
On submission a new Java window will be opened containing information about your input values and your user defined science windows. X0 and Y0 for each window are given in,
There are a set of constraints for User defined science windows set down in the XMM-Newton Users' Handbook ; these constraints are summarised below. This tool will either warn you of any violations, or slightly adjust window size to comply with the constraints.
For Right Ascension, Declination and Position angle values to be entred into the tool, you must either,
If you find that the tool has crashed then reload the web page to restart the tool.
We suggest that you place any fast mode windows on the OM FOV first, and once you are happy with these positions, then add your image mode windows. We also suggest that any objects that you wish to observe using fast mode windows, be positioned toward the centre of the OM FOV, because if your fast mode window falls on the edge or outside the OM FOV, the tool will be automatically reset.
NOTE: Please pay attention to any warnings. To highlight a problem, the tool will beep and a dialog box will appear explaining the violation. After clicking the OK button, you should adjust your input values accordingly.
Return to tool
The above tool gives you a choice of only three backgrounds. If you require a specific star field to be loaded into this tool then you will need to do a number of things,
This tool allows you to load JPEG and FITS files.
To download the Application Clicking Here . The file size is 190KB, and the file name is omTool_rv7.jar.
Once downloaded go to the directory in which you saved the application, and type the following command into the command line to run the application,
java -jar omTool_rv7.jar
if you have any problems in running this application then please contact us.
You need to put you image into the same directory as the downloadable Application. The downloadable tool can load JPEG and FITS formated images, using the Load JPEG Image or Load FITS Image button in panel 1 respectively. You can also load a black or grey background for the OM FOV using the Load Black Background or Load Grey Background in panel 1 respectively.
Your JPEG images must cover 25x25 arcmins of sky, and should be 600x600 pixels in size. This is important, if the size of the image is not correct then the OM FOV set up in this tool will not give you a true representation of what you see in the OM FOV.
Use the Load JPEG Image button in panel 1 to load the image into the application .
Your FITS images should follow the basic FITS standard, must cover 25x25 arcmins of sky, and should be 600x600 pixels in size. As with JPEG images, if the size of the image is not correct then the OM FOV set up in this tool will not give you a true representation of what you see in the OM FOV.
Here are the steps you need to take to produce a suitable FITS image that can be loaded into the downloadable Application.
The image can then be loaded into the application using the Load FITS Image button in panel 1.