MS1054: Just Say No

From: Spencer Adam Stanford (adam@igpp.ucllnl.org)
Date: Wed Oct 19 2005 - 15:31:50 PDT

  • Next message: Kyle Dawson: "Re: Reminder"

    While it may be true that one could find more SNe in MS1054, I'd agree
    with Henk -
    this cluster has been done over and over by HST and another 5 or so orbits
    isn't
    going to do much in terms of cluster science.

    On Wed, October 19, 2005 13:01, Kyle Dawson said:
    > I just want to send out the reminder that we do need 2 clusters to fill
    > the extra orbits left open due to guide star constraints and other
    > scheduling considerations. In looking more closely, I see that we
    > currently have 14 free orbits, and I do expect a few more to open up in
    > the course of the next few months. Targets with an RA of 09:00-10:00
    > are just rising now for HST observations, depending on DEC. As a
    > general rule of thumb, targets become visible from HST about a month or
    > two before they become visible from the ground, where ground visibility
    > is defined as 3 hr at less than 2 airmass.
    >
    > My personal favorite for a substitute cluster is still the controversial
    > and well studied MS1054. At least 8 of its members are radio sources,
    > 17% of its members are in the process of a merger, more than 80 members
    > are spectroscopically confirmed and typed, already has I' and z'
    > reference images from ACS, and is extremeley rich and massive. It also
    > has deep X-ray images and deep SZ images along with a SN from one of our
    > searched several years ago, if we get another SN in this cluster we can
    > combine the multiple measurements and write up a result for a fairly
    > well measured distance to a specific object and compare methods, which I
    > don't believe has really been done before at such high z.
    >
    > -Kyle
    >
    >

    -- 
    Adam Stanford
    UC-Davis/LLNL
    (925)432-6013
    


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