Changes between Version 40 and Version 41 of WikiStart/Documentation

Timestamp:

Jul 6, 2022, 1:48:30 PM (2 years ago)

Author:

bone

Comment:

--

WikiStart/Documentation

@@ -51 +51 @@
 Since then, the 70 cm telescope was mainly used to demonstrate the behavior and work of a professional telescope to visiting groups of for small observational programs of members of the institute. 
 
-In 2014 a CCD and its control electronics was installed. This upgrade from the more than 20 years old system provided the telescope with a operational CCD with hopefully at least another 20 years to go. This CCD is currently in operation.
-During 2020 the computer old computer (from 2014) was renovated and the CCD control software migrated to the new computer.  
-Although the telescope remained operable, it saw less and less use as time went by.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
+In 2014 a CCD and its control electronics were installed. This upgrade from the more than 20 years old system provided the telescope with an operational CCD with hopefully at least another 20 years to go. This CCD is currently in operation.
+During 2020 the old computer (from 2014) was renovated and the CCD control software migrated to the new computer.  
+
+Although the telescope remains operable, it sees less and less use as time goes by.    \\                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
 
 
@@ -73 +74 @@
 Mirrors were purchased from Kaufmann in Crailsheim.
 Base is filled with sand (approx. 1.5t), front ring is foamed.
-Lead weights (for balancing) cast at the MPIA, balancing weights for hourly axis
+Lead weights (for balancing) cast at MPIA, balancing weights for hourly axis
 (counterweight) can be moved by electric push-buttons on the console.
 The resolution of the incremental position encoders is 50 marcsec.
@@ -93 +94 @@
   Last time performed: 2004.
 
-  Foreseen to be re-coated periodically: Recommended for Spring 2013 (did not happened).
+  Foreseen to be re-coated periodically: Recommended for Spring 2013 (did not happen).
 
 {{{
@@ -111 +112 @@
 }}}
 
+{{{
+-----Translation by DeepL----
+At that time, this was already done via e-procurement, so there should still be a paper trail in purchasing.
+
+If necessary, ask LS Hamburg who the contact person for steaming is, then find an appointment with them and ask for the price, then organize transport via our administration.
+
+At that time Arnis Levits (alevits@hs.uni-hamburg.de) was the contact, steaming cost 1300.- net.
+
+Our primary and secondary mirrors fitted in at the same time, making it cheap. 
+
+But now both have a SiO2 layer on top, so they can be cleaned gently without detaching the aluminum.
+
+After re-installation, I only took intra-/extrafocal pupil pictures. They looked good.
+
+The mirror mounts are quite precise, so we did not do any readjustments.
+I don't know of any other documentation.
+}}}
+
 
 = Upgrade plans (in the future) =
@@ -116 +135 @@
 
  * Pointing model of the telescope shall be recalibrated with images with uniform distribution on the sky. A minimum of ~ 40-65 images are needed. If you want to volunteer for this task, please contact Conchi Cardenas.
- * Automatic defocus (change for each filter. Some runs shall be perform for each filter and epoch. If you want to volunteer for this task, please contact Conchi Cardenas.
- * Tracking issue (gets stuck, or jumps once in a while). Investigate this issue is needed too. If you want to volunteer for this task, please contact Conchi Cardenas.
+ * Automatic defocus (change for each filter. Some runs shall be perform for each filter and epoch. If you want to volunteer for this task, please contact André Boné (bone@mpia.de).
+ * Tracking issue (gets stuck, or jumps once in a while). Investigate this issue is needed too. If you want to volunteer for this task, please contact André Boné (bone@mpia.de).
  * Maintenance plan for camera and telescope.
  * Have a webcam (on TRAC) from inside the dome, and maybe link other cams from outside