Note 1: Finding charts are 20arcmin on a side (matched for the WIYN-0.9m+S2KB), with North being up and East being to the Left.
Note 2: If the line says "check these exptimes" use about 1/2 of the listed time (all of it for u-band), especially if you have good seeing.
Note 3: Shorter exposure times are available for these fields which also include several brighter u'g'r'i'z' standard stars. The shorter exposures come from the Southern u'g'r'i'z' Standard Stars Program and are optimized for the CTIO-0.9m and SDSS filter set, but should be a good approximation for the CTIO-1m and DECam 2kx2k chip.
Note 4: The home page for the SDSS ugriz standards.
Note 5: The AJ paper of the ugriz system.
Note 5: As time allows, shoot a cycle 6-7X fainter in each field to look for fainter standards candidates.
This links to my original observing stats for the USNO observations. Original Notes
Check these exptimes. If defocus is required, do not use them on the WIYN for standards. Can still shoot the field for other potentials.
Field RA(2000) DEC(2000) ExpTime (seconds) These are the USNO 1m exposure times for the initial standards setup, tweaked for CTIO experience.
r (g-r) u g r i z The CTIO exptimes (above) go deeper for fainter standards.
----------- -------- --------- ------ ----- --- --- --- --- ---
Hiltner_31 00:28:11 +64:07:52 10.996 0.587 30 5 3 3 3 Finding Chart Airmass Table
G158-100 00:33:54 -12:07:57 14.691 0.510 480 80 40 40 80 Finding Chart Airmass Table Check these exptimes
BD+71o0031 00:43:44 +72:10:43 10.091 0.260 20 4 4 5 10 Finding Chart Airmass Table Check these exptimes
SA_92_Z 00:55:03 +00:44:35 54 9 9 9 9 Finding Chart Airmass Table Check these exptimes
92-342 00:55:10 +00:43:13 11.527 0.257
92-263 00:55:39 +00:36:20 11.467 0.801
SA_92_Y 00:56:23 +01:07:51 40 10 10 10 10 Finding Chart Airmass Table Check these exptimes
92-502 00:56:08 +01:04:25 11.712 0.289
SA_92_X 00:56:40 +00:44:39 90 10 10 10 10 Finding Chart Airmass Table
92-282 00:56:47 +00:38:31 12.936 0.136
92-288 00:57:17 +00:36:49 11.350 0.661
SA_93_Z 01:55:02 +00:50:24 60 9 7 7 8 Finding Chart Airmass Table
93-317 01:54:38 +00:43:00 11.437 0.317
93-333 01:55:05 +00:45:42 11.760 0.633
93-424 01:55:26 +00:56:42 11.300 0.823
Hiltner_190 01:58:24 +61:53:43 10.883 0.640 36 6 6 6 6 Finding Chart Airmass Table Check these exptimes
LHS_0014 02:12:21 +03:34:32 9.481 1.282 60 4 3 3 3 Finding Chart Airmass Table Defocus at r,i,z Check these exptimes
Hiltner_233 02:12:30 +59:54:04 10.659 0.834 42 6 5 5 6 Finding Chart Airmass Table Check these exptimes
Feige_22 02:30:17 +05:15:51 13.024 -0.333 30 8 8 15 50 Finding Chart Airmass Table
SA_94_Z 02:57:33 +00:12:36 60 3 3 3 4 Finding Chart Airmass Table
94-242 02:57:21 +00:18:39 11.712 0.106
94-251 02:57:47 +00:16:03 10.803 0.979
SA_94_Y 02:58:13 +01:10:54 250 15 7 7 10 Finding Chart Airmass Table Check these exptimes
94-702 02:58:13 +01:10:54 11.116 1.159
Ross_374 03:27:00 +23:46:36 10.646 0.385 20 3 3 3 4 Finding Chart Airmass Table Good field for poor seeing nights. Bright.
Ross_34 03:28:53 +37:22:57 10.530 1.229 90 10 5 5 5 Finding Chart Airmass Table Check these exptimes
SA_95_Z 03:53:17 +00:07:23 15 3 3 6 12 Finding Chart Airmass Table Check these exptimes Two cycles needed.
240 40 30 25 30
95-96 03:52:54.18 +00:00:18.7 10.071 -0.070
95-190 03:53:13.24 +00:16:22.8 12.593 0.126
95-193 03:53:20.59 +00:16:34.7 13.844 1.097
Hiltner_404 03:53:59 +53:12:57 10.815 0.656 150 15 10 10 12 Finding Chart Airmass Table Check these exptimes
SA_95_Y 03:55:20 +00:03:12 75 5 3 3 4 Finding Chart Airmass Table 95-142 and -149 should also be in SA_95_X field.
95-218 03:54:50 +00:10:09 11.901 0.500
95-132 03:54:52 +00:05:22 11.994 0.252
95-142 03:55:09 +00:01:21 12.775 0.422
95-149 03:55:44 +00:07:03 10.375 1.326
SA_95_X 03:55:44 +00:07:03 70 5 3 3 5 Finding Chart Airmass Table Check these exptimes 95-142 and -149 should also be in SA_95_Y field.
95-142 03:55:09 +00:01:21 12.775 0.422
95-149 03:55:44 +00:07:03 10.375 1.326
95-236 03:56:13 +00:08:47 11.287 0.539
BD+21o0607 04:14:36 +22:21:04 9.114 0.281 15 3 3 3 3 Finding Chart Airmass Table Check these exptimes TOO Bright unless 1x1 binning
BD-21o0910 04:33:16 -21:08:07 9.608 0.474 8 2 2 2 3 Finding Chart Airmass Table Watch shutter illumination errors and saturation. 1X1 binning should work
SA_96_Z 04:51:42 -00:16:09 30 3 3 5 8 Finding Chart Airmass Table Set focus +100 units Set 6 arcmin S to avoid bright star.
96-36 04:51:42 -00:10:09 10.614 0.027
SA_96_Y 04:52:35 +00:22:30 150 15 8 8 10 Finding Chart Airmass Table Check these exptimes
96-737 04:52:35 +00:22:30 11.275 1.099
SA_96_X 04:53:09 -00:10:45 40 3 3 3 4 Finding Chart Airmass Table
96-83 04:52:59 -00:14:41 11.793 -0.054
96-235 04:53:19 -00:05:02 10.820 0.814
Ross_49 05:44:57 +09:14:32 11.163 0.467 60 10 10 10 10 Finding Chart Airmass Table Check these exptimes Close companion? Lots of dust in area.
SA_97_Z 05:56:40 -00:03:30 60 8 5 5 5 Finding Chart Airmass Table Set E and S to avoid really bright star.
97-249 05:57:08 +00:01:12 11.567 0.451
SA_97_Y 05:57:55 +00:14:05 80 5 3 3 5 Finding Chart Airmass Table Check these exptimes SA_97-284, -288 also in 97_X field.
97-345 05:57:33 +00:21:16 11.005 1.424
97-351 05:57:37 +00:13:44 9.813 0.008
97-284 05:58:25 +00:05:14 10.299 1.155
97-288 05:58:30 +00:06:41 10.718 0.401
SA_97_X 05:58:25 -00:01:00 150 6 3 3 3 Finding Chart Airmass Table Defocus -100 for good seeing SA_97-284, -288 also in 97_Y field.
97-75 05:57:55 -00:09:29 10.783 1.618
97-284 05:58:25 +00:05:14 10.299 1.155
97-288 05:58:30 +00:06:41 10.718 0.401
Hiltner_566 06:32:10 +03:34:44 10.787 0.673 30 3 3 3 4 Finding Chart Airmass Table Defocus -100 units for good seeing
LHS_1858 06:37:11 +17:33:53 9.007 1.374 75 5 3 3 3 Finding Chart Airmass Table Check these exptimes
SA_98_Z 06:52:03 -00:18:18 20 5 3 4 7 Finding Chart Airmass Table Check these exptimes Probably need 2 cycles.
98-978 06:51:34 -00:11:32 10.414 0.407
98-185 06:52:02 -00:27:22 10.610 -0.037
98-193 06:52:03 -00:27:18 9.676 0.903
98-653 06:52:05 -00:18:18 9.655 -0.212
98-685 06:52:18 -00:20:20 11.857 0.287
Ru_149_field 07:24:14 -00:31:41 110 8 7 12 22 Finding Chart Airmass Table
Ru_149F 07:24:14 -00:31:38 13.119 0.867
Ru_149D 07:24:15 -00:32:48 11.601 -0.213
Ru_149B 07:24:18 -00:33:05 12.474 0.460
LHS_0033 07:27:24 +05:13:33 9.286 1.331 60 6 3 3 3 Finding Chart Airmass Table Check these exptimes
Ru_152_field 07:29:58 -02:06:38 13.188 -0.355 150 25 30 35 40 Finding Chart Airmass Table Check these exptimes
SA_99_Z 07:56:00 -00:18:47 12 3 3 4 6 Finding Chart Airmass Table Check these exptimes Probably need 2 cycles.
99-438 07:55:54 -00:16:49 9.569 -0.348
99-447 07:56:07 -00:20:42 9.572 -0.287
BD+75o0325 08:10:50 +74:57:58 9.786 -0.514 12 3 3 5 8 Finding Chart Airmass Table Check these exptimes
BD+8o2015 08:15:42 +07:37:06 10.194 0.497 30 3 3 3 3 Finding Chart Airmass Table Defocus by 100 units
BD+54o1216 08:19:33 +54:05:10 9.586 0.300 20 4 4 4 4 Finding Chart Airmass Table Set 10 sec east to avoid bright star. Check these exptimes
GCRV_5757 08:44:05 +36:14:44 10.803 0.403 30 3 3 3 5 Finding Chart Airmass Table Defocus by 100 units
BD+25o1981 08:44:25 +24:47:48 9.270 0.144 16 4 4 6 8 Finding Chart Airmass Table Defocus at u,g,r,i,z Check these exptimes
SA_100_Z 08:52:34 -00:39:49 16 4 3 4 6 Finding Chart Airmass Table Check these exptimes
100-241 08:52:34 -00:39:49 10.204 -0.068
SA_100_Y 08:53:46 -00:34:14 75 3 3 3 4 Finding Chart Airmass Table Defocus slightly for -394 in good seeing
100-280 08:53:35 -00:36:41 11.689 0.308
100-394 08:53:54 -00:32:22 10.932 1.056 -bright
GCRV_5951 09:05:17 +38:47:55 11.474 0.346 30 3 3 3 4 Finding Chart Airmass Table
PG0918+029D 09:21:34 +02:47:05 11.937 0.817 110 8 6 8 16 Finding Chart Airmass Table
BD+09o2190 09:29:16 +08:38:01 11.049 0.238 30 3 3 3 3 Finding Chart Airmass Table
BD-12o2918 09:31:19 -13:29:19 9.476 1.326 120 8 3 3 3 Finding Chart Airmass Table Check these exptimes
Ross_889 09:40:43 +01:00:29 10.380 0.220 16 4 4 4 4 Finding Chart Airmass Table Check these exptimes
BD+44o1910 09:49:36 +44:18:00 10.842 0.272 40 10 10 15 15 Finding Chart Airmass Table Check these exptimes
SA_101_Z 09:55:15 -00:23:02 100 8 5 5 10 Finding Chart Airmass Table
101-315 09:54:51 -00:27:31 10.894 0.894
101-316 09:54:52 -00:18:34 11.438 0.309
SA_101_Y 09:55:55 -00:26:56 180 40 30 20 20 Finding Chart Airmass Table Check these exptimes
101-262 09:56:08 -00:29:36 14.078 0.564
101-268 09:56:19 -00:31:43 13.733 1.371
101-270 09:56:27 -00:35:31 13.584 0.376
SA_101_X 09:57:25 -00:23:10 40 15 15 15 20 Finding Chart Airmass Table Check these exptimes
101-281 09:57:05 -00:31:26 11.336 0.603
SA_101_W 09:57:52 -00:47:36 80 20 20 30 30 Finding Chart Airmass Table Check these exptimes
101-207 09:57:52 -00:47:36 12.290 0.347
G162-66 10:33:43 -11:41:39 13.227 -0.387 30 10 10 15 40 Finding Chart Airmass Table
Feige_34 10:39:37 +43:06:09 11.423 -0.508 10 3 3 6 15 Finding Chart Airmass Table
BD+29o2091 10:47:23 +28:23:56 10.123 0.366 16 4 4 4 4 Finding Chart Airmass Table Check these exptimes
PG1047+003A 10:50:06 -00:01:11 13.303 0.519 180 30 20 25 35 Finding Chart Airmass Table
Ross_106 10:50:29 +56:22:31 12.413 0.434 80 15 15 15 20 Finding Chart Airmass Table Set 4 arcmin south to avoid bright star. Check these exptimes
SA_102_Z 10:55:04 -00:48:19 50 5 3 3 4 Finding Chart Airmass Table Defocus at i, z Check these exptimes
102-620 10:55:04 -00:48:19 9.665 0.932
G163_Field 11:08:00 -05:09:26 100 20 20 15 25 Finding Chart Airmass Table Check these exptimes
G163-50 11:08:00 -05:09:26 13.266 -0.277
G163-51 11:08:07 -05:13:47 11.960 1.315
Wolf_365 11:11:00 +06:25:11 11.135 0.560 60 8 8 8 8 Finding Chart Airmass Table Check these exptimes
GCRV_7017 11:32:23 +76:39:18 11.326 0.517 40 8 8 8 8 Finding Chart Airmass Table Check these exptimes
BD-21o3420 11:55:28 -22:23:13 10.021 0.322 24 6 6 6 6 Finding Chart Airmass Table Check these exptimes
SA_103_Z 11:56:45 -00:26:00 25 5 5 5 5 Finding Chart Airmass Table Check these exptimes
103-626 11:56:46 -00:23:15 11.753 0.246
103-526 11:56:54 -00:30:14 10.575 0.826
Ross_453 12:10:56 +00:23:54 10.971 0.298 18 3 3 3 4 Finding Chart Airmass Table
Wolf_1447 12:34:24 +15:16:00 11.852 0.307 60 10 10 15 15 Finding Chart Airmass Table
Feige_66 12:37:22 +25:04:00 10.747 -0.476 12 3 3 3 12 Finding Chart Airmass Table Defocus -100 for good seeing
SA_104_Z 12:42:12 -00:33:12 90 15 13 10 13 Finding Chart Airmass Table Check these exptimes, lots of stds mostly fainter.
104-428 12:41:41 -00:26:26 12.330 0.763
SA_104_Y 12:44:55 -00:23:51 120 5 3 3 5 Finding Chart Airmass Table Several candidates mostly fainter; NICE galaxy.
104-598 12:45:17 -00:16:40 11.057 0.985
Ross_484 13:18:57 -03:04:18 10.378 0.855 30 5 3 3 3 Finding Chart Airmass Table Defocus at u,g,r,i,z? Close companion. Check these exptimes
LTT_5137 13:20:24 -03:01:42 11.190 0.455 60 6 6 6 6 Finding Chart Airmass Table Check these exptimes
GCRV_7951 13:21:53 +74:12:33 11.488 0.341 25 4 4 4 8 Finding Chart Airmass Table
PG1323-086D 13:26:05 -08:50:36 11.928 0.397 150 20 18 25 30 Finding Chart Airmass Table
G14-55 13:28:21 -02:21:37 10.633 1.325 100 10 5 3 3 Finding Chart Airmass Table Defocus at i,z. Check these exptimes
BD+30o2428B 13:37:14 +30:05:14 10.239 0.668 30 3 3 3 4 Finding Chart Airmass Table Awfully close to the A component, might need to drop it.
SA_105_Z 13:40:02 -00:02:19 42 7 7 7 7 Finding Chart Airmass Table Check these exptimes
105-815 13:40:02 -00:02:19 11.366 0.232
BD+02o2711 13:42:19 +01:30:19 10.548 -0.362 30 3 5 6 9 Finding Chart Airmass Table Check exptimes
HD_121968 13:58:51 -02:54:52 10.425 -0.370 15 3 3 6 12 Finding Chart Airmass Table Defocus at u,g,r Check exptimes
Ross_838 14:01:44 +08:55:17 11.327 0.573 75 4 4 4 7 Finding Chart Airmass Table Bright star in field.
BD+26o2606 14:49:02 +25:42:09 9.604 0.287 12 3 3 3 3 Finding Chart Airmass Table Defocus at u,g,r,i,z Check exptimes
GCRV_8758 15:07:41 +32:26:37 10.954 0.492 90 7 4 4 7 Finding Chart Airmass Table Set 2 arc-min north to avoid bright star.
G15-24 15:30:42 +08:23:40 11.277 0.412 60 10 10 10 10 Finding Chart Airmass Table Check exptimes
PG1528+062B 15:30:48 +06:01:05 11.828 0.419 90 6 5 5 9 Finding Chart Airmass Table Will need a second exposure cycle to get the WD and star-A at 1%.
SA_107_Z 15:38:33 +00:14:19 90 15 15 15 15 Finding Chart Airmass Table Check these exptimes
107-1006 15:38:33 +00:14:19 11.474 0.578
SA_107_Y 15:38:46 -00:37:39 90 15 15 15 15 Finding Chart Airmass Table Check these exptimes Three faint std candidates, so go longer on exposures?
107-351 15:38:46 -00:32:07 12.175 0.396
BD+33o2642 15:52:00 +32:56:54 10.979 -0.332 24 6 6 9 15 Finding Chart Airmass Table Check exptimes
Ross_530 16:19:52 +22:38:20 11.319 0.558 75 4 4 4 7 Finding Chart Airmass Table
GCRV_9483 16:28:17 +44:40:38 11.104 0.527 75 4 3 3 6 Finding Chart Airmass Table Set 3 minutes North of nominal to avoid a bright red star.
PG1633+099 16:35:32 +09:46:17 xx.xxx x.xxx 240 25 18 25 40 Finding Chart Airmass Table
SA_108_Z 16:37:24 -00:35:52 90 6 4 4 7 Finding Chart Airmass Table One really red, one really blue. Set 2 arcmin S to avoid bright star.
108-475 16:37:01 -00:34:39 10.832 1.130
108-551 16:37:48 -00:33:05 10.747 -0.032
Wolf_629 16:55:26 -08:19:13 11.129 1.413 120 20 8 4 5 Finding Chart Airmass Table Check exptimes Bright stars in field.
BD+18o3407 17:35:20 +18:53:01 9.765 0.628 24 3 3 3 3 Finding Chart Airmass Table TOO BRIGHT! Close Companion -DO NOT USE!
BD+2o3375 17:39:46 +02:25:00 9.809 0.321 12 3 3 3 3 Finding Chart Airmass Table Defocus at u,g,r,i,z Check exptimes
SA_109_Z 17:44:36 -00:22:45 90 6 5 4 5 Finding Chart Airmass Table -199 is bright at i,z.
109-71 17:44:07 -00:24:58 11.475 0.130
109-381 17:44:12 -00:20:33 11.514 0.547
SA_109_Y 17:45:12 -00:22:45 40 10 10 10 10 Finding Chart Airmass Table -231 requires defocus in all filters. Check exptimes 109-199 should be in both SA_109 fields.
109-231 17:45:20 -00:25:52 8.825 1.218
109-537 17:45:42 -00:21:35 10.201 0.456
Hiltner_733 18:17:23 -11:44:58 10.939 0.827 60 8 6 8 8 Finding Chart Airmass Table Check exptimes LOTS of nebulosity around.
Ross_711 18:35:19 +28:41:55 11.295 0.282 40 4 4 4 10 Finding Chart Airmass Table
SA_110_Z 18:41:20 +00:06:31 100 15 15 20 20 Finding Chart Airmass Table Check exptimes Might require two exposure cycles. Lots of other candidates.
110-232 18:40:52 +00:01:55 12.287 0.552
110-340 18:41:28 +00:15:23 10.010 0.094
SA_110_Y 18:43:18 +00:04:44 300 30 18 25 30 Finding Chart Airmass Table
110-361 18:42:45 +00:07:42 12.264 0.438
SA_110_X 18:43:22 +00:25:53 90 5 4 4 6 Finding Chart Airmass Table Might use two exposure cycles. Lots of other candidates.
110-499 18:43:08 +00:28:01 11.399 0.827
110-503 18:43:12 +00:29:43 11.625 0.460
GJ_745 19:07:06 +20:53:00 120 10 5 3 3 Finding Chart Airmass Table Might require defocus in i,z filters. Check exptimes
GJ_745A 19:07:06 +20:53:17 10.159 1.408
GJ_745B 19:07:13 +20:52:37 10.151 1.401
BD+35o3659 19:31:09 +36:09:10 10.089 0.333 20 3 3 3 4 Finding Chart Airmass Table Bad seeing nights or unbinned.
SA_111_Z 19:37:17 +00:11:11 60 10 3 3 3 Finding Chart Airmass Table Defocus at i,z Check exptimes
111-775 19:37:16 +00:12:05 10.106 1.491
SA_111_Y 19:37:47 +00:28:16 150 7 3 3 3 Finding Chart Airmass Table Really bright at r,i,z - might only be useful for bad seeing nights.
SA_111-1925 19:37:29 +00:25:03 12.345 0.200
Wolf_1346 20:34:22 +25:03:50 11.753 -0.351 20 4 4 10 15 Finding Chart Airmass Table
SA_112_Z 20:42:32 +00:12:31 75 8 8 8 10 Finding Chart Airmass Table
112-223 20:42:15 +00:09:00 11.336 0.270
112-250 20:42:26 +00:07:42 11.962 0.352
112-805 20:42:47 +00:16:08 12.174 -0.087
112-822 20:42:55 +00:15:02 11.227 0.801
BD+62o1916 21:15:06 +62:50:28 9.332 0.540 20 4 4 3 3 Finding Chart Airmass Table Defocus at u,g,r,i,z Check exptimes
SA_113_Z 21:41:14 +00:26:00 150 15 10 8 10 Finding Chart Airmass Table
113-339 21:40:56 +00:27:58 12.103 0.389
113-259 21:41:45 +00:17:40 11.376 0.933
113-260 21:41:48 +00:23:53 12.284 0.331
SA_113_Y 21:41:50 +00:36:57 16 4 3 3 4 Finding Chart Airmass Table Check exptimes
113-466 21:41:27 +00:40:16 9.908 0.275
113-475 21:41:51 +00:39:21 9.979 0.817
BD+28o4211 21:51:11 +28:51:50 10.750 -0.511 15 3 4 7 20 Finding Chart Airmass Table Check exptimes
G93-48 21:52:25 +02:23:20 12.961 -0.308 40 8 8 15 30 Finding Chart Airmass Table
BD+25o4655 21:59:42 +26:25:57 9.929 -0.479 16 3 4 6 8 Finding Chart Airmass Table Check exptimes
Hiltner_1089 22:09:21 +57:51:28 10.639 0.552 18 3 3 3 3 Finding Chart Airmass Table Check exptimes
BD+17o4708 22:11:31 +18:05:34 9.350 0.290 10 3 3 3 3 Finding Chart Airmass Table Check exptimes
BD-11o5781 22:13:11 -11:10:38 9.178 0.720 12 3 3 3 3 Finding Chart Airmass Table BRIGHT! Check exptimes
SA_114_Z 22:41:04 +00:55:00 150 25 20 15 15 Finding Chart Airmass Table 114-548 in both, Might need two cycles Check exptimes
114-531 22:40:37 +00:51:56 11.880 0.540
114-548 22:41:37 +00:59:06 11.135 1.120
SA_114_Y 22:41:35 +01:06:00 150 15 10 10 15 Finding Chart Airmass Table 114-548 in both, REALLY good field, Might need 2 cycles
114-654 22:41:26 +01:10:11 11.672 0.449
114-656 22:41:35 +01:11:10 12.326 0.756
114-548 22:41:37 +00:59:06 11.135 1.120
114-750 22:41:45 +01:12:36 12.021 -0.212
G27-45 22:44:56 -02:21:13 11.282 0.503 60 12 10 8 10 Finding Chart Airmass Table Check exptimes
Ross_786 23:09:33 +00:43:02 9.706 0.540 15 3 3 3 3 Finding Chart Airmass Table Nice galaxy in field. Check exptimes
GD_246 23:12:23 +10:47:04 13.346 -0.504 50 8 8 20 50 Finding Chart Airmass Table
BD+38o4955 23:13:39 +39:25:03 10.800 0.515 18 3 3 3 3 Finding Chart Airmass Table Bright star... maybe for bad seeing nights.
LTT_9491 23:19:35 -17:05:29 12.220 0.540 75 20 20 15 15 Finding Chart Airmass Table Check exptimes
BD+33o4737 23:34:36 +34:02:22 8.840 0.572 15 3 3 3 3 Finding Chart Airmass Table BRIGHT!! Check exptimes
PG2336+004B 23:38:38 +00:42:46 12.312 0.336 60 4 4 4 10 Finding Chart Airmass Table
SA_115_Z 23:42:03 +01:12:00 100 10 10 15 15 Finding Chart Airmass Table
115-420 23:42:36 +01:05:59 11.063 0.290
SA_115_Y 23:44:15 +01:14:13 50 4 3 3 4 Finding Chart Airmass Table Bright, might need to defocus r,i for good seeing
115-516 23:44:15 +01:14:13 10.107 0.807