From: Robert A. Knop Jr. (robert.a.knop@vanderbilt.edu)
Date: Thu May 30 2002 - 13:27:47 PDT
WIYN MAY 31 VERSION 2.0
Here's the list of things to observe at WIYN. Candidates are listed in
the order I think they ought to be done, but feel free to mix-n-match.
What's new: added C02-029/comix (CFHT candidate) in place of T02-047
(for which we have no spectrum). Note that I do not believe that
C02-029 has a spectrum either! It is estimated at magnitude 23.11,
although I don't know in what band; I'm assuming I-band, which is the
pessimistic assumption. (R-I>0 for most SNe at the redshfits we're
talking about.) Julian asked for both R and I, which we don't have time
for; guessing that they've already got both R and I at an earlier epoch
from CFHT, what this will really give us is a stretch, and usually R is
the better band to do that in *if* they have enough earlier R followup
for that to be what is best.
Seb, Julian, Pierre, please clarify if this is not the case.
Priority key:
A -- we have a spectrum and are following; highest priority to get
a measurement for stretch purposes.
B -- we have a spectrum, data for stretch less necessary.
C -- no spectrum, but has been followed photometrically
D -- ignore this candidate; why did Rob list it?
d -- ltcv going down as of WIYN May 17
d! -- ltcv well after max as of WIYN May 17
m -- ltcv near or just after max as of WIYN May 17
??? -- ltcv doesn't make sense; possible errors in fastltcv program?
or possible errors in TNG data? (Rob: check seeings, xforms)
(Lightcurve information about T02-029 and S02-058 will hopefully come
in later.)
Mag is a weak-ass magnitude estimate from the May 17 data; typically
they will be down <~1 mag now. (These magnitudes are hopefully more
"real" than the discovery magnitude estimates, as they do attempt to put
in an aperture correction.)
As we're getting later in the lightcurve, "on-color" observations are of
primary importance to maximize our ability to measure a stretch.
Sunset: 19:31 MST
Twilight: 21:05 MST
Twilight: 3:43 MST (6:40 of night; moonrise 0:16 MST)
Sunrise: 5:17 MST
(Fields get to airmasses of >=2 by morning; press on. I've put the
brightest candidate at the end and bumped its exposure time.)
Candidate z RA(2000) Dec(2000) Time R(s) Time I(s) Prio Mag
==============================================================================
S02-064 .56 13:25:46.6 +27:34:20.9 4x900 B,d! ~24? (I)
S02-058 13:23:37.3 +27:45:05.1 --- --- D (max ~23) (I)
T02-030 .51 15:43:24.4 +07:53:57.8 3x600 4x600 A,??? 21.9? (R)
T02-028 .44 15:36:25.5 +09:28:18.2 4x900 A,d 23.0 (R)
T02-037 .49 15:46:57.0 +08:12:36.6 3x600 3x900 A,m 22.0 (R)
C02-029 14:01:52.4 +04:54:27.0 4x600 C,? 23.1 (?)
T02-047 15:36:29.9 +09:38:42.9 ---- C,m 21.8 (R)
T02-029 .22 15:37:07.5 +09:36:18.7 3x600 3x600 B,m/d 20.8 (R)
-Rob
-- --Prof. Robert Knop Department of Physics & Astronomy, Vanderbilt University robert.a.knop@vanderbilt.edu
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