Re: Subaru Observation Schedule

From: Saul Perlmutter (saul@lbl.gov)
Date: Sun Dec 08 2002 - 14:15:25 PST

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

    Hi Chris and Naoki,
        I've been talking to Ariel trying to figure out what would make the most sense for the VLT/FORS2 queue time
    tonight, tomorrow and Tuesday. Here are some current thoughts:

       1) Since we are still trying to get sufficient signal-to-noise in the J-band data for 017, we should keep a
    close watch on what Naoki concludes about the i'-band signal-to-noise from the last two nights' Suburu data put
    together. But meanwhile, let's not spend FORS2 time on this yet.

        2) There are several lower redshift (z ~ 0.6) SNe for which we have nice SN spectra, and likely good
    i'-band lightcurves, including 001(which was also called 027), 055, and 025. It would be good to get an R-band
    point with S/N ~ 20 for these, since this would provide a useful color to check for extinction. In principle
    these nearer supernovae would not take too much FORS2 exposure time for this purpose: about 25 minutes each
    for 001 and 055, and 12 minutes for 025 (which would give S/N of 15 for the first two and 20 for 025).
    Including overhead, this is probably a good investment of about 75 minutes out of the 24 hours of FORS2 queue
    time we have left.

        Chris, since we don't know for sure how bright these SNe are now, would we be able to check fairly easily
    that these exposures are giving us the S/N that we expect?

        --Saul

    Naoki Yasuda wrote:

    > Dear all,
    >
    > > We will try to take more data tomorrow.
    >
    > Subaru/Suprime-Cam observation of SXDS has finished.
    > Seeing was still bad tonight.
    > We took the following data.
    >
    > SXDS_1 50min (0.7arcsec)
    > SXDS_5 108min (0.8-1.2arcsec)
    > SXDS_2 75min (1.0arcsec)
    > SXDS_4 20min (1.2-1.4arcsec)
    >
    > I'm now analyzing data, but it may not finish
    > by the FORS2 observation.
    > Most faint target is SuF02-017 except for HST targets.
    > So this may be the primary target for FORS2.
    > Next ones are SuF02-007, SuF02-071, and SuF02-037.
    >
    > The table below is the summary of my measurements till last night.
    > Negative magnitude mean that it is fainter than the reference image.
    >
    > Name R.A. (J2000) Decl. z Nov 03 Nov 06 Nov 10 Nov 28 Nov 30 Dec 7
    > SuF02-012 02:18:51.59 -04:47:24.8 1.3 25.11 0.11 25.14 0.08 25.18 0.13 26.36 0.24 25.89 0.14 26.54 0.18
    > SuF02-065 02:17:34.53 -05:00:15.4 1.18 25.15 0.07 25.44 0.09 25.19 0.10 26.54 0.33 26.11 0.11 26.76 0.19
    > SuF02-060 02:17:34.51 -04:53:46.6 1.063 24.54 0.06 24.52 0.03 24.42 0.04 24.74 0.06 24.95 0.04 25.69 0.06
    > SuF02-007 02:18:52.36 -05:01:13.2 1.18 24.80 0.06 24.87 0.05 24.98 0.07 25.78 0.18 25.73 0.09 26.27 0.10
    > SuF02-017 02:16:45.71 -05:09:51.2 1.0 24.95 0.06 25.07 0.06 24.88 0.06 26.70 0.32 26.23 0.13 26.43 0.22
    > SuF02-071 02:17:08.63 -05:02:06.4 0.928 23.83 0.02 23.82 0.02 23.86 0.02 24.76 0.06 24.79 0.04 25.51 0.06
    > SuF02-037 02:17:43.30 -04:30:56.7 0.926 24.58 0.04 0.00 0.00 24.41 0.04 0.00 0.00 25.07 0.04 0.00 0.00
    > SuF02-055 02:18:53.20 -04:32:59.2 0.66 23.72 0.02 0.00 0.00 23.71 0.02 0.00 0.00 24.42 0.03 0.00 0.00
    > SuF02-025 02:16:23.93 -04:49:29.4 0.606 24.52 0.04 24.00 0.02 23.64 0.02 23.39 0.02 23.40 0.01 23.79 0.02
    > SuF02-001 02:17:00.05 -04:58:19.6 0.57 23.38 0.02 23.41 0.01 23.34 0.02 24.09 0.03 24.22 0.03 24.90 0.04
    > SuF02-000 02:17:42.54 -05:06:34.0 0.92 24.76 0.06 24.59 0.06 24.38 0.04 24.73 0.06 24.79 0.04 25.71 0.07
    > SuF02-002 02:17:12.24 -04:55:08.7 0.822 24.41 0.03 24.35 0.03 24.36 0.04 25.41 0.07 25.59 0.08 26.20 0.11
    > SuF02-019 02:17:38.08 -05:08:46.8 0.505 24.54 0.04 24.57 0.03 24.54 0.05 25.01 0.07 24.91 0.05 25.41 0.04
    > SuF02-082 02:18:40.73 -05:03:44.3 0.623 25.28 0.08 25.26 0.09 24.96 0.07 24.92 0.10 24.71 0.04 25.22 0.04
    > SuF02-021 02:18:10.56 -04:40:20.6 0.69 24.61 0.06 0.00 0.00 26.12 0.30 0.00 0.00 -24.79 0.05 0.00 0.00
    > SuF02-077 02:18:35.15 -04:26:38.9 0.59 25.12 0.07 0.00 0.00 24.56 0.06 0.00 0.00 24.78 0.04 0.00 0.00
    > SuF02-059 02:20:28.06 -04:58:50.3 0.269 25.66 0.14 0.00 0.00 25.64 0.11 0.00 0.00 26.85 0.29 0.00 0.00
    > SuF02-081 02:20:07.55 -05:08:27.2 1.48 25.13 0.07 0.00 0.00 25.13 0.08 0.00 0.00 26.46 0.19 0.00 0.00
    >
    > ---
    > Naoki Yasuda @ National Astronomical Observatory of Japan
    > e-mail: naoki.yasuda@nao.ac.jp

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