From: Tony Spadafora (ALSpadafora@lbl.gov)
Date: Thu Jul 01 2004 - 19:53:20 PDT
HST search,
Rachel and I just went over the distribution plan and propose the
follow. The attached spreadsheet has the details.
By orbit ratio of 19/33 they get 5.5/we get 9.5 tiles. We propose to
give them the 5 contiguous tiles Adam suggested plus the (north) half
of 35 -
this is 29,30,33,34,36 and north half of 35. The extra half-tile
brings us very close to the desired target - whether you consider tiles
unweighted or weighted by overlap with the May search, this comes to
within a few percent of the target ratio (see the spreadsheet).
The two tiles which we think have a higher than normal probability of
failure due to guide star limitations are 29 and 30 (in Adam's
section.) If they or any tile fails in one team's area, they get the
remaining half of tile 35. This will bring the ratio to 9/5, which is
close 33/19.
In the unlikely event that a SN falls on the edges of two adjacent
tiles, then we do something appropriate like rolling a die with 1-4
for us, 5-6 for them.
Does dividing in contiguous blocks change our probability of finding a
high z SN? For z>1.2 , the statistics for the past two searches (plus
what they found in the North in the GOODs search) seems too low to say
anything about clustering.
-Tony and Rachel
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