Telescope: NASA IRTF, Mauna Kea Instrument: MIRSI Date: 2005 July 08 UT Conditions: No clouds, humidity 33-47%, 1-2" seeing, winds NE 28-39 mph File Object UT Date UT Time Airmass Bandpass Itime Frame Time Mode Start Finish (micron) (sec) (msec) m20050708_0007.fit HR 5340 2005-07-08 02:27:46 02:28:02 1.367 11.6 1.0 24 Chop/Nod m20050708_0008.fit HR 5340 2005-07-08 02:28:44 02:29:00 1.362 11.6 1.0 24 Chop/Nod m20050708_0009.fit HR 5340 2005-07-08 02:29:36 02:29:52 1.358 11.6 1.0 24 Chop/Nod m20050708_0010.fit HR 5340 2005-07-08 02:30:40 02:30:56 1.352 12.5 1.0 24 Chop/Nod m20050708_0011.fit HR 5340 2005-07-08 02:31:14 02:31:30 1.350 12.5 1.0 24 Chop/Nod m20050708_0012.fit HR 5340 2005-07-08 02:32:38 02:32:54 1.343 18.4 1.0 24 Chop/Nod m20050708_0013.fit HR 5340 2005-07-08 02:33:09 02:33:25 1.340 18.4 1.0 24 Chop/Nod m20050708_0014.fit HR 5340 2005-07-08 02:34:38 02:34:54 1.333 8.7 1.0 24 Chop/Nod m20050708_0015.fit HR 5340 2005-07-08 02:35:12 02:35:28 1.330 8.7 1.0 24 Chop/Nod m20050708_0016.fit HR 5340 2005-07-08 02:36:54 02:37:10 1.322 9.8 1.0 24 Chop/Nod m20050708_0017.fit HR 5340 2005-07-08 02:37:28 02:37:44 1.320 9.8 1.0 24 Chop/Nod m20050708_0018.fit HR 5340 2005-07-08 02:38:42 02:39:06 1.314 10.4 1.0 12 Chop/Nod m20050708_0019.fit HR 5340 2005-07-08 02:39:19 02:39:43 1.311 10.4 1.0 12 Chop/Nod m20050708_0020.fit HR 5340 2005-07-08 02:40:12 02:40:36 1.307 10.4 1.0 12 Chop/Nod m20050708_0022.fit 9P/Tempel 1 2005-07-08 02:46:47 02:48:47 1.426 10.4 10.0 24 Chop/Nod m20050708_0023.fit 9P/Tempel 1 2005-07-08 02:49:42 02:51:42 1.413 10.4 10.0 24 Chop/Nod m20050708_0024.fit 9P/Tempel 1 2005-07-08 02:53:08 02:56:06 1.398 11.6 20.0 60 Chop/Nod m20050708_0025.fit 9P/Tempel 1 2005-07-08 02:56:29 02:59:27 1.384 11.6 20.0 60 Chop/Nod m20050708_0026.fit 9P/Tempel 1 2005-07-08 02:59:56 03:02:54 1.370 11.6 20.0 60 Chop/Nod m20050708_0027.fit 9P/Tempel 1 2005-07-08 03:03:12 03:06:10 1.358 11.6 20.0 60 Chop/Nod m20050708_0028.fit 9P/Tempel 1 2005-07-08 03:06:54 03:09:52 1.345 12.5 20.0 60 Chop/Nod m20050708_0029.fit 9P/Tempel 1 2005-07-08 03:10:10 03:13:08 1.334 12.5 20.0 60 Chop/Nod m20050708_0030.fit 9P/Tempel 1 2005-07-08 03:13:33 03:16:31 1.323 12.5 20.0 60 Chop/Nod m20050708_0031.fit 9P/Tempel 1 2005-07-08 03:17:21 03:20:19 1.311 18.4 20.0 60 Chop/Nod m20050708_0033.fit 9P/Tempel 1 2005-07-08 03:28:05 03:31:59 1.281 8.7 20.0 24 Chop/Nod m20050708_0034.fit 9P/Tempel 1 2005-07-08 03:33:52 03:39:44 1.265 8.7 40.0 60 Chop/Nod m20050708_0037.fit HR 5340 2005-07-08 03:48:42 03:48:58 1.234 8.7 1.0 24 Chop/Nod m20050708_0038.fit HR 5340 2005-07-08 03:49:44 03:49:60 1.232 8.7 1.0 24 Chop/Nod m20050708_0039.fit HR 5340 2005-07-08 03:51:57 03:52:13 1.228 11.6 1.0 24 Chop/Nod m20050708_0040.fit HR 5340 2005-07-08 03:52:38 03:52:54 1.227 11.6 1.0 24 Chop/Nod m20050708_0041.fit HR 5340 2005-07-08 03:53:41 03:53:57 1.225 12.5 1.0 24 Chop/Nod m20050708_0042.fit HR 5340 2005-07-08 03:54:15 03:54:31 1.224 12.5 1.0 24 Chop/Nod m20050708_0043.fit HR 5340 2005-07-08 03:55:22 03:55:38 1.222 18.4 1.0 24 Chop/Nod m20050708_0044.fit HR 5340 2005-07-08 03:55:55 03:56:11 1.221 18.4 1.0 24 Chop/Nod m20050708_0045.fit HR 5340 2005-07-08 03:57:07 03:57:31 1.219 10.4 1.0 12 Chop/Nod m20050708_0046.fit HR 5340 2005-07-08 03:57:45 03:58:09 1.218 10.4 1.0 12 Chop/Nod m20050708_0047.fit 9P/Tempel 1 2005-07-08 04:01:18 04:03:18 1.211 10.4 10.0 24 Chop/Nod m20050708_0048.fit 9P/Tempel 1 2005-07-08 04:03:41 04:05:41 1.208 10.4 10.0 24 Chop/Nod m20050708_0049.fit 9P/Tempel 1 2005-07-08 04:08:50 04:16:32 1.200 10.4 40.0 24 Chop/Nod m20050708_0050.fit 9P/Tempel 1 2005-07-08 04:15:21 04:19:15 1.193 10.4 20.0 24 Chop/Nod m20050708_0051.fit 9P/Tempel 1 2005-07-08 04:19:32 04:23:26 1.188 10.4 20.0 24 Chop/Nod m20050708_0054.fit 9P/Tempel 1 2005-07-08 04:31:38 04:34:36 1.177 11.6 20.0 60 Chop/Nod m20050708_0055.fit 9P/Tempel 1 2005-07-08 04:35:18 04:38:16 1.174 11.6 20.0 60 Chop/Nod m20050708_0056.fit 9P/Tempel 1 2005-07-08 04:40:13 04:43:11 1.171 8.7 20.0 60 Chop/Nod m20050708_0057.fit 9P/Tempel 1 2005-07-08 04:47:02 04:50:00 1.168 8.7 20.0 60 Chop/Nod m20050708_0058.fit 9P/Tempel 1 2005-07-08 04:50:39 04:53:37 1.167 8.7 20.0 60 Chop/Nod m20050708_0059.fit 9P/Tempel 1 2005-07-08 04:54:01 04:56:59 1.166 8.7 20.0 60 Chop/Nod m20050708_0060.fit 9P/Tempel 1 2005-07-08 04:57:27 05:00:25 1.166 8.7 20.0 60 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 08. (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) 02:24 0.114 02:34 0.12 02:43 0.114 02:54 0.107 03:04 0.104 03:13 0.103 03:24 0.103 03:34 0.102 03:43 0.107 03:54 0.108 04:04 0.11 04:13 0.111 04:24 0.102 04:34 0.105 04:43 0.103 04:54 0.11