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