From: Naoki Yasuda (naoki.yasuda@nao.ac.jp)
Date: Sun Dec 08 2002 - 20:52:36 PST
Hi Saul,
> 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.
I have checked the Subaru data of last two nights, but the object is very
faint and I do not think signal-to-noise ratio is sufficient.
Current S/N is 4-5.
> 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.
I have checked the log of SXDS observations and found that
SXDS_2 and SXDS_5 were observed with R-band.
SXDS_2 included -055 and SXDS_5 includes -025 and -001.
The following is the summary of exposures.
SXDS_2 SXDS_5
Nov02 40min(0.72)
Nov03 40min(0.78)
Nov10 32min(0.70) 32min(0.55)
Numbers in parentheses are seeing.
The reference images are not available for these data.
--- Naoki Yasuda @ National Astronomical Observatory of Japan e-mail: naoki.yasuda@nao.ac.jp
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