Re: SuF02-012

From: Chris Lidman (clidman@eso.org)
Date: Thu Mar 11 2004 - 06:50:06 PST

  • Next message: Rachel G.: "Re: SuF02-012"

    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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