Summary of chop-nod analysis tele(formerly-skype)con of June 11, 2008

Mike, Hiroko, John, Giles, Lero

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analysis of M82 data

Lero got a nice result from Mike's r.c.s. code, but he used 
sharp_combine v4 and very recently we learned that sharp_combine v5 
is needed.

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Mike's r.c.s. code:

Updated version of rcs software and updated readme file available 
on zamin

One new feature is that one can now inflate the errors - acting on 
the sharpcombine output ("update" flag)

Can print a map of I / sig-I ("debug" flag)

The code now outputs some useful info when you type the command 
without arguments...

Mike is having trouble with the NaN on zamin ... John has an idea 
about the NaN ... it works now!  (real time collaborative debugging 
at work!)  so now Mike's r.c.s. code is fully working and available 
on zamin.

The new README file is in the bin directory on zamin, by the way.

Lero is having trouble compiling on his Mac.  The trouble is that 
it cannot find a library.  John is using a powerpc and so is Mike, 
but Lero is using an Intel machine.  This could be the origin of 
the problem?  It seems to be an issue of where different library 
calls are stored.

John points out that the -a flag is unnecessary since the info is 
in the files.

John suggests that the "command line help" should include a 
reference to the README file

Giles suggests that the -update flag should not be used with the 
-v4 flag ... perhaps the readme file should note that these two 
should not be used together - or the code could prevent it

reducechi21333 (spelling?) is a script that is available for use 
with Mike's rcs code.  John suggests that this should be in the bin 
directory and there should be a mention of this in the README file.

There is an extra sharpcombine line in Mike's script that for some 
reason Mike had to add to his script because for some reason the 
last line is never executed, so the last line could just say "Merry 
Christmas".

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Giles work on L 1527 (Nov. 2007 run):

Mike got an r.c.s of about 1.6 for the 3 bins devised by Giles (see 
Giles postiing on the analysis logbook for a description of these 3 
bins).  This was done with sharpcombine v5.

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John's work on polsharp4

John points out that polsharp4's grey-scale works OK but some of 
the contours did not look correct.  This may have to do with what 
the minimum flux level is.  OK for conference presentations but not 
for publication.