Re: cluster obs requirements

From: Marc Postman (postman@stsci.edu)
Date: Fri Jan 27 2006 - 12:05:13 PST

  • Next message: marek kowalski: "Re: cluster obs requirements"

    Ah I see the z-band exposures are not as long - so all is ok - I will
    amend my calculations. No big changes.

    On Jan 27, 2006, at 3:02 PM, Marc Postman wrote:

    >>
    >> I just want to make sure we phrase it consistently. In the SNe
    >> observing requirement section we say 515 seconds exposure in I and
    >> 340 seconds in the four z-band exposures. That makes a ratio of
    >> 1:2.64. The waek lensing section says 25% to 75% which is close
    >> enough to this ratio but different from 4:1.
    >>
    >> Cheers,
    >>
    -----------------------------------------------------------------
    Marc Postman Email: postman@stsci.edu
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