Re: Suprime-Cam z-band included, updated 12/17/04

From: Gerson Goldhaber (g_goldhaber@lbl.gov)
Date: Fri Dec 17 2004 - 14:04:21 PST

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    Gerson update 12/17/04
    Hi All,
    I have corrected the error values. The errors include 0.17 in
    quadrature. I show hubble curves explicitly for Omega_M = 0.2,0.3,0.4
    and 1.0 to be able to read off sensitivity. I show the curves with empty
    universe subtracted. These are universal for U and B-band. I also show
    an image with both U amd B fits given.

    I have run a test to see how sensitive our results are to a 0.1
    uncertainty in z. I chose SN 065 which is at z=1.181 and fitted it for
    the ficticious value z=1.281. Rollin supplied me with the corresponding
    k-corrections. The curves with the empty universe subtracted are
    particularly insensitive to the exact z value. For z=1.2 and 1.3 the
    Omega_M = 0.2 curve goes from 0.015 to 0.011 for example.
    The results of the fits are:
    z M_u M_b s
    1.181 25.46(0.047) 25.87(0.099) 0.951(0.053)
    1.281 25.45(0.047) 25.73(0.098) 0.940(0.048)

    I think these small changes are good news for using photo z values in
    this z region.

    The new images are on the Subaru section of the TWiki for this date. 

    -- 
                        cheers Gerson

    Gerson Goldhaber
LBNL MS 50R2008
Berkeley, CA 94720
Tel. (510) 486-6210
Fax  (510) 486-6738

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