WFPC2 V2: HEADER Comparison between PC1 and WF3

I downloaded 187 associations from the test set. List of the 187 cases

For each association I got the PC1 and the WF3 chips (u.......b_[13].fits).

Header Keyword Comparison

For each association I compared the headers keywords (not values) of the two chips to see if they are consistent.

The statistics of the values of each keyword for PC1 and WF3:

Note: Keywords having all zero stats params are very likely non-numeric, or otherwise (e.g. ERRCNT) their value is always truly 0.

I compared such statistics to see which keywords have the same statistics (hence I would say the same values in both chips), and which ones not.

What's the meaning of these keywords? I got the answer. (They happen to all have constant values throughout all associations (var=0)).

23 March 2005