TV-Guider User´s Manual

General Introduction
1. Basics
2. Monitors and Windows
3. Camera-Configuration at
How to login, start, finish ...
Usage of the cameras
1. Adjusting the cameras
2. Shutter and Overload
How to grab images
Working with images
The Autoguider
Focussing the camera
Some more commands you must know
Some more remarks you should read (e.g. trouble shooting)
Scales and Sizes
Appendix

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General Introduction

Basics

The TV-Guiding-System at each telescope consists in principal of two components:

the TV-Cameras in their housings at the telescope foci and
the control computer with two monitors to operate these cameras.

The Cameras: Proxitronic Cameras (HL-A/MPIA-Version), consisting of
1. MCP-proxifier as first stage, (S-25-Cathode)
2. an inverting image intensifier as second stage for size-adaption to the CCD and
3. a PULNIX TM860 (CCIR) CCD-Camera with 774 x 574 pixel of 11/11.5 micron
The MCP-Gain and the Video-Gain are controlled by an external voltage.
The Control Computer is a HP-486/25 MHz EISA PC, running under a standard System-V-UNIX Operating System with X11 Release 5 and OSF Motif as Graphical User Interface (GUI).
Hence capitalization and use of small letters is strictly distinguished.

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Monitors and Windows

The TV-Guider-System uses two monitors:

The Video Display Monitor shows the TV-camera images and related informations.

Video Display in Slit-view mode with TWIN spectrograph.
Click on the image for a more detailed view.
The Control Monitor is used for operating the TV-Guider. For this, two basic windows are opened, the
- TV-Guider Control Panel (upper window) for usage with the mouse
  TV-Guider Control Panel for Spectroscopy at 3.5m telescope
  Click on the image for a more detailed view.
- TV-Guider Command Shell (lower window), where you enter via keyboard special commands and parameter.
  
  TV-Guider Command Shell at startup of 3.5m tvg program
Note: The Cursor has to be moved to the window you want to work in, - especially for using the Function-keys and the ESC-key, the Cursor must be in the Command Shell Window.
More windows are opened on request, e.g. for Aperture, Filter list, etc.

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Camera Configurations

The Configuration at the 3.5m telescope:

One of the following 5 configurations has to be selected at startup of the TV-Guider program:

Cassegrain Imaging (Mode: Acquisition, Guiding)
Cassegrain Spectroscopy (Mode: Acquisition, Guiding, Slit-view)
Prime-focus/K2 (Mode: Acquisition, Guiding)
Prime-focus/K3 (Mode: Guiding)
Cassegrain Adaptive Optics

Cassegrain imaging:

Cassegrain Imaging is used with all imaging-like instrumentation (e.g. MAGIC, etc.) for Acquisition (on-axis field) and Guiding (Off-axis field).
Camera-Options: 3 filter and focus.

Cassegrain spectroscopy:

For Cas Spectroscopy, (TWIN-spectrograph, MOSCA, Spaltspinne, FOCES, etc.) a slit-view is supplied in addition to the Cass Imaging mode.
Camera-Options: 3 filter and focus.

Prime-focus/K2:

In the Prime-focus/K2 one single camera serves

for acquisition when the axis B is selected at the telescope,
for guiding, when the telescope is moved to axis A.

Camera-Options: 2 filter, aperture, and focus.

Prime-focus/K3:

In the Prime-focus/K3 a single camera serves only for guiding.
Camera-Options: 3 filter and focus.

Cass Adaptive Optics (ALFA):

This camera is part of the ALFA instrumentation. It's usage is described in the ALFA manual.
Camera-Options: 3 filter and focus.

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The Configurations at the 2.2m telescope:

At the 2.2 one of three configurations has to be chosen at start of the program:

Cas Imaging with camera modes Acquisition and Off-axis Guiding
Cas Spectroscopy with camera modes Acquisition, Off-axis Guiding and Slit-view
Coude with camera mode Slit-view.

In configuration Imaging you can use the TV-Guider for Acquisition (On-axis camera) and for Guiding (Off-axis camera). To enhance the accessible field for finding a guide star the Off-axis camera can be moved in one direction (slider Guide field). If you are working with the Cassegrain spectrograph (Configuration Spectroscopy) the On-axis camera serves for Slit-view, too. The Slit-view mode can be used both for Acquisition and Guiding. At the Coude focus only one camera is installed, looking on the slit.
Camera-Options
- Cas On-axis Camera: 3 filter, aperture and focus
- Cas Off-axis Camera: focus and transversal movement (slider Guide field)
- Coude Camera: 3 filter and aperture.

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The Configuration at the 1.23m telescope:

The TV-Guider of the 1.23m telescope (Cassegrain focus) is part of the Instrumentenansatz, which normally is used for CCD direct imaging. Thus the TV-Guider can only be used if that Instrumentenansatz is installed at the telescope. The TV-Guider has only one configuration: it uses a single movable camera for both On-axis (acquisition) and off-axis (guiding) operations, --- thus the camera position (slider Position) has to be set accordingly. The borders of the guiding regions left and right of the on-axis beam depend on the size of the used CCD-detector and will be given to you by the Calar Alto staff. Clicking on TV-Mode/Acquisition or TV-Mode/Guiding will move the camera to the on-axis position (0) or into the beginning of the right guiding region, respectively.
Camera-Options: 3 filter, aperture, and focus.
Note: The camera-focus is automatically adjusted for the difference between on-axis and off-axis positions if you once pressed the button Focus ok!. Yet be sure that you focussed the TV-Camera properly at the present position before initialization of the focus adjustment. Any movement of the focus slider (or entering set -f in the Command shell) stops the automatic adjustment of the focus difference!

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Switching between camera modes

You switch between the different camera-modes of each configuration by a mouse-click on the equivalent command in the menue TV-Mode of the TV-Guider Control Panel. Changing mode/camera needs some activities, so you have to wait for completion of that action. The "Busy"-state is symbolized by a change of the Cursor shape: when "busy", the Cursor looks like a small watch.

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How to login, start, finish ...

login: Login as user tvg. The actual password is given to you by the Calar Alto staff.
start: Enter tvg at the prompt.
setup: On startup the program will ask you for the configuration and some other necessary parameters.
help: Type help or ? to get a short command overview on the Control-Monitor.
finish: Enter quit in the Command shell to finish the program. Cameras are switched off automatically. If you want to logout completely you have to open the pull-down menue of File in the upper menue bar and select Exit
Attention: Don't forget to use quit at the end of observation in order to switch off the cameras.
Attention: Never switch off the PC without successful shutdown procedure !

Usage of the TV-cameras

Adjusting the camera(s)

All tasks related to selecting or adjusting a camera are performed within the TV-Guider Control Panel. Up to four sliders help you to adjust the parameters of the active camera, i.e. gains (MCP-Gain, Video-Gain, Offset) and, - besides Coude, also focus. If filters are supported, the diamond buttons allow you to select one of the available filters. Clicking with the mouse on menue Info/Filterlist will show you more informations about the filters installed. The iris-diaphragm is closed, opened or stopped by clicking on the equivalent commands in the window that is opened by menue Misc/Aperture
The sliders generally are scaled to 100. Moving the slider is done by mouse, i.e. by dragging it to the goal position or by clicking with the left mouse button, which causes a stepwise moving of the slider. For indication of Busy-state the Cursor shape changes to a small clock. The momentarily disabled functions always are shown slightly shadowed.

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Shutter and Overload

The shutters of the cameras normally open and close automatically when using the image acquisition commands grab, quick and intup. If too much light is seen by the camera, it will go in Overload on followed by a beep and a warning message on the control monitor. The shutter is closed automatically and the Overload status is reset when clicking on Dismiss in the warning window.
Before starting a new image acquisition you first have to prepare for conditions to prevent the camera from going in overload again, e.g. by using a density filter or the iris-diaphragm, or by moving the camera or the telescope, respectively.

Attention: Too much light can cause damage to the camera.
So, be careful where the active camera looks at when you open the shutter by one of the image acquisition commands. The input plane of the camera, which is the input cathode of the intensifier, is the critical element that can be damaged. A very low MCP- and Video-Gain will pretend a sufficient low signal, although the incoming light itself may be already too bright for the cathode. Thus a medium or high MCP- and Video Gain (> 50%) makes sure that the overload mechanism functions properly. When the camera does not go in overload with these gain values there is no problem to reduce the gains further. So, as a good precaution, use grab or intup and start with a high MCP- and Video-Gain (e.g. 70)!

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Grabbing of images

grab grabs images in CCIR TV-mode ( 50 Hz interlaced).
quick ti starts a loop, i.e.: integrates ti seconds and then displays the integrated frame continuously (ti > 0.04 seconds!). Just typing quick or clicking on the quick button takes the last value of ti. At start of the program ti is always set to 1 [sec]. The actual value of ti is shown in menue Info/Parameter. It also can be changed by the command set ti value.
intup continuously integrates up, displaying every second the actual status. Pressing the Esc-key stops intup. When the count limit of 65536 is reached in distinct pixels (e.g. bright stars) these pixels keep this value, whereas integration continues in the other pixels with lower count values, i.e. sky background and fainter objects.
Esc-key or clicking on the Stop-Button generally stops all frame grabbing commands.

Use intup or grab for an overview.
Use grab or quick when telescope movement has to be watched.

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Working with the images

Video Display-Cursor:
Via the button Video Display in the TV-Guider-Control Panel you have access to the Video Display Cursor on the Video-Monitor. Then a cursor appears on the Video-Screen thus symbolizing that you are now in Video Display CURSOR MODE. Look at the Video-Screen and move the mouse which controls now the Cursor on the Video-Screen. Click the right mouse button to return to the Control Monitor. If there are problems to leave the Video-Display see Troubleshooting .

Note: CURSOR MODE on the Video-Screen partly is available with active grab. It is not available during active quick or intup image acquisition.

In CURSOR MODE the following commands are supported:

q: Type q or click the right mouse button to leave the Video-Display and return to the TV-Control Panel on the Control Monitor.
c: Type c or click the left mouse button to find the center of moment at/near the current cursor position. The cursor then is moved onto this center, yet the telescope itself is not moved !
Note: For the Center-procedure all image-acquisition must have been stopped!
z: zoom out area around cursor by a factor of 4.
o: show actual orientation (North/East) of image.
h or v: set and display a horizontal or vertical line at current pointer position on Video-Screen.
k: set and display a marker at current cursor position.
l: display cuts along the horizontal and vertical direction (with cursor position as center).
0 .. 4: initializes a drawing of a circle of radius 5,10,15,20, or 25 pixels at the cursor position.
Cursor up, Cursor down: change upper limits of image LUT continuously.
Cursor left, Cursor right: change lower limits of image LUT continuously.
Telescope Move: Click with the middle Mouse Button. First click defines position 1 (one beep). With the second click at position 2 (two beeps) the telescope moves from position 1 to position 2.
Attention: When grab is active, telescope movement can be done. Yet quick and intup have to be stopped before you can move the telescope by mouse click.

Overlay: If you want the markers and lines to be kept through the following image acquisition actions you must disable the Autoclear overlay function in menue Options/General The overlay of distinct windows can be cleared by clear n, (n=1, .. 6), where n stands for:
1: the frame window, 2: the zoom window, 3: the Info Area below the frame window,
4: the x-Profile window, 5: the y-Profile window, and 6: the light-curve window.

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The Autoguider

guide [t_c]
Entering guide t_c in the command shell or clicking on the Guide-Button starts an autoguider session using the last centered position (by c, or af, or a previously stopped guide sequence) as reference position. Thus, from the very beginning of the autoguider session the guide star is held on that (previously centered) reference position. Correction of the telescope, - if necessary, - is done after each integration period of t_c [seconds]. As the necessary telescope actions need some time for completion, the real cycle time of the guider always exceeds the entered value t_c, depending mainly on telescope reaction time. You can check the actual setting of t_c in menue Info/Parameter. Pressing the Esc-key or clicking on the Stop-Button stops the Autoguider --- as do unexpected actions like moving the telescope by hand, etc.
Find&Guide
When clicking on this button the Autoguider takes the brightest object in the actual video-display frame as guiding object. I.e. an autofind-procedure is performed and a guide session is started using the found object as guide-star. Thus you do not need to select, i.e. to center, a guide star by yourself. However, this guide object must not be always the best one in the frame. As it may be too bright or too extended the astronomer is responsible for checking this selection and, if necessary, stop the autoguider session and center a suitable guide star by himself.
Normal procedure to start the auto-guider:
1. Preparations:
  Select the camera-mode Guiding (or Slit-view in case of spectroscopy).
  At the 1.23m telescope move the TV-Camera into one of the guiding regions left or right.
2. Start intup
  If there does not show up a suitable guide star you may move the camera (Slider Guide field at 2.2m and slider Position at 1.23m telescope, respectively) until you find one. In this case, - when moving through a field, quick or grab is more appropriate.
3. Stop intup or quick respectively. In any case, it should be an integrated image !
4. If the brightest object on the frame seems to be a good guide star, click on button Find&Guide; if not switch to the Video Display, center a guide star with a Mouse click left (or typing c), return to the TV-Control Panel (Mouse click right), and start guide.
Adjustments: When the Seeing is very bad you should enlarge the guide window (enter set gw value), which at begin is set to 45 pixel (60 pixel at f:45 at 3.5m telescope, respectively).
Guiding by hand: For guiding manually the following procedure is proposed: Center your object as with the Autoguider, disable telescope control (menue Options/General) and start the guide-session. Thus you will have any information as with the Autoguider, yet without automatic telescope movement.

Lightcurve: Always the last 200 Intensity values of a guide session are drawn using the minimum and the maximum as lower and upper limits. However, to ensure a reasonable resolution, the lower limit is kept at the value of the first 10 data points if the intensity is going low caused by e.g. vignetting effects like dome-moving, etc. In addition, the drawing of the light-curve can be restarted any time by entering a 0 during the guide session.

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Focussing the camera

Imaging and Guide-mode:
Once you have focussed the telescope for your instrument, click on button Focus. Then the TV-Guider gets the telescope focus and moves the TV-camera accordingly. When changing the telescope focus don't forget to adjust the TV-camera focus. If no connection to the telescope is available, you can enter the telescope focus manually by typing set fp value, where value is the telescope focus in micron (an integer value, as you can read it from the display of the 3.5m telescope). Then a click on the Focus-button leads to the equivalent camera movement. Note, that if a valid telescope focus is returned from the telescope computer the manually entered value is overwritten !
Slit-view-mode:
In slit-view mode you have to focus the TV-camera manually to get a sharp image of the slit. This is best done with the dome closed and some dome-light on. With this camera focus fixed, the telescope is focussed by using a star on the reflecting slit-jaws of the spectrograph.

Note: At the 1.23m telescope you still have to focus manually. Yet the camera-focus is automatically adjusted for the difference between on-axis and off-axis positions if you once pressed the button Focus ok!. Yet be sure that you focussed the TV-Camera properly at the present position before initialization of the off-axis focus adjustment. Any movement of the focus slider (or entering set -f in the Command shell) stops the automatic adjustment of the focus difference!

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Some more commands and Options

af: (autofind) finds the position of the brightest object in the actual frame and performs a center (c) command. As this may well be an extended object, it is not automatically the best guiding star.
flip [x,y,b]: displayed image over x,y or b(oth) axis when no grabbing is active.
During active image acquisition with quick and intup constant flipping can be set by flip = 1 for x, flip = 2 for y, and flip = 0 for no flip (also reset).
Attention: Only the display is flipped, all memory readings like o, z and, - above all, c and all Autoguider operations refer to the non-flipped image. Therefore use this command only for a view on the image and do not forget to reset flipping before starting auto-guider operation, etc. !
cuts [min,max]: sets display cuts on actual frame on Video-Screen (0-255). Usage for faint objects. Typing just cuts resets cuts-values to 0,255.
When in Video-Display Mode cuts can be changed continuously with the cursor keys up and down for the upper limit and left and right for the lower limit. Autoscaling is set again by clicking on the equivalent button in menue Options/General
set gw [ 9...99]: sets a new guide-window width [pixels]. (Default: 45). See also menue Info/Parameter
Attention: Enlargement may be necessary for very bad seeing conditions.
Autoclear: Menue Options|General|Autoclear Overlay allows to enable or disable autoclearing of the overlay on the Video-Screen. (Default: overlay is cleared automatically with each image acquisition process). When autoclear is disabled, you can clear the whole overlay by clear o or single overlay windows by clear 1 ... 6. Use disabled autoclear if you want to keep horizontal and vertical lines, circles, or markers, set by the commands h, v, 0, ... 4, or k through different acquisition processes.
Telescope control: Menue Options|General|Telescope control enables or disables the connection to the telescope.
Note: In Coude-mode (no Autoguider present at the moment) and for guiding with the Handguider you must disable the telescope control.
save [filename.fits/]: saves actual data as FITS-format file on disk. Files are stored in the actual working directory users/tvg/observerx, where x stands for 1,2,3.
load [filename.fits]: loads previously saved FITS-format file from disk to Video-Screen.
Copying files to DAT: The saved fits-files and the LOG-files (see below) can be copied to a DAT-tape by the following procedure: Leave the tvg-program and enter a DAT-tape into the DAT-drive of one of the work-stations (e.g. rst4 at CA2). Change to the equivalent directory of your files and enter:
```
  gtar cf server:/dev/rstX *.fits   
```
(server = CA2, and rstX = rst4, e.g.)
The following prompts for username and password must be answered (e.g. observer3 and the password for observer3 at CA2).
LOG-File: Every day a LOG-File with all important informations about the actual guiding sessions is created in the directory /users/tvg/LOG. The file name refers to the actual date, e.g.: tvGuiderLog.18-May-1995. See example and explanations in the appendix .
set +/- f: Enables/disables automatic adjusting of the TV-Camera focus when moving the camera out of the telescope axis. 1.23m telescope only!
Move&Guide: With the command mg du, dv you start the following pocedure:
1. Move telescope by the given amount du and dv (in [arcsec]).
2. Compute the new position of the last centered star on the TV-camera image
3. Start guiding on that star at it's new position.
Seeing: Entering see [len],[n],[x],[y] starts a procedure which measures the actual contribution to seeing caused by the irregular movement of the stars. For this reason a star on the displayed frame must have been centered. The parameters are:
1. len: Size of window around the star in Pixel (Default = actual guide window width).
2. n: Number of CCIR-frames to be integrated for each frame. n = 1 gives a framerate of 12 Hz, (n = 2 gives 8 Hz, n = 3 gives 6 Hz, and so on (Default = 2).
3. x, y: Center-coordinates of window. (Default: x, y of last centered object).
The data are stored in a file in directory /users/tvg/LOG.
Overlay: If you need the same overlay drawings (circles, lines, rectangles) very often, you can use an ascii-file with the necessary data. This file must be of the format of the default file tvg.overlay in the directory /users/tvg/observerX/ (X=1/2/3, respectivly). The command load_ov file loads the file and ov causes the program to draw the desired features. Don't forget to disable the function Autoclear overlay in menue Options/General !
compLOG: Typing $compLOG (or outside of TV-Guider program: compLOG) gives you a statistical overview on the guider-session LOG-files of a selected date.

Statistics: With the command stat [x, y, len] you will perform some statistics on the data in the defined window (center: x, y and window-size len). The default parameters are: last centered x, y and actual guide window width.

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Some more remarks you should read

Troubleshooting: In case of getting stuck in the TV-program (e.g. if there is no way out of the Video-Display for the mouse) you may kill the TVG-program by the following procedure:
1. Press in one the keys < Ctrl > < Alt > < F1 >
2. Login as tvg
3. Enter: ps -ef | grep scosession
4. Read the given job number and enter kill -9 jobnr
5. Type exit, switch to < Ctrl > < Alt > < F2 > again and restart tvg.
Reboot Procedure: In emergency case the reboot is done by the following steps:
1. Press in one the keys < Ctrl > < Alt > < F1 >
2. Login as tvg
3. Enter: /tcb/bin/asroot shutdown -g0 -y -i6
Shutdown of PC: In order to switch off the computer you first have to do a shutdown.
1. Press in one the keys < Ctrl > < Alt > < F1 >
2. Login as tvg
3. Enter: /tcb/bin/asroot shutdown -g0 -y
4. Wait until the message
  ** Safe to Power off -- or -- Press Any Key to Reboot **
  appears on the screen.
5. Now you can switch off the power of the PC
In case of power failure the electronic and the PC need some time to recover. If the communication with the TV-electronics fails after startup, the following action may help: switch off for some seconds the TV-electronics at the telescope and wait (some minutes !) for its new initialization.
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At the end of the TVG-Program: You can switch off the monitors to enhance their life time, but, please, don't switch off the PC.
Whereas the Control Monitor is supplied with a screen saver, the Video-Monitor should be cleared (Command clear) when there will be no TV-Guider activities for several hours.
Switching on/off cameras: The cameras are switched on/off automatically, when you start/quit the TV-Guider program. Therefore:
Don't forget to finish the Guider program with quit at the end of your observation.
Otherwise the cameras would keep running all the day long. A camera also can be switched on/off explicitly by using the corresponding commands in menue Setup
Autoguider at 1.23m telescope: For proper use of the Autoguider, check for the stepsize of the telescope Handguider at the Telescope Computer. Must be set to 0.1 [arcsec].
FWHM: The given FWHM-value for the guiding star profile and in the seeing computations does not represent the actual seeing value. As each light signal is widened by the image intensifier of the TV-camera to a fwhm of about 75 [micron], the seeing width is only merged to this intrinsically widening of the TV-camera. Depending on the telescope focus these intensifier induced fwhm may be already equivalent to more than 1 [arcsec].

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Scales, Field sizes and Mag-Limits for a 10 sec Integration

The Cameras have 764 x 574 Pixel and their scales at the different telescope foci are as following:

Telescope focus Pixel per arcsec Field [arcmin x arcmin] Limit [mag]

1.23m Cas 2.5 5 x 3.8 18.5

2.2m Cas On-axis and Off-axis 4.5 2.8 x 2.1 18.5

2.2m Cas Slit-view, Optic I 2.7 4.5 x 3.4 19.5

2.2m Cas Slit-view, Optic II 12.2 1.0 x 0.8

2.2m Coude

3.5m Prime K2 2.8 4.5 x 3.4

3.5m Prime K3 3.5 3.6 x 2.7

3.5m Cas On-axis and Off-axis, f:10 2.7 4.6 x 3.6

3.5m Cas On-axis and Off-axis, f:45 12.2 1.0 x 0.8

3.5 Cas Slit-view, Optic I 2.5 5.0 x 3.8

3.5 Cas Slit-view, Optic II 4.3 2.9 x 2.2

3.5m Cas ALFA 2.7 4.6 x 3.6

Telescope focus	Pixel per arcsec	Field [arcmin x arcmin]	Limit [mag]
1.23m Cas	2.5	5 x 3.8	18.5
2.2m Cas On-axis and Off-axis	4.5	2.8 x 2.1	18.5
2.2m Cas Slit-view, Optic I	2.7	4.5 x 3.4	19.5
2.2m Cas Slit-view, Optic II	12.2	1.0 x 0.8
2.2m Coude
3.5m Prime K2	2.8	4.5 x 3.4
3.5m Prime K3	3.5	3.6 x 2.7
3.5m Cas On-axis and Off-axis, f:10	2.7	4.6 x 3.6
3.5m Cas On-axis and Off-axis, f:45	12.2	1.0 x 0.8
3.5 Cas Slit-view, Optic I	2.5	5.0 x 3.8
3.5 Cas Slit-view, Optic II	4.3	2.9 x 2.2
3.5m Cas ALFA	2.7	4.6 x 3.6

We apologize for the missing values, the data will be completed as soon as possible.

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Appendix

Example for a Log-File of a Guider-Session:

The meaning of the data are as following:

First line: DATE LID GWIDTH

Logical Camera ID Width for centroiding aperture

e.g. 20-May-1995 5 55

Second line: UT Hour Angle Sideral Time Deklination

e.g. 21 17 24 22 43 55.7 12 59 26.2 19 11 30

Third line: Rectaszensation Deklination Cass-Angle

e.g. 14 15 30.5 19 11 30 359.9

Following lines: PC-Time d u d v Max Counts Intensity fwhm_x fwhm_y

sec after 0.0UT [0.1"] [0.1"] in Guide window [Counts] ["] ["]

e.g. 76552 6 -10 5818 102140 4.0 3.6

Last line: UT Hour Angle Sideral Time Deklination

e.g. 21 20 10 22 46 41.7 13 02 12.3 19 11 29

DATE=20-May-1995, LID=5, GWIDTH=55
TDATA=Q   T 21 17 24 22 43 55.7 12 59 26.2  19 11 30
TDATA_35=Q   W 14 15 30.5  19 11 30  359.9
76552, 6, -10, 5818, 102140, 4.0, 3.6
76563, -3, 0, 5917, 7126, 4.3, 4.0
76572, 1, 3, 5968, 61312, 4.2, 4.3
76581, -9, 0, 5937, 182999, 4.0, 3.3
76590, 17, -6, 5921, 243100, 4.3, 4.1
76599, -11, -4, 5943, 4984, 0.0, 0.6
76608, -6, 8, 5971, 215761, 4.2, 3.6
76620, -1, 2, 5972, 165606, 4.2, 3.8
76628, 11, 0, 5965, 140409, 3.8, 3.8
76638, 0, 0, 5949, 84287, 3.8, 3.8
76644, -3, -1, 5923, 64465, 3.9, 3.7
76654, -12, 0, 5986, 45071, 4.1, 3.4
76663, 7, -6, 5933, 197904, 3.5, 3.4
76672, 4, 8, 5982, 118589, 4.2, 4.2
76683, -5, -2, 5991, 84044, 4.2, 3.3
76692, 0, -4, 5984, 121386, 4.0, 3.1
76706, 12, 2, 6014, 200839, 4.6, 3.4
TDATA_END=Q   T 21 20 10 22 46 41.7 13 02 12.3  19 11 29

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The TV-Guider Team

Project:	Uwe Graser	MPIA	graser@mpia-hd.mpg.de
Software:	Stefan Hippler	MPIA	hippler@mpia-hd.mpg.de
Electronics:	Ralf Klein	MPIA	klein@mpia-hd.mpg.de
Maintenance:	Electronic group	Calar Alto	wilhelmi@caha.es
Support:	Ulrich Thiele	Calar Alto	thiele'at'caha.es

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Uwe Graser
graser@mpia-hd.mpg.de

First line:	`DATE`	`LID`	`GWIDTH`
		`Logical Camera ID`	`Width for centroiding aperture`
e.g.	`20-May-1995`	`5`	`55`

Second line:	`UT`	`Hour Angle`	`Sideral Time`	`Deklination`
e.g.	`21 17 24`	`22 43 55.7`	`12 59 26.2`	`19 11 30`

Third line:	`Rectaszensation`	`Deklination`	`Cass-Angle`
e.g.	`14 15 30.5`	`19 11 30`	`359.9`

Following lines:	`PC-Time`	`d u`	`d v`	`Max Counts`	`Intensity`	`fwhm_x`	`fwhm_y`
	`sec after 0.0UT`	`[0.1"]`	`[0.1"]`	`in Guide window`	`[Counts]`	`["]`	`["]`
e.g.	`76552`	`6`	`-10`	`5818`	`102140`	`4.0`	`3.6`

Last line:	`UT`	`Hour Angle`	`Sideral Time`	`Deklination`
e.g.	`21 20 10`	`22 46 41.7`	`13 02 12.3`	`19 11 29`