Telescope: NASA IRTF, Mauna Kea Instrument: SpeX (Imager) Date: 2005 July 12 UT Conditions: Scattered cirrus, humidity 21-34%, 0.7-1" seeing, light winds File Object UT Date UT Time Airmass Filter Itime Coadds PosAngle Slit Start Finish (sec) (deg) g20050712_0001_a.fit HD 116960 2005-07-12 07:51:55 07:52:06 1.542 K 1.00 5 0.00 Mirror g20050712_0002_a.fit HD 116960 2005-07-12 07:52:13 07:52:23 1.543 K 1.00 5 0.00 Mirror g20050712_0003_a.fit HD 116960 2005-07-12 07:52:30 07:52:40 1.546 K 1.00 5 0.00 Mirror g20050712_0004_a.fit HD 116960 2005-07-12 07:52:47 07:52:58 1.548 K 1.00 5 0.00 Mirror g20050712_0005_a.fit HD 116960 2005-07-12 07:53:05 07:53:15 1.549 K 1.00 5 0.00 Mirror g20050712_0006_a.fit HD 116960 2005-07-12 07:54:31 07:54:37 1.560 H 0.50 5 0.00 Mirror g20050712_0007_a.fit HD 116960 2005-07-12 07:54:43 07:54:48 1.561 H 0.50 5 0.00 Mirror g20050712_0008_a.fit HD 116960 2005-07-12 07:54:55 07:54:60 1.564 H 0.50 5 0.00 Mirror g20050712_0009_a.fit HD 116960 2005-07-12 07:55:06 07:55:11 1.565 H 0.50 5 0.00 Mirror g20050712_0010_a.fit HD 116960 2005-07-12 07:55:17 07:55:23 1.567 H 0.50 5 0.00 Mirror g20050712_0011_a.fit HD 116960 2005-07-12 07:56:44 07:56:49 1.577 J 0.50 5 0.00 Mirror g20050712_0012_a.fit HD 116960 2005-07-12 07:56:55 07:57:01 1.579 J 0.50 5 0.00 Mirror g20050712_0013_a.fit HD 116960 2005-07-12 07:57:07 07:57:12 1.580 J 0.50 5 0.00 Mirror g20050712_0014_a.fit HD 116960 2005-07-12 07:57:18 07:57:24 1.581 J 0.50 5 0.00 Mirror g20050712_0015_a.fit HD 116960 2005-07-12 07:57:30 07:57:35 1.584 J 0.50 5 0.00 Mirror g20050712_0016_a.fit 9P/Tempel 1 2005-07-12 08:02:58 08:05:55 1.849 J 10.00 10 0.00 Mirror g20050712_0017_b.fit 9P/Tempel 1 2005-07-12 08:05:57 08:08:54 1.880 J 10.00 10 0.00 Mirror g20050712_0018_a.fit 9P/Tempel 1 2005-07-12 08:10:09 08:12:04 1.915 J 50.00 2 0.00 Mirror g20050712_0019_b.fit 9P/Tempel 1 2005-07-12 08:12:07 08:14:02 1.937 J 50.00 2 0.00 Mirror g20050712_0020_a.fit 9P/Tempel 1 2005-07-12 08:14:59 08:16:55 1.971 H 50.00 2 0.00 Mirror g20050712_0021_b.fit 9P/Tempel 1 2005-07-12 08:16:57 08:18:53 1.996 H 50.00 2 0.00 Mirror g20050712_0022_a.fit 9P/Tempel 1 2005-07-12 08:19:43 08:22:39 2.042 K 80.00 2 0.00 Mirror g20050712_0023_b.fit 9P/Tempel 1 2005-07-12 08:22:41 08:25:37 2.085 K 80.00 2 0.00 Mirror g20050712_0024_a.fit 9P/Tempel 1 2005-07-12 08:26:39 08:28:30 2.123 K 20.00 4 0.00 Mirror g20050712_0025_b.fit 9P/Tempel 1 2005-07-12 08:28:32 08:30:23 2.152 K 20.00 4 0.00 Mirror g20050712_0027_a.fit HD 116960 2005-07-12 08:33:38 08:33:48 1.965 K 1.00 5 0.00 Mirror g20050712_0028_a.fit HD 116960 2005-07-12 08:33:56 08:34:06 1.967 K 1.00 5 0.00 Mirror g20050712_0029_a.fit HD 116960 2005-07-12 08:34:13 08:34:23 1.972 K 1.00 5 0.00 Mirror g20050712_0030_a.fit HD 116960 2005-07-12 08:34:30 08:34:41 1.976 K 1.00 5 0.00 Mirror g20050712_0031_a.fit HD 116960 2005-07-12 08:34:48 08:34:58 1.979 K 1.00 5 0.00 Mirror g20050712_0032_a.fit HD 116960 2005-07-12 08:35:40 08:35:45 1.991 J 0.50 5 0.00 Mirror g20050712_0033_a.fit HD 116960 2005-07-12 08:35:52 08:35:57 1.993 J 0.50 5 0.00 Mirror g20050712_0034_a.fit HD 116960 2005-07-12 08:36:03 08:36:08 1.996 J 0.50 5 0.00 Mirror g20050712_0035_a.fit HD 116960 2005-07-12 08:36:14 08:36:20 1.998 J 0.50 5 0.00 Mirror g20050712_0036_a.fit HD 116960 2005-07-12 08:36:27 08:36:33 2.001 J 0.50 5 0.00 Mirror g20050712_0037_a.fit HD 116960 2005-07-12 08:37:21 08:37:26 2.015 H 0.50 5 0.00 Mirror g20050712_0038_a.fit HD 116960 2005-07-12 08:37:32 08:37:38 2.018 H 0.50 5 0.00 Mirror g20050712_0039_a.fit HD 116960 2005-07-12 08:37:44 08:37:49 2.020 H 0.50 5 0.00 Mirror g20050712_0040_a.fit HD 116960 2005-07-12 08:37:55 08:38:01 2.023 H 0.50 5 0.00 Mirror g20050712_0041_a.fit HD 116960 2005-07-12 08:38:07 08:38:12 2.026 H 0.50 5 0.00 Mirror g20050712_0042_dark.fit Dark 2005-07-12 08:41:42 08:42:36 1.932 H 10.00 3 0.00 Mirror g20050712_0043_dark.fit Dark 2005-07-12 08:42:54 08:43:47 1.932 J 10.00 3 0.00 Mirror g20050712_0044_dark.fit Dark 2005-07-12 08:44:12 08:45:35 1.932 K 20.00 3 0.00 Mirror g20050712_0045_dflat.fit Dome Flat 2005-07-12 08:45:52 08:47:16 1.932 K 20.00 3 0.00 Mirror g20050712_0046_dflat.fit Dome Flat 2005-07-12 08:47:41 08:48:34 1.932 J 10.00 3 0.00 Mirror g20050712_0047_dflat.fit Dome Flat 2005-07-12 08:48:51 08:49:44 1.932 H 10.00 3 0.00 Mirror g20050712_0048_dflat.fit Dome Flat 2005-07-12 08:50:09 08:51:03 1.932 J 10.00 3 0.00 Mirror g20050712_0049_dflat.fit Dome Flat 2005-07-12 08:51:11 08:52:04 1.932 J 10.00 3 0.00 Mirror Optical depth at 225 GHz measured at the Caltech Submillimeter Observatory (CSO) on Mauna Kea as function of time (UT) on 2005 Jul 12. (Precipitable water vapor above the summit of Mauna Kea can be approximated by pwv (mm) ~ 20 * Tau (225 GHz), ie: for Tau (225 Ghz) ~ 0.10, pwv ~ 2 mm). UT Tau (225 GHz) 07:54 0.054 08:04 0.056 08:13 0.053 08:24 0.061 08:34 0.048 08:43 0.051