From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Tue Oct 28 2003 - 15:35:22 PST
For each search, we should have for different follow-up possibilities
available, to be chosen via TOO. Note that in all cases, the orbit
count includes IR final references. Estimates below for R-I are based
on the z-J color, *not* on the J-H color. Note that both z and J are
contributing to the stretch here.
#1 : Low-redshift, no grism needed.
4 orbits in z, spaced as Rachel did
3 orbits in J, spaced as Rachel did
2 orbits in H at the first epoch
(save 3 J, 2 H orbits for final ref)
TOTAL = 14 orbits
WORST CASE z=1.3 (usually we do better!)
ds = 0.09
dt = 2.5
dmbcorr = 0.15
d(R-I) = 0.038
==> For a galaxy with a very good photo-z
#2 : Low-redshift, grism needed
4 orbits in z, spaced as Rachel did
3 orbits in J, spaced as Rachel did
2 orbits in H at the first epoch
7 orbits grism
(save 3 J, 2 H for final reference)
TOTAL = 21 orbits
Worst case as #1
#3 : High-redshift, no grism needed
8 orbits in z, spaced as Rachel did
3 orbits in J, spaced as Rachel did
2 orbits in H at the first epoch
(save 3 J, 2 H for final referenced)
TOTAL = 18 orbits
WORST CASE z=1.5
ds = 0.08
dt = 2.2
dmbcorr = 0.14
d(R-I) = 0.046
===> For a galaxy with a very good photo-z
#4 : High-redshift, grism needed
8 orbits in z, spaced yadda yadda
3 orbits in J
2 orbits in H
(save 3 J, 2 H for final reference)
11 orbits grism
TOTAL = 29 orbits
Worst case as in #3.
-Rob
-- --Prof. Robert Knop Department of Physics & Astronomy, Vanderbilt University robert.a.knop@vanderbilt.edu
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