Changes between Version 10 and Version 11 of HowTo


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Timestamp:
Oct 12, 2021, 9:38:00 PM (12 months ago)
Author:
holtz
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  • HowTo

    v10 v11  
    2828You can connect to TMO's computer via VNC Viewer - tmo.nmsu.edu - Jon and Zach have have the password for this connection.
    2929
    30 Some times the connection can be slow and there is not immediate feedback when you press a button. Only press a button once.
     30Sometimes the connection can be slow and there is not immediate feedback when you press a button. Only press a button once.
    3131
    3232'''Please Note''' - VNC uses port 5900 to connect to a computer. If too many people are connected at once, this can cause the connection to run slowly. Make sure you disconnect when done for the night. And if someone else is using TMO please limit the number of connections to what is required. Zach will occasionally go through and kick lingering connections on port 5900 (during the day).
     33
    3334== Using the webcams ==
    3435
    3536There are two webcams in the dome, one looking at most of the dome (it can be steered), and one looking at the telescope dials (note that only HA and DEC will be correct, not RA which depends on a clock!). They are accessed using the Internet Explorer (only!) browser by going to the addresses tmocam.nmsu.edu (dome/telescope) and tmocam-wireless.nmsu.edu (dials) using the browser on the TMO desktop (which is actually Microsoft Edge but running in Explorer emulate mode for these addresses). The user is admin.
    3637
    37 Use these generously! They have built-in LED lights that you can turn on. These shine at ~8000 A, so can even be on while you are taking exposures, unless you are working in the I band.
     38Use these generously! They have built-in LED lights that you can turn on. These shine at ~8000 A, so can even be on while you are taking exposures, unless you are working in the I or z band.
    3839
    3940If something does not look right in the webcams, stop! In particular, if the telescope does not appear to be pointing where the coordinates in the software think it is, you should stop, to avoid running the telescope into the limits.
     
    4142Note that the dials tell where the telescope really is, not the software!
    4243
    43 == Start Up from an Empty Desktop ==
     44== Start Up ==
    4445
    4546Usually, software is left running. The software consists of:
     
    6768== Slew to an Object ==
    6869
    69 Slewing can be accomplished through the ACP program, which provides a deep sky catalog and various bright stars, or through the Scitech telescope controller. The "Nudge" window in ACP allows you to offset the telescope in any direction.
     70Slewing can be accomplished through the ACP program, which provides a deep sky catalog and various bright stars, or through the SciTech telescope controller. The "Nudge" window in ACP allows you to offset the telescope in any direction.
    7071
    7172To go to an object - in the bottom left of the ACP box, click '''Slew or Sync (catalog)'''. This will bring up an option to allow you to slew the scope to a given object. There are four options:
     
    8485you wish to try autoguiding, use the Guide tab, click the Track button, and start exposing. If the software cannot find a guide star in the guide camera, it may try to guide on noise and may make the image much worse than without guiding.
    8586
     87== Image display in MaximDL ==
     88
     89
     90The science camera has a lot of pixels, so if you display it at 100% it will be far larger than the image window and you will need to use the scroll bars to see everything. To see the whole frame at once, use 12.5% view.
     91
     92The Screen Stretch window is useful for adjusting the brightness and contrast.
     93
     94You should be able to center an object in the field of view using the right mouse button when the cursor is on the object you wish to center, the find Point Telescope Here near the bottom of the menu. Sometimes it seems that this goes the opposite direction in one axis, so you may need to figure out where you need to click!
     95
     96
    8697== Focusing ==
    8798
    88 Manual focussing using Jog window in FocusMax... Windowing and continuous imaging with MaximDL
     99In general, the ACP !AutoFocus script works well. You will need to select a filter, this time by name, but it seems that it will focus in SR no matter what you input!
    89100
    90 Automatic focusing with the !AutoFocus script in ACP.
     101To focus manually, point the telescope at a moderately bright star (use the !FindBrightStar script works well). Take an image with MaxIm DL. Use the cursor to drag a box across the star so that you can display images at 100% but just see the region around the star. Adjust the exposure time so that the star is well exposed but not saturated. Adjust the greyscale so that you can see the intensity structure near the star center. Start taking continuous exposures by clicking the Continuous button (instead of Single), then hit Start.
     102
     103In !FocusMax, open the Jog window. You can use the In and Out buttons to move by the amount specified in  the box. If you are near focus, using a step size of 25-50 should be good. Do a focus run from out of focus on one side to out of focus on the other and choose the best focus value.
     104
    91105
    92106== Scripts ==
     
    99113- !CenterScope.vbs
    100114
    101 == Image display in MaximDL ==
     115== Closing Up for the Night ==
    102116
    103 Centering with Point Telescope here (right mouse)...
    104 
    105 Adjusting brightness and contrast....
    106 
    107 == Closing Up for the Night ==
    108117Make sure that both the dome and the telescope are parked. In the Dome Control window you can simply click "park" and it will tell the dome to go its resting position. In the telescope control box, click "park" and it will do the same for the telescope.
    109118