Telescope: NASA IRTF, Mauna Kea Instrument: MIRSI Date: 2005 July 18 UT Conditions: Scattered cirrus, humidity 7-53%, 0.8" seeing, winds SE 13-17 mph File Object UT Date UT Time Airmass Bandpass Itime Frame Time Mode Start Finish (micron) (sec) (msec) m20050718_0023.fit HR 5340 2005-07-18 05:12:47 05:13:07 1.004 8.7 1.0 60 Chop/Nod m20050718_0024.fit HR 5340 2005-07-18 05:13:56 05:14:16 1.004 8.7 1.0 60 Chop/Nod m20050718_0025.fit HR 5340 2005-07-18 05:16:02 05:16:22 1.005 11.6 1.0 60 Chop/Nod m20050718_0026.fit HR 5340 2005-07-18 05:16:39 05:16:59 1.005 11.6 1.0 60 Chop/Nod m20050718_0027.fit HR 5340 2005-07-18 05:17:42 05:18:02 1.006 12.5 1.0 60 Chop/Nod m20050718_0028.fit HR 5340 2005-07-18 05:18:13 05:18:33 1.006 12.5 1.0 60 Chop/Nod m20050718_0030.fit HR 5340 2005-07-18 05:20:57 05:21:19 1.007 18.4 1.0 24 Chop/Nod m20050718_0031.fit HR 5340 2005-07-18 05:21:35 05:21:57 1.008 18.4 1.0 24 Chop/Nod m20050718_0036.fit HR 5340 2005-07-18 05:28:44 05:29:12 1.012 10.4 1.0 12 Chop/Nod m20050718_0037.fit HR 5315 2005-07-18 05:36:47 05:37:07 1.181 8.7 1.0 60 Chop/Nod m20050718_0038.fit HR 5315 2005-07-18 05:37:28 05:37:48 1.182 8.7 1.0 60 Chop/Nod m20050718_0039.fit HR 5315 2005-07-18 05:39:15 05:39:35 1.184 11.6 1.0 60 Chop/Nod m20050718_0040.fit HR 5315 2005-07-18 05:39:45 05:40:05 1.184 11.6 1.0 60 Chop/Nod m20050718_0041.fit HR 5315 2005-07-18 05:40:30 05:40:50 1.185 12.5 1.0 60 Chop/Nod m20050718_0042.fit HR 5315 2005-07-18 05:41:02 05:41:22 1.186 12.5 1.0 60 Chop/Nod m20050718_0043.fit HR 5315 2005-07-18 05:42:06 05:42:28 1.187 18.4 1.0 24 Chop/Nod m20050718_0044.fit HR 5315 2005-07-18 05:43:07 05:44:03 1.189 18.4 4.0 24 Chop/Nod m20050718_0045.fit HR 5315 2005-07-18 05:45:01 05:45:57 1.191 10.4 4.0 24 Chop/Nod m20050718_0046.fit HR 5315 2005-07-18 05:46:53 05:47:49 1.194 10.4 4.0 24 Chop/Nod m20050718_0047.fit HR 5315 2005-07-18 05:48:20 05:49:16 1.196 10.4 4.0 24 Chop/Nod m20050718_0048.fit HR 5315 2005-07-18 05:49:37 05:49:59 1.197 10.4 1.0 24 Chop/Nod m20050718_0049.fit 9P/Tempel 1 2005-07-18 05:53:56 05:56:02 1.283 10.4 10.0 24 Chop/Nod m20050718_0050.fit 9P/Tempel 1 2005-07-18 05:57:55 06:02:23 1.291 10.4 20.0 20 Chop/Nod m20050718_0051.fit 9P/Tempel 1 2005-07-18 06:03:58 06:09:56 1.305 11.6 40.0 60 Chop/Nod m20050718_0052.fit 9P/Tempel 1 2005-07-18 06:10:43 06:16:41 1.321 11.6 40.0 60 Chop/Nod m20050718_0053.fit 9P/Tempel 1 2005-07-18 06:17:06 06:23:04 1.338 12.5 40.0 60 Chop/Nod m20050718_0054.fit 9P/Tempel 1 2005-07-18 06:24:05 06:30:03 1.359 12.5 40.0 60 Chop/Nod m20050718_0055.fit 9P/Tempel 1 2005-07-18 06:31:38 06:37:36 1.384 8.7 40.0 60 Chop/Nod m20050718_0056.fit 9P/Tempel 1 2005-07-18 06:40:49 06:49:27 1.417 8.7 80.0 120 Chop/Nod m20050718_0057.fit 9P/Tempel 1 2005-07-18 06:51:14 06:59:52 1.461 8.7 80.0 120 Chop/Nod m20050718_0058.fit 9P/Tempel 1 2005-07-18 07:04:13 07:08:13 1.524 18.4 20.0 24 Chop/Nod m20050718_0059.fit 9P/Tempel 1 2005-07-18 07:12:22 07:22:14 1.570 18.4 45.0 20 Chop/Nod m20050718_0063.fit HR 5340 2005-07-18 07:38:55 07:39:17 1.292 11.6 1.0 24 Chop/Nod m20050718_0064.fit HR 5340 2005-07-18 07:40:13 07:40:35 1.298 11.6 1.0 24 Chop/Nod m20050718_0065.fit HR 5340 2005-07-18 07:40:39 07:41:01 1.300 11.6 1.0 24 Chop/Nod m20050718_0066.fit HR 5340 2005-07-18 07:42:41 07:43:03 1.309 8.7 1.0 24 Chop/Nod m20050718_0067.fit HR 5340 2005-07-18 07:44:27 07:44:49 1.317 8.7 1.0 24 Chop/Nod m20050718_0068.fit HR 5340 2005-07-18 07:46:00 07:46:20 1.324 8.7 1.0 60 Chop/Nod m20050718_0069.fit HR 5340 2005-07-18 07:47:08 07:47:28 1.330 8.7 1.0 60 Chop/Nod m20050718_0070.fit HR 5340 2005-07-18 07:49:00 07:49:20 1.339 8.7 1.0 60 Chop/Nod m20050718_0071.fit HR 5340 2005-07-18 07:50:19 07:50:39 1.345 8.7 1.0 60 Chop/Nod m20050718_0072.fit HR 5340 2005-07-18 07:52:13 07:52:33 1.355 11.6 1.0 60 Chop/Nod m20050718_0073.fit HR 5340 2005-07-18 07:52:50 07:53:10 1.358 11.6 1.0 60 Chop/Nod m20050718_0074.fit HR 5340 2005-07-18 07:54:51 07:55:11 1.368 12.5 1.0 60 Chop/Nod m20050718_0075.fit HR 5340 2005-07-18 07:55:26 07:55:46 1.371 12.5 1.0 60 Chop/Nod m20050718_0076.fit HR 5340 2005-07-18 07:57:18 07:57:40 1.381 18.4 1.0 24 Chop/Nod m20050718_0077.fit HR 5340 2005-07-18 07:57:53 07:58:15 1.384 18.4 1.0 24 Chop/Nod m20050718_0078.fit HR 5340 2005-07-18 07:59:07 07:59:35 1.391 10.4 1.0 12 Chop/Nod Optical depth at 225 GHz measured at the Caltech Submillimeter Observatory (CSO) on Mauna Kea as function of time (UT) on 2005 July 18. (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) 05:04 0.08 05:15 0.068 05:25 0.08 05:34 0.074 05:45 0.084 05:55 0.073 06:04 0.073 06:15 0.079 06:25 0.072 06:34 0.066 06:45 0.07 06:55 0.067 07:04 0.07 07:15 0.067 07:25 0.063 07:34 0.073 07:45 0.07 07:55 0.069 08:04 0.065