Changes between Version 11 and Version 12 of Ask_an_expert

Timestamp:

Aug 10, 2009, 2:16:14 PM (17 years ago)

Author:

pitts

Comment:

--

Ask_an_expert

@@ -99 +99 @@
 
  * How do I find out which filters/instrumental photcodes are present,
-   and to which photcodes they can be translated, in a given catdir? 
+   and to which photcodes they can be translated, in a given catdir?
+
+    '''Answer from Mark Pitts:''' The photcodes can be examined by exporting the photcode table:
+
+        1) Export photcode table from catdir to a file:
+
+           photcode-table -D CATDIR (catalog) -export (filename)
+
+        2) Examine and/or edit the file as needed
+
+        3) Import the edited file back into the catdir:
+
+           photcode-table -D CATDIR (catalog) -import (filename)
+
+           Note: the values in the catdir are not automatically updated if the photcode table is changed. You may have to rerun photometry commands (such as relphot) 
 
  * How do I find out the exposure time for a given object, and/or the "effective" exposure time of a given average magnitude?