Re: Subaru Observation Schedule

From: Saul Perlmutter (saul@lbl.gov)
Date: Sat Dec 07 2002 - 10:18:30 PST

  • Next message: clidman@eso.org: "Re: Subaru Observation Schedule"

    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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