From: Chris Lidman (clidman@eso.org)
Date: Thu Mar 11 2004 - 06:50:06 PST
Hi Rachel, Vallery,
Could either of you provide Andy with the ACS spectrum of SuF02-012
together with an error spectrum. It might be interesting to combine
the ACS/VLT/Subaru spectra into a single spectrum.
Does anybody know who reduced the ESI data on SuF02-012?
Cheers, Chris.
On Wed, 2004-03-10 at 13:37, Chris Lidman wrote:
> Hi Andy,
> Thanks for the plot.
>
> The Subaru data is available from http://www.sc.eso.org/~clidman/#L2742
>
> I weighted the VLT and Subaru spectra (using the error
> spectra) before combining them. In principle, one could add the ESI and
> ACS data as well if the the error spectra for these supernova are
> available. The ACS data appear to be in good agreement with
> the VLT and Subaru data. I know very little about the ESI
> data. You might have to ask Rachel, Vallery and Greg about the
> ACS/ESI data.
>
> Cheers, Chris
>
>
>
>
>
>
> On Wed, 2004-03-10 at 11:52, Andy Howell wrote:
> > You are right -- I attached the wrong plot! Here is the correct one.
> > The ACS plot looks pretty good.
> >
> > Your first mail said that it was a combined Subaru and VLT plot. I didn't
> > even know there was Subaru data on this one. According to the
> > spectroscopy web page we have ESI data as well.
> >
> > Any chance you could make a combined ESI, FORS1, Subaru, ACS spectrum,
> > maybe combining weighted by the errors? I think Peter has a program to
> > do such a thing. If not, if all of these have error spectra, I could
> > write something to do the rebinning and combination -- I have most of the
> > framework already for my program.
> >
> > -Andy
> >
> > On 10 Mar 2004, Chris Lidman wrote:
> >
> > > Hi Andy,
> > > Thanks for the plots. The first one seems to be a plot
> > > of SuF02-002. Perhaps, you attached the wrong PostScript file.
> > >
> > > I've cc'ed this e-mail to Rachel and Vallery as both have been
> > > involved in the reduction of the ACS data on this elusive candidate.
> > >
> > > I attach a comparison plot of the VLT/ACS data that was sent to me
> > > by Vallery. The ACS data also show a dip at ~9200 Angstroms.
> > > If this is Si4000, then this might point to a type Ia at z=1.26.
> > >
> > > Cheers, Chris.
> > >
> > > On Tue, 2004-03-09 at 21:46, Andy Howell wrote:
> > > > Chris,
> > > > This spectrum is better! I get z ~ 1.26, or z ~ 1.02 (see attached). I
> > > > prefer z=1.02.
> > > >
> > > > -Andy
> > > >
> > > > On 8 Mar 2004, Chris Lidman wrote:
> > > >
> > > > > Hi Andy,
> > > > > I've combined the Subaru and VLT spectra of SuF02-012 into a
> > > > > single spectrum. The spectrum and the associated error spectrum are
> > > > > available at
> > > > >
> > > > > http://www.sc.eso.org/~clidman/
> > > > >
> > > > > This candidate has been placed at various redshifts, anywhere from
> > > > > z=0.9 to z=1.6. The wiggles in the combined spectrum are more
> > > > > pronounced, but finding a redshift will be hard.
> > > > >
> > > > > Cheers, Chris.
> > > > >
> > >
> >
>
>
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