Re: new version of HST proposal posted - COMMENTS

From: Kyle Dawson (kdawson@lbl.gov)
Date: Fri Jan 26 2007 - 11:23:25 PST

  • Next message: Greg Aldering: "Re: new version of HST proposal posted - COMMENTS"

    I agree, let's see how a quick linear correction looks. I hadn't
    originally intended my ngal estimates to be used for this purpose, so we
    should make at least a small correction and see. It's a miracle it
    looks as good as it does now...

    Marc Postman wrote:

    > Well, if we haven't corrected Ngal for the different absolute flux
    > limits of the data that is potentially a major bias - for a fixed
    > apparent mag limit the limiting absolute magnitude reached at z=0.8
    > is 1.5 mag fainter than at z=1.4 - a non-trivial impact on any number
    > counting statistic - at least a factor of 2 - 4. I think there was a
    > suggestion to attempt a quick linear correction. Seems to me at the
    > very least that should be done (if it can be done quickly).
    >
    > On Jan 26, 2007, at 1:44 PM, prme wrote:
    >
    >> I think the figure (3b) is important to show that we are getting
    >> weak lensing results out of the data, and so needs to be in the
    >> proposal.
    >> I agree that the caption and text should emphasize that the
    >> N_gal metric is preliminary and that we are exploring with more
    >> sophisticated metrics for mass.
    >>
    >
    > -----------------------------------------------------------------
    > Marc Postman Email: postman@stsci.edu
    > STScI - CMO Phone: +1-410-338-4340
    > 3700 San Martin Drive Fax: +1-410-338-4796
    > Baltimore, MD 21218 U.S.A. http://www.stsci.edu/~postman



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