Re: Subaru Observation Schedule

From: clidman@eso.org
Date: Sat Dec 07 2002 - 11:49:41 PST

  • Next message: Naoki Yasuda: "Re: Subaru Observation Schedule"

    Dear Saul,
        I've just found out that tonight on FORS2 has been rescheduled as a visitor night.
    Apparently, the change was made last week.

    Cheers, Chris.

    Saul Perlmutter wrote:

    > Hello Naoki,
    > There are two questions that might help decide what we might ask VLT/FORS2 to
    > observe during the next few nights:
    > 1) Have we reached sufficient signal-to-noise for the -071 and -017?
    >
    > 2) Have we ever obtained any observations with Suprime-Cam in a second filter band
    > (to get color measurement to determine extinction) for the lower redshift supernovae
    > that we are still following in field 1 and 5? This could have happened during any of
    > the observation periods from the search period onward. These observations may not be
    > very "expensive" for FORS2 to get in terms of exposure time, since they would be for
    > lower redshift supernovae, but they would make a big difference in terms of being able
    > to use thse supernove on a hubble diagram.
    >
    > It's probably hard to do, but if you can answer the second question before
    > tonight's FORS2 time, we might start asking for some second-color observations as soon
    > as possible.
    >
    > Good luck with tonight's Subaru observing! --Saul
    >
    > clidman@eso.org wrote:
    >
    > > Dear Naoki,
    > > Thank you for the update.
    > >
    > > FORS2 is currently scheduled in service mode. The last night starts on the 10th.
    > > Please let me know if we should start observing with FORS2.
    > >
    > > From the FORS2 ETC, one can reach a S/N of 13 for I_vega=25 in 7200
    > > seconds and 0.8" seeing. From the Suprime-Cam ETC, one can reach a
    > > S/N of 14 under the same conditions.
    > >
    > > Cheers, Chris.
    > >
    > > Naoki Yasuda wrote:
    > >
    > > > Dear all,
    > > >
    > > > > Our final observation will be 12/6 and 7 (HST).
    > > > > We are planning to take the following fields.
    > > > >
    > > > > Field Exp.time
    > > > > SXDS_1 75min
    > > > > SXDS_5 100min
    > > > > SXDS_2 75min
    > > > > SXDS_4 100min
    > > >
    > > > Tonight weather condition was not good.
    > > > Dome was closed several time due to high humidity and
    > > > seeing was bad, 0.7-1.0 arcsec.
    > > > We took 100min/63min exposures for SXDS_1/SXDS_5.
    > > >
    > > > We will try to take more data tomorrow.
    > > >
    > > > ---
    > > > Naoki Yasuda @ National Astronomical Observatory of Japan
    > > > e-mail: naoki.yasuda@nao.ac.jp

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