From: Alex Conley (aconley@panisse.lbl.gov)
Date: Tue Nov 05 2002 - 18:02:06 PST
I have started trying to find the candidates that Mamoru and company
report but that we did not find. So far I have examined the SXDS_2
candidates. I will give them in the order that Naoki did in his email
SXDS_2
SuF02-012 0 0
SuF02-055 0 1
SuF02-077 1 1 This is on our subtractions, but has a %10 increase,
so we didn't save it. I have now saved it.
Gap 1 1 This is in the interchip gap, so we can't see it
SuF02-021 2 0
Top 2 0 This is off the top of chips c/d, so we don't see it
SuF02-051 3 0
SuF02-037 3 1
Top 4 1 This is off the top of chip j, so we don't see it.
To explain this top/gap thing: We coadded to the central chip positions
only. That means that there are regions between the chips, and on the
sides of the overall array where there are images (at reduced depth),
but that aren't covered in our subtraction. We building larger frames
last year with poor results. This is because of ill constrained
transforms between imgages. Subaru/SCP ties their subtractions to an
overall geometric solution, so they are able to use these regions.
At one point we talked about doing a 'shifted' set of subtractions, but
we barely managed to get these to work as it was. If we continue
searching with Subaru every year, it will probably be worth our while
to implement stuff based on the overall optical solution, but it obviously
won't happen in time for this data.
Alex
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