From: Saul Perlmutter (saul@lbl.gov)
Date: Wed Nov 13 2002 - 03:43:05 PST
Ok, here's a quick update of our current status: We are observing a
few alternative targets here at Subaru right now, because we don't think
we can improve (in any feasible amount of tonight's eposure time) on the
spectra of the candidates that are our current favorites to go to
HST. If one of these turns out to be a much easier/cleaner choice (or
on elliptical host, as indicated by photo-z for one of our alternative
targets) then we can substitute it for one of the current favorites.
The current favorites for HST followup are:
060 (mostly because it's on very likely elliptical host) at z =
1.063 from galaxy H & K lines
017 already has very nice ground-based spectrum, so we would be
likely _not_ to go for an ACS grism on it. z = ~1.0
065 only worry about this one is that it may be a little further
past max since we can't tell for sure that there is no light in the
reference image. z = 1.18 from galaxy OII
The current concept is that we would then follow 071 from the ground
with the VLT and Subaru time. This one is nice SN at z=0.928 (redshift
from host galaxy lines).
The ones we are currently re-observing to see if they would make good
alternatives are:
061 in previous nights' data, this one had clear galaxy line at z
= 1.08
012 (this one is on very likely elliptical, perhaps in cluster) in
previous nights' data z = 1.3 would match SN, but this would be more
exciting with more signal.
007 in previous nights' data z =1.18 would match
Note that 081 (the surprisingly plausible SN at z=1.48 -- redshift from
host galaxy lines) is not in this list, because the HST observing setup
we have is not tuned for this redshift. If we end up deciding we like
this candidate within the next week or so, we will send in a director's
time request for 4 or 8 orbits that would give us a "CMAGIC" color point
later in its lightcurve.
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