Re: further thougths on CMB vs. Helio redshifts

From: Michael Wood-Vasey (wmwood-vasey@lbl.gov)
Date: Wed Apr 16 2003 - 09:40:42 PDT

  • Next message: Alex Conley: "Re: further thougths on CMB vs. Helio redshifts"

    On Wed, Apr 16, 2003 at 11:34:26AM -0500, Robert A. Knop Jr. wrote:
    > On Wed, Apr 16, 2003 at 09:31:06AM -0700, Michael Wood-Vasey wrote:
    > > Using CMB-based redshifts for everything is fine _if_ you transform
    > > your observations from our frame to the CMB frame. This means the
    > > time, wavelength (including bandwidth), and energy of our observations
    > > all have to be corrected if you want to do this completly in the CMB
    > > frame.
    >
    > Too late to do all that. Plus, I'd want to think a bit more, because
    > trying to put these sorts of corrections into your K-corrections is
    > the sort of thing that's very easy to do slightly wrong....

    Hmmm....

    I see how this makes that a little more complicated because you're
    essentially doing two K-corrections.

    Okay, I see how that would be a little work. Given that, I'm happy
    doing things however you think best, as long as we all understand the
    issue.

     - Michael

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