From: Saul Perlmutter (saul@lbl.gov)
Date: Mon Jul 12 2004 - 18:28:59 PDT
Here's what Lifan had sent...
attached mail follows:
Hi,
If we decide to do a CMAGIC study, the strategy seems to be quite
obvious. We will be able to do only one supernova with the remaining
orbits for SNe at z > 1.3.
For SN at z = 1.6, allowing 11 orbits for a grism spectra, this will
lead to a modification of strategy I (in Rachel's notes )in the following
way: (a) the last data point in I be saved and be used for J (1 orbit)
and H (2 orbits) band; (b) the dates for J and H observations be
re-organized to: 5-6, 15-16, 25-26, and 35-36, for both bands.
For SN at z = 1.3, allowing for 9 orbits for a grism spectra, the
modifications to strategy "H" is: (a) for z band, the dates of
observations are on 0 (1 orbit), 11-12 (1 orbit), 21-22 (2), 26-27
(2), 31-32 (3), 41-42 (3); (b) the dates for J-band can be: 5-6 (1),
11-12(1), 21-22(1), 26-27 (1) 31-32 (1), and 41-42 (1); (c) the dates on
H-band: 5-6 (2), 31-32 (2), and 41-42 (2).
With this set up, the CMAG errors are 0.11 mag, and 0.09 for z = 1.6 and
z = 1.3. These errors are comparable to the errors on the magnitudes at
maximum.
If we decide to skip the grism spectra, we may observe another
supernova at lower redshift, but the coeverage may not be that good.
Cheers,
Lifan
-- http://panisse.lbl.gov/~lifan Lifan Wang (510) 495 2733 (o) (510) 704 0119 (h)
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