Re: clarification on my comments about intrinsic color dispersion

From: DAHowell@lbl.gov
Date: Wed Feb 26 2003 - 23:20:17 PST

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    ----- Original Message -----
    From: Greg Aldering <aldering@panisse.lbl.gov>
    Date: Wednesday, February 26, 2003 10:08 pm
    Subject: Re: clarification on my comments about intrinsic color
    dispersion

    > > I don't see this. Our U-affected SNe in this paper are:
    > >
    > > name z stretch
    > > 97201 0.863 1.05 +/- 0.01
    > > 97226 0.778 1.06 +/- 0.04
    > > 9878 0.644 0.76 +/- 0.03
    > > 98104 0.638 1.05 +/- 0.05
    > >
    > > This spans the range in Jha's plot from the lowest U-B=-0.85 at
    > s=1.04> to the highest U-B= -0.1 at s=0.82.
    >
    > By the way, I used the SN with largest sigma E(B-V) in table 3. These
    > are:
    >
    > name z s
    > -------------------
    > sn97201 0.863 1.05
    > sn97226 0.778 1.06
    > sn98104 0.634 1.05
    > sn98184 0.740 0.95
    >

    I inadvertently left off the last one (which is 98142, not 98184
    according to Rob).

    I would assume that "highest sigma E(B-V)" means the ones that are
    farthest from the mean of the distribution. But that doesn't seem
    like what you mean from the table. Do you mean the ones with the
    highest error on E(B-V)? Isn't error on E(B-V) due to photon
    statistics, so it is very roughly proportional to redshift? I don't
    see the significance of that. I'm still unclear on what you mean, but
    we can talk about that at the conference call.

    -Andy

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