From: Alex Conley (aconley@panisse.lbl.gov)
Date: Tue Feb 25 2003 - 10:12:30 PST
Page and column info refers to 2003-Feb-13 version
General :
(B-V)max vs. Bmax-Vmax : Greg had a question about using Bmax-Vmax vs.
(B-V)max. I can't find anyplace in the paper where it is explicitly
stated what you mean when you say U-B or R-I -- are they at B maximum or
each at their own maximum? Note that the output that you get from
snmin is (B-V)max, not Bmax-Vmax.
WMAP : Yes, as everybody is saying, you need to discuss their results.
But I should warn you that this may not be as easy as you would like,
since their papers concentrate on WMAP data combined with other data.
The best you will probably be able to do is (Spergel et al., section
6.2):
"If we include a weak prior on the Hubble Constant, H_0 > 50 km/sec
[Alex: Alan Sandage watch out!], then this is sufficient to constrain
0.98 < \Omega_{tot} < 1.08 (95% confidence interval). Combining the
WMAPext data with supernova measurements of the angular diameter distance
relationship we obtain 0.98 < \Omega_{tot} < 1.06. This confidence
interval does not require a prior on h. If we further include the HST Key
Project measurement of H_{0} as a prior, then the limits on \Omega_{tot}
improve slightly: \Omega_{tot} < 1.02 +- 0.02 [Alex: I wonder if that is
supposed to be a =, not a < ?]." So their best results include SNe data,
and are actually not as wonderful as generally proclaimed when it comes
to \Omega_{tot}.
WFPC2 not WFPC-2 : It's WFPC2 in all STScI documentation, not WFPC-2
Specific :
p 17 col 1 : duplicate then
Original: For the 11 HST supernovae in this paper, if 1998ba is omitted,
then then mean E(B-V) of the set...
Problem: Two thens.
p 18 col 1: Error bars
Original: In Figure 4, error bars have been expanded by R_{B} x E(B-V),
where...
Problem: (i) Did you mean to expand by R_B*E(B-V) or by R_B * your assumed
error in E(B-V)? Assigning an error of the same size as the correction
seems like overkill. Or maybe you mean to say that the magnitudes have
been corrected by R_B*E(B-V)?
(ii) There should be a the between Figure 4 and error bars and not
comma -- i.e. In Figure 4 the error bars have been expanded... In fact,
you might want to mention 'added in quadrature' instead of expanded.
p 20 col 2: Assumed alpha
Observation: You assume an alpha of 1.74, but it is one of your nuisance
parameters. Therefore you need to stat after the fact what value of
alpha your fit produces to show that it is consistent with the value
you used when inputting things.
p 21 col 1 : correct not correction
Original : .. for fits which do not explicitly correction for host galaxy
extinction, ...
Suggested replacement : ... for fits which do not explicitly correct for
host galaxy extinction, ...
p 21 col 1 : include not includes
Original: The solid confidence ellipses in the left panel includes the
low-redshift supernovae plus ...
Suggested replacement: The solid confidence ellipses in the left panel
include the low-redshift supernovae plus ...
p 21 col 1: missing and
Original: For comparison, the confidence intervals using all of the
low-redshift SNe, just the high redshift SNe...
Suggested replacement: For comparision, the confidence intervals using all
of the low-redshift SNe and just the high redshift SNe ...
Also : The ( ) comment following this sentence needs to be before the
period ending the sentence. Or, better yet, just drop the parenthesis and
make it a stand-alone sentence.
Alex
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