Changes between Version 217 and Version 218 of PublicPages/MayallZbandLegacy/NotesforObservers

Timestamp:

Oct 2, 2017 5:57:37 PM (7 years ago)

Author:

Benjamin Alan Weaver

Comment:

--

PublicPages/MayallZbandLegacy/NotesforObservers

@@ -318 +318 @@
     }}} 
     where `Ttruss` is in deg C. If the temperature is >18C, the following might work better:
-   {{{
+    {{{
 Focus(zd) = -10940+(22.9-Ttruss)x110
-   }}}
+    }}}
+    For convenience, you can create these two Python functions:
+    {{{
+focus = lambda x: -8400 + (1.4 - x)*110
+focuswarm = lambda x: -10940 + (22.9 - x)*110
+    }}}
  1. Ask the telescope operator to point to an MzLS coordinate to do the pointing check. We like to pick a coordinate which is close to the meridian and still within the footprint. For the start of B semester nights in August-October, please use the pointing coordinate 280.0, +50.0. At other times, you can use the first tile in the json file in pass 3 (for normal case, or json of forced pass if starting up non standard). The coordinates of the first tile can be found by:
     {{{