From: Ariel Goobar (ariel@physto.se)
Date: Sun Apr 21 2002 - 12:24:37 PDT
Hi Chris,
if S02-032 turns out to be somewhat overluminous, such as the
discovery I-band magnitude would seem to indicate it would
seem natural to expect it to be as overluminous in J (V in restframe).
It would then put the J peak brightness to somewhere between the
two observations of Beeethoven 24 and 47 days past max.
If I look at the exposure lengths we had then (1 hour each) and
S/N~5-7.5, my conclusion is that 3-4 hours in excellent conditions might
be all we need. Do you agree?
What do you think are the chances of making a quick analysis of the
data after a few hours of exposure?
Cheers,
Ariel
On Sun, 21 Apr 2002, clidman wrote:
> Dear Ariel,
> I will ask the VLT to target S02-032 tonight. Conditions
> on Paranal have deteriorated over the last 24 hours. There is
> a strong wind from the North which, if it continues, will prevent
> them from observing S02-032.
>
> Cheers, Chris.
>
> Ariel Goobar wrote:
>
> > Hi,
> > I tend to agree with both Chris and Isobel about the high risk
> > of trying to do both targets at NIRI under the current conditions. It
> > seems to me that it would be sensible to go for the brighter z=1.08
> > target, S02-032, with ISAAC tonight and tomorrow.
> >
> > The 2 x z=0.5 guys for which we also got ISAAC time should be left
> > for the May run, where we should be able to make better optical
> > lightcurves.
> >
> > Ariel
> >
> > On Sun, 21 Apr 2002, clidman wrote:
> >
> > > Hi Isobel,
> > > The ISAAC schedule has been fluid these past two weeks because of technical problems
> > > with the instrument. The 21st an 22nd are service nights. The 23rd to 25th are reserved
> > > for VLTI commissioning and the 26th is a technical night which might be switched to service.
> > > The 27th to 30th are full service nights and the 1st to 3rd are service for the 1st half of the night.
> > >
> > > Cheers, Chris.
> > >
> > >
> > > Isobel Hook wrote:
> > >
> > > > Hi all,
> > > >
> > > > OK well it sounds as though it may not be worth going for a host for
> > > > Satie this NIRI run. If it turns out we dont get to use all our NIRI time
> > > > this run then doing Satie in June is still a possibility (There is no NIRI
> > > > time available in May).
> > > >
> > > > I quite agree with Chris that these observations can take a long time and
> > > > we dont have much of a window. We are hoping to use essentially the whole
> > > > of the upcoming NIRI run (4 nights) so if everything goes perfectly we'll
> > > > get two targets. However banking on a NIRI run going perfectly is probably
> > > > not all that sensible at this stage so maybe we should start one SN with
> > > > ISAAC now.
> > > >
> > > > However I am confused about when ISAAC is availble.
> > > > Chris wrote:
> > > >
> > > > > Because of this problem, ISAAC has been rescheduled to service until
> > > > >the 18th.
> > > > >The 19th is scheduled as technical and may become service. So there is a
> > > > >small window
> > > > >of opportunity to do one candidate now. Service observing restarts on the
> > > > >23rd.
> > > >
> > > > So What is happening now (19-22nd)? Is that time available? Also is
> > > > "service" time the same as queue, i.e. available to us or not? (Is Tony's
> > > > plan on the web correct now? It shows VLTI commissioning 23,24,25).
> > > >
> > > > The disadvantage of using ISAAC now is that this would mean we have less
> > > > ISAAC time next month, when we dont have NIRI time either. Obviously this
> > > > needs to be decided pretty soon. How is this going to be finialised?
> > > >
> > > > Isobel.
> > >
> >
> > --
> > ___________________________________________________________________
> > Ariel Goobar (ariel@physto.se)
> > FYSIKUM, Stockholm University
> > Stockholm Center for Physics, Astronomy & Biotechnology
> > tel: +46 8 55378659
>
-- ___________________________________________________________________ Ariel Goobar (ariel@physto.se) FYSIKUM, Stockholm University Stockholm Center for Physics, Astronomy & Biotechnology tel: +46 8 55378659
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