Telescope: NASA IRTF, Mauna Kea Instrument: SpeX (Spectrograph) Date: 2005 June 24 UT Conditions: No clouds, humidity 21-24%, 0.6" seeing, winds SE 9-13 mph File Object UT Date UT Time Airmass Itime Coadds PosAngle Slit Grating GuideDog Start Finish (sec) (deg) images? b20050624_0001_a.fit HR 4689 2005-06-24 06:05:33 06:05:44 1.164 2.00 3 43.93 0.5x15 ShortXD N b20050624_0002_b.fit HR 4689 2005-06-24 06:05:47 06:05:58 1.164 2.00 3 43.93 0.5x15 ShortXD N b20050624_0003_b.fit HR 4689 2005-06-24 06:05:59 06:06:10 1.165 2.00 3 43.93 0.5x15 ShortXD N b20050624_0004_a.fit HR 4689 2005-06-24 06:06:12 06:06:23 1.165 2.00 3 43.93 0.5x15 ShortXD N b20050624_0005_a.fit HR 4689 2005-06-24 06:06:23 06:06:35 1.166 2.00 3 43.93 0.5x15 ShortXD N b20050624_0006_b.fit HR 4689 2005-06-24 06:06:38 06:06:49 1.166 2.00 3 43.93 0.5x15 ShortXD N b20050624_0007_b.fit HR 4689 2005-06-24 06:06:49 06:07:00 1.167 2.00 3 43.93 0.5x15 ShortXD N b20050624_0008_a.fit HR 4689 2005-06-24 06:07:02 06:07:13 1.167 2.00 3 43.93 0.5x15 ShortXD N b20050624_0009_a.fit HR 4689 2005-06-24 06:07:14 06:07:25 1.168 2.00 3 43.93 0.5x15 ShortXD N b20050624_0010_b.fit HR 4689 2005-06-24 06:07:27 06:07:38 1.168 2.00 3 43.93 0.5x15 ShortXD N b20050624_0011_flat.fit QTH Lamp 2005-06-24 06:08:59 06:09:07 1.172 1.00 5 43.93 0.5x15 ShortXD N b20050624_0012_flat.fit QTH Lamp 2005-06-24 06:09:08 06:09:16 1.172 1.00 5 43.93 0.5x15 ShortXD N b20050624_0013_flat.fit QTH Lamp 2005-06-24 06:09:16 06:09:24 1.172 1.00 5 43.93 0.5x15 ShortXD N b20050624_0014_flat.fit QTH Lamp 2005-06-24 06:09:25 06:09:33 1.172 1.00 5 43.93 0.5x15 ShortXD N b20050624_0015_flat.fit QTH Lamp 2005-06-24 06:09:33 06:09:41 1.173 1.00 5 43.93 0.5x15 ShortXD N b20050624_0016_arc_a.fit Argon lamp 2005-06-24 06:10:02 06:10:18 1.174 1.00 10 43.93 0.5x15 ShortXD N b20050624_0019_a.fit 9P/Tempel 1 2005-06-24 06:52:52 06:55:09 1.185 120.00 1 27.56 0.5x15 ShortXD N b20050624_0020_b.fit 9P/Tempel 1 2005-06-24 06:55:11 06:57:28 1.190 120.00 1 27.56 0.5x15 ShortXD N b20050624_0021_a.fit 9P/Tempel 1 2005-06-24 07:09:30 07:11:47 1.223 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0022_b.fit 9P/Tempel 1 2005-06-24 07:11:50 07:14:06 1.229 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0023_b.fit 9P/Tempel 1 2005-06-24 07:14:07 07:16:24 1.235 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0024_a.fit 9P/Tempel 1 2005-06-24 07:16:26 07:18:43 1.241 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0025_a.fit 9P/Tempel 1 2005-06-24 07:18:44 07:21:00 1.248 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0026_b.fit 9P/Tempel 1 2005-06-24 07:21:03 07:23:20 1.255 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0027_b.fit 9P/Tempel 1 2005-06-24 07:23:20 07:25:37 1.262 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0028_a.fit 9P/Tempel 1 2005-06-24 07:25:40 07:27:57 1.269 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0029_a.fit 9P/Tempel 1 2005-06-24 07:27:58 07:30:15 1.276 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0030_b.fit 9P/Tempel 1 2005-06-24 07:30:17 07:32:34 1.284 120.00 1 27.56 0.5x15 LowRes15 N b20050624_0031_flat.fit Inc Lamp 2005-06-24 07:33:18 07:33:43 1.287 1.05 12 27.56 0.5x15 LowRes15 N b20050624_0032_flat.fit Inc Lamp 2005-06-24 07:33:44 07:34:09 1.289 1.05 12 27.56 0.5x15 LowRes15 N b20050624_0033_flat.fit Inc Lamp 2005-06-24 07:34:10 07:34:35 1.290 1.05 12 27.56 0.5x15 LowRes15 N b20050624_0034_flat.fit Inc Lamp 2005-06-24 07:34:36 07:35:01 1.292 1.05 12 27.56 0.5x15 LowRes15 N b20050624_0035_flat.fit Inc Lamp 2005-06-24 07:35:01 07:35:27 1.293 1.05 12 27.56 0.5x15 LowRes15 N b20050624_0036_arc_a.fit Argon lamp 2005-06-24 07:35:47 07:35:54 1.295 0.18 10 27.56 0.5x15 LowRes15 N b20050624_0037_a.fit HD 122749 2005-06-24 07:53:28 07:53:57 1.316 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0038_b.fit HD 122749 2005-06-24 07:54:00 07:54:29 1.318 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0039_b.fit HD 122749 2005-06-24 07:54:29 07:54:59 1.319 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0040_a.fit HD 122749 2005-06-24 07:55:01 07:55:30 1.321 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0041_a.fit HD 122749 2005-06-24 07:55:31 07:56:00 1.322 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0042_b.fit HD 122749 2005-06-24 07:56:03 07:56:32 1.324 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0043_b.fit HD 122749 2005-06-24 07:56:33 07:57:02 1.325 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0044_a.fit HD 122749 2005-06-24 07:57:06 07:57:35 1.327 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0045_a.fit HD 122749 2005-06-24 07:57:35 07:58:05 1.329 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0046_b.fit HD 122749 2005-06-24 07:58:08 07:58:37 1.330 5.00 3 27.56 0.5x15 LowRes15 N b20050624_0047_a.fit HD 122749 2005-06-24 08:04:59 08:05:10 1.351 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0048_b.fit HD 122749 2005-06-24 08:05:12 08:05:23 1.352 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0049_b.fit HD 122749 2005-06-24 08:05:23 08:05:34 1.352 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0050_a.fit HD 122749 2005-06-24 08:05:37 08:05:48 1.353 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0051_a.fit HD 122749 2005-06-24 08:05:48 08:05:59 1.354 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0052_b.fit HD 122749 2005-06-24 08:06:02 08:06:13 1.355 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0053_b.fit HD 122749 2005-06-24 08:06:14 08:06:25 1.355 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0054_a.fit HD 122749 2005-06-24 08:06:27 08:06:38 1.356 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0055_a.fit HD 122749 2005-06-24 08:06:38 08:06:49 1.357 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0056_b.fit HD 122749 2005-06-24 08:06:53 08:07:04 1.358 2.00 3 27.56 3.0x15 LowRes15 N b20050624_0057_flat.fit Inc Lamp 2005-06-24 08:07:35 08:08:21 1.361 0.18 66 27.56 3.0x15 LowRes15 N b20050624_0058_flat.fit Inc Lamp 2005-06-24 08:08:00 08:08:46 1.362 0.18 66 27.56 3.0x15 LowRes15 N b20050624_0059_flat.fit Inc Lamp 2005-06-24 08:08:24 08:09:10 1.364 0.18 66 27.56 3.0x15 LowRes15 N b20050624_0060_flat.fit Inc Lamp 2005-06-24 08:08:49 08:09:35 1.365 0.18 66 27.56 3.0x15 LowRes15 N b20050624_0061_flat.fit Inc Lamp 2005-06-24 08:09:13 08:09:59 1.366 0.18 66 27.56 3.0x15 LowRes15 N b20050624_0062_arc_a.fit Argon lamp 2005-06-24 08:09:47 08:09:49 1.367 0.18 1 27.56 3.0x15 LowRes15 N b20050624_0063_flat.fit Inc Lamp 2005-06-24 08:10:33 08:10:59 1.371 1.05 12 27.56 3.0x15 LowRes15 N b20050624_0064_flat.fit Inc Lamp 2005-06-24 08:11:00 08:11:26 1.373 1.05 12 27.56 3.0x15 LowRes15 N b20050624_0065_flat.fit Inc Lamp 2005-06-24 08:11:26 08:11:52 1.374 1.05 12 27.56 3.0x15 LowRes15 N b20050624_0066_flat.fit Inc Lamp 2005-06-24 08:11:52 08:12:17 1.376 1.05 12 27.56 3.0x15 LowRes15 N b20050624_0067_flat.fit Inc Lamp 2005-06-24 08:12:18 08:12:43 1.377 1.05 12 27.56 3.0x15 LowRes15 N b20050624_0068_arc_a.fit Argon lamp 2005-06-24 08:13:03 08:13:11 1.379 0.18 10 27.56 3.0x15 LowRes15 N Optical depth at 225 GHz measured at the Caltech Submillimeter Observatory (CSO) on Mauna Kea as function of time (UT) on 2005 Jun 24. (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) 05:54 0.222 06:04 0.212 06:13 0.211 06:24 0.134 06:34 0.204 06:43 0.193 06:54 0.186 07:04 0.181 07:13 0.194 07:24 0.19 07:34 0.179 07:43 0.187 07:54 0.184 08:04 0.178 08:13 0.175