From: Alexander Conley (AJConley@lbl.gov)
Date: Thu Sep 02 2004 - 13:29:53 PDT
That could be interesting, but can probably wait until after
the blindness is removed.
It seems to me that in order to Monte-Carlo this we would
also have to make some assumptions about the host
galaxy dust distribution, but we can probably just use the
quoted values from the respective papers.
A full lightcurve simulation will probably require a
fair amount of information. It seems to me that to
fully address the question "How well can this data
set discriminate between models with intergalactic
dust and those without?" you would need to know
the dates of all observations (relative to max) for
all SNe and the photometric uncertainty on each date,
as well as assume that the host galaxy extinction values
are known.
Another question: how do you simulate lightcurves? The
SCP spectral templates (Nugent, Knop, Nobili) do NOT do
a very good job of reproducing the CMAGIC relations, so
there might need to be a little tweaking necessary to get
lightcurves that I could actually fit.
Alex
On Sep 2, 2004, at 12:44 PM, Ariel Goobar wrote:
> Hi Alex,
> what I had in mind was quite simple (too simple to be interesting?).
> If we were to assume that m_B(z) is significantely dimmed by
> IG dust, then we can estimate what the same dust density distribution
> would do to the CMAG Hubble diagram. As the dimming would affect the
> two techniques somewhat differently (right?), if the fitted cosmologies
> agree, we may be able to present yet another evidence against large
> amounts of IG dust. So, if you are intersted to try some of this, I
> could
> generate Monte-Carlo lightcurves as in your data for you to check what
> the
> actual difference would be between m_B and B(B-V=0.6) as a function of
> dust properties.
>
> Ariel
>
> On Tue, 31 Aug 2004, Alexander Conley wrote:
>>
>>> 4) Have you considered quantifying the bias from possible
>>> intergalactic dust?
>>> If you want, I can help you with synthetic data sets.
>>
>> What do you have in mind?
>>
>> Alex
>>
>>
>
> --
> ___________________________________________________________________
> Ariel Goobar (www.physto.se/~ariel)
> Department of Physics, Stockholm University
> AlbaNova University Center, SE-106 91 Stockholm, SWEDEN
> tel: +46 8 55378659 fax: +46 8 55378601
>
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