ALFOSC@NOT APR 10, 2014 Proposal no: 49-013 P.I.: E. Pancino Title: Ground-based photometry for the absolute flux calibration of Gaia. bright moon FoV 6.4'x6.4' 0.19 arc sec/pixel 2048px The detector is linear (better than ±0.5%) up to ~350000-400000 ADUs (full well= 459000 ADU/pixel, 150000 e-/pixel) and the digital saturation is 2^32ADU. Typical bias level is about 10000 ADU Conversion factor (high gain) 0.327 e-/ADU Linearity: Good up to 350 kADUs (~114500e-) (from http://www.not.iac.es/observing/cookbook/current/Cookbook.php?instrument=ALFOSC) =========================================================================== Calibration files Dome frames 10xBIAS If SKYFLATS are not feasible (because of clouds or other reasons), 10 x DOMEFLATS BVR ----------------------------- Sky frames 5 or more xSKYFLAT BVR apply small offsets after each exposure to allow for star removal; if the telescope is not tracking, you do not need to apply any offset (but tracking is preferred). ----------------------------- suggested empty field (at sunset): CAblank2 09 13 49 +46 13 58 (J2000) Landolt Standard Fields Name RA DEC (2000) PG0918+029 09 21 28 +02 46 06 PG1657+078 16 59 32 +07 43 25 If the NIGHT seems PHOTOMETRIC (Main Programme, see below): we need repeated Landolt standard fields: Observe PG0918+029 (3xBVR) at the beginning of the night (at airmass <~1.15); a bit later than 24UT observe PG0918+029 (3xBVR) again (at airmass >~1.55); observe PG1657+078 at a bit later than 1:00UT (at airmass >~1.55) and again at the end of the night (at airmass ~1.1) Keep in mind that delta airmass between to consecutive observations of the same field should be at least 0.2-0.3. While observing the landolt fields, check that all the standard stars are in the FoV and that they are bright enough. If feasible (with automatic procedures) make a ~10" dithering while acquiring the images. =========================================================================== Targets for the MAIN PROGRAMME: absolute photometry in PHOTOMETRIC NIGHTS (Landolt standard fields needed, see above) We need BVR imaging under photometric conditions. If the night seems not photometric or become not photometric, switch to the backup programme (relative photometry, see below). Point a target when it is more or less culminating (if possible). Finding charts are provided. Some targets may have large proper motions and their position may be different from the finding chart. For each target we need 3 frames per filter, If feasible (with automatic procedures) make a ~10" dithering while acquiring the images. Set the exposure time in order to avoid saturation and to get a good signal to noise: with a 1.3" seeing and airmass 1.2 a mag 13 star reaches 230000ADU (object+sky), with ~40 sec, that are ok. (see http://www.not.iac.es/observing/forms/signal/v2.2/index.php) Avoid too short exposure times, much shorter than ~1 sec. Mag 9 star should probably be observed with ~1sec, brighter stars or better seeing conditions may require shorter exposure times. If you need less than 0.5 sec, better to defocus a bit, if possible, but avoid to get donuts like stars. Priority: 1 high (stars that are NOT in our first release and with 0 or 1 night point and without spectrophotometric data) 2 medium (stars that are NOT in our first release and with 2 night points and without spectrophotometric data) 3 low (stars with 2 night points or in our first release or with spectrophotometric data) 4 very low (stars best observable in July) Name RA DEC Epoch ProperMotionRA ProperMotionDec B V Priority SpT ID Notes HD37725 05:41:54.37 +29:17:50.93 2000.0 0 0 8.12 8.31 1 A3 051 NotYet AGK+81266 09:21:19.18 +81:43:27.64 2000.0 0 0 11.60 11.94 4 O 025 3xObs Feige56 12:06:47.23 +11:40:12.64 2000.0 0 0 10.93 11.06 3 B5p 026 1xData Feige66 12:37:23.52 +25:03:59.87 2000.0 0 0 10.22 10.51 3 O 013 2xData GD153 12:57:02.33 +22:01:52.52 2000.0 0 0 13.07 13.35 2 DA1 003 2xData SPSS355 in the same field!!!! observe them together SA105-663 13:37:30.34 -00:13:17.37 2000.0 0 0 9.10 8.76 1 F2 028 1xData SA105-448 13:37:47.07 -00:37:33.02 2000.0 0 0 9.44 9.19 3 A3 029 1xData GRW+705824 13:38:50.47 +70:17:07.62 2000.0 0 0 12.68 12.77 1 DA3 015 1xData P41-C 14:51:57.99 +71:43:17.38 2000.0 0 0 12.84 12.16 1 G0 042 2xData SA107-544 15:36:48.10 -00:15:07.11 2000.0 0 0 9.44 9.04 3 F3 032 2xData P177-D 15:59:13.57 +47:36:41.90 2000.0 0 0 13.96 13.36 3 G0 043 2xData (1743045) 17:43:04.48 +66:55:01.60 2000.0 0 0 13.80 13.52 4 A5 035 2xData (KF08T3) 17:55:16.23 +66:10:11.70 2000.0 0 0 14.30 13.50 4 K0 045 1xObs (KF01T5) 18:04:03.80 +66:55:43.00 2000.0 0 0 - 13.56 4 K1 048 NotYet (1805292) 18:05:29.28 +64:27:52.00 2000.0 0 0 12.50 12.06 4 A6 036 1xObs (1812095) 18:12:09.57 +63:29:42.30 2000.0 0 0 11.90 11.80 4 A5 037 2xObs (EG131) 19:20:34.93 -07:40:00.05 2000.0 0 0 12.35 12.28 4 DBQ5 050 Not Yet ABS PHOT SECONDARY SPSS name RA DEC Epoch ProperMotionRA ProperMotionDec B V Priority Type ID Abs Notes G251-54 08:11:06.24 +79:54:29.57 2000.0 0 0 10.58 10.01 1 G0 114 2xData CPM pair, sep. 110" WD1029+537 10:32:10.26 +53:29:36.40 2000.0 0 0 14.18 14.46 1 DA1 234 1xObs - G146-76 10:59:57.48 +44:46:43.75 2000.0 0 0 11.15 10.47 1 G/K 120 2xData bin. sep>25"? G254-24 11:32:23.31 +76:39:18.03 2000.0 0 0 12.18 11.53 2 G0 123 2xObs bin., sep.>25"? WD1234+481 12:36:45.18 +47:55:22.34 2000.0 0 0 14.09 14.42 2 DA1 244 2xData - G14-24 13:02:01.58 -02:05:21.42 2000.0 0 0 13.52 12.81 3 K0 130 2xData wide bin., sep. ~ 16" WD1408+323 14:10:26.95 +32:08:36.10 2000.0 0 0 13.96 13.97 3 DA3 248 2xData - G15-10 15:09:46.02 -04:45:06.61 2000.0 0 0 12.67 12.01 2 G2 132 1xData wide bin., separ ~ 20" or 677" WD1509+322 15:11:27.66 +32:04:17.80 2000.0 0 0 14.20 14.11 3 DA3 250 2xData - G224-83 15:46:14.68 +62:26:39.60 2000.0 0 0 13.86 12.67 3 K 133 2xObs bin., sep>25"? WD1553+353 15:55:01.99 +35:13:28.70 2000.0 0 0 14.64 14.75 2 DA2 252 2xData V>14.5 G16-20 15:58:18.62 +02:03:06.11 2000.0 0 0 11.34 10.75 3 K 134 2xData bin., sep>25"? WD1606+422 16:08:22.20 +42:05:43.20 2000.0 0 0 13.93 13.82 3 DA4 193 NotYet probable DD, better avoid WD1615-154 16:17:55.26 -15:35:51.90 2000.0 0 0 13.22 13.42 3 DA2 135 2xData Landolt photometric standard WD1626+368 16:28:25.03 +36:46:15.40 2000.0 0 0 14.02 13.83 3 DZA6 194 1xData - WD1637+335 16:39:27.83 +33:25:22.30 2000.0 0 0 14.85 14.65 2 DA5 254 2xData V>14.5 G170-47 17:32:41.63 +23:44:11.64 2000.0 0 0 9.54 8.94 3 G0 139 1xData bin., sep>25"? (2MASSJ17571324+6703409) 17:57:13.25 +67:03:40.90 2000.0 0 0 11.91 12.01 4 A3 (309) 2xObs Close to N Ecliptic Pole (TYC4213-617-1) 18:00:02.14 +66:45:54.96 2000.0 0 0 11.24 10.68 4 - (310) 2xObs Close to N Ecliptic Pole (BD+661071) 18:02:10.92 +66:12:26.39 2000.0 0 0 10.93 10.52 4 F5 (311) 2xObs Close to N Ecliptic Pole (G184-17) 18:40:29.27 +19:36:06.65 2000.0 0 0 14.90 14.08 4 K (259) 2xData High p.m., bin. sep ~17"-20" (WD1845+019) 18:47:39.08 +01:57:35.62 2000.0 0 0 12.73 12.95 4 DA2 (141) 2xData candidate DA+dM. sep ~3" (WD1936+327) 19:38:28.21 +32:53:19.90 2000.0 0 0 13.46 13.58 4 DA2 (199) 2xData - =========================================================================== BACKUP PROGRAM Targets (1h series in B band only to build light curves with relative photometry) If the night is NOT PHOTOMETRIC we can make relative photometry. No standard Fields are required. Observe the following targets (when culminating or highest) for at least 1 hour (and no less than 30 frames if exp time is longer than 2min) aquiring a series of B band images (no dithering is needed) Check the target ADU to avoid saturation along the series (if there are veils exp time may need to be increased/decreased. Check ALSO that at least 2 stars with a magnitude similar to the target are in the field. If there are very bright stars with respect to the target do not reduce the exp time to avoid saturation, better to set an exp time long enough to well observe more fainter stars (provided that the target is always below saturation). If moving the target a bit far from the center allows you to include more stars that can be used as comparison stars, do it. Even if short exp time is needed, use a guide star to avoid a drift along the 1h sequence. Priority: 1 high (star in our first release) 2 low (stars NOT in our first release) name RA DEC Epoch ProperMotionRA ProperMotionDec B V priority Type ID Short Notes Var SDSS_J125716+220059 12:57:16.13 +22:00:59.36 2000.0 0 0 13.59 12.75 2 D? 355 NotYet In the same FOV of SPSS 003 GJ521 13:39:24.10 +46:11:11.37 2000.0 0 0 11.50 10.26 1 M2 336 Obs,Data Red star G179-54 15:46:08.25 +39:14:16.40 2000.0 0 0 13.90 13.41 1 F 192 Obs,Data wide bin, sep 7":better to avoid G16-20 15:58:18.62 +02:03:06.11 2000.0 0 0 11.34 10.75 1 K 134 Obs bin., sep>25"? WD1606+422 16:08:22.20 +42:05:43.20 2000.0 0 0 13.93 13.82 1 DA4 193 Obs,Data probable DD, better avoid G139-16 17:09:47.38 +08:04:25.50 2000.0 0 0 13.31 12.61 2 K 138 Obs,Data Bin. sep ~3":contaminated? =========================================================================== catalogue in http://www.not.iac.es/observing/forms/catalog/ Name RA DEC Epoch ProperMotionRA ProperMotionDec MagnitudeV FC PG0918+029 09 21 28.0 +02 46 06.0 2000.0 0 0 0 PG0918.gif PG1657+078 16 59 32.0 +07 43 25.0 2000.0 0 0 0 PG1657.gif HD37725 05:41:54.37 +29:17:50.93 2000.0 0 0 8.31 SPSS051-HD37725map.jpg AGK+81266 09:21:19.18 +81:43:27.64 2000.0 0 0 11.94 SPSS025-AGK81266.gif Feige56 12:06:47.23 +11:40:12.64 2000.0 0 0 11.06 SPSS026-Feige56.jpg Feige66 12:37:23.52 +25:03:59.87 2000.0 0 0 10.51 SPSS013-Feige66.jpg GD153 12:57:02.33 +22:01:52.52 2000.0 0 0 13.35 SPSS003-GD153.jpg , SPSS003-SPSS355-GD153-SDSS_J125716.jpg (same field of SPSS355 SDSS_J125716+220059) SA105-663 13:37:30.34 -00:13:17.37 2000.0 0 0 8.76 SPSS028-SA105-663.jpg SA105-448 13:37:47.07 -00:37:33.02 2000.0 0 0 9.19 SPSS029-SA105-448.jpg GRW+705824 13:38:50.47 +70:17:07.62 2000.0 0 0 12.77 SPSS015-GRW705824.gif P41-C 14:51:57.99 +71:43:17.38 2000.0 0 0 12.16 SPSS042-P041C.gif SA107-544 15:36:48.10 -00:15:07.11 2000.0 0 0 9.04 SPSS032-Sa107-544.gif P177-D 15:59:13.57 +47:36:41.90 2000.0 0 0 13.36 SPSS043-P177D.gif 1743045 17:43:04.48 +66:55:01.60 2000.0 0 0 13.52 SPSS035-1743045.gif KF08T3 17:55:16.23 +66:10:11.70 2000.0 0 0 13.50 SPSS045-KF08T3.gif KF01T5 18:04:03.80 +66:55:43.00 2000.0 0 0 13.56 SPSS048-KF01T5.gif 1805292 18:05:29.28 +64:27:52.00 2000.0 0 0 12.06 SPSS036-1805292.gif 1812095 18:12:09.57 +63:29:42.30 2000.0 0 0 11.80 SPSS037-1812095.gif EG131 19:20:34.93 -07:40:00.05 2000.0 0 0 12.28 SPSS050-EG131.gif G251-54 08:11:06.24 +79:54:29.57 2000.0 0 0 10.01 SPSS114-G251-54large.jpg WD1029+537 10:32:10.26 +53:29:36.40 2000.0 0 0 14.46 SPSS234-WD1029-537.gif G146-76 10:59:57.48 +44:46:43.75 2000.0 0 0 10.47 SPSS120-G146-76.gif G254-24 11:32:23.31 +76:39:18.03 2000.0 0 0 11.53 SPSS123-G254-24.jpeg WD1234+481 12:36:45.18 +47:55:22.34 2000.0 0 0 14.42 SPSS244-WD1234+481mccook.gif G14-24 13:02:01.58 -02:05:21.42 2000.0 0 0 12.81 SPSS130-G14-24.gif WD1408+323 14:10:26.95 +32:08:36.10 2000.0 0 0 13.97 SPSS248-WD1408-323warwick.gif G15-10 15:09:46.02 -04:45:06.61 2000.0 0 0 12.01 SPSS132-G15-10.gif WD1509+322 15:11:27.66 +32:04:17.80 2000.0 0 0 14.11 SPSS250-WD1509-322warwick.gif G224-83 15:46:14.68 +62:26:39.60 2000.0 0 0 12.67 SPSS133-G224-83.gif WD1553+353 15:55:01.99 +35:13:28.70 2000.0 0 0 14.75 SPSS252-WD1553-353mccook.gif G16-20 15:58:18.62 +02:03:06.11 2000.0 0 0 10.75 SPSS134-G16-20.gif , SPSS134-G16-20spm.gif.jpg WD1606+422 16:08:22.20 +42:05:43.20 2000.0 0 0 13.82 SPSS193-WD1606-422mccook.gif WD1615-154 16:17:55.26 -15:35:51.90 2000.0 0 0 13.42 SPSS135-WD1615-154warwick.gif WD1626+368 16:28:25.03 +36:46:15.40 2000.0 0 0 13.83 SPSS194-WD1626-368mccook.gif WD1637+335 16:39:27.83 +33:25:22.30 2000.0 0 0 14.65 SPSS254-WD1637-335warwick.gif G170-47 17:32:41.63 +23:44:11.64 2000.0 0 0 8.94 SPSS139-G170-47.gif 2MASSJ17571324 17:57:13.25 +67:03:40.90 2000.0 0 0 12.01 SPSS309-2MASSJ17571324p6703409.gif TYC4213-617-1 18:00:02.14 +66:45:54.96 2000.0 0 0 10.68 SPSS310-TYC4213-617-1.jpg BD+661071 18:02:10.92 +66:12:26.39 2000.0 0 0 10.52 SPSS311-BD+661071.jpg G184-17 18:40:29.27 +19:36:06.65 2000.0 0 0 14.08 SPSS259-G184-17spm.jpg WD1845+019 18:47:39.08 +01:57:35.62 2000.0 0 0 12.95 SPSS141-WD1845-019spm.gif.jpg WD1936+327 19:38:28.21 +32:53:19.90 2000.0 0 0 13.58 SPSS199-WD1936-327spm.jpg SDSS_J125716+220059 12:57:16.13 +22:00:59.36 2000.0 0 0 12.75 SPSS355-SPSS003-SDSS_J125716-GD153.jpg (same field of GD153) GJ521 13:39:24.10 +46:11:11.37 2000.0 0 0 10.26 SPSS336-GJ521.jpg G179-54 15:46:08.25 +39:14:16.40 2000.0 0 0 13.41 SPSS192-G179-54.gif , SPSS192-G179-54spm.jpg G139-16 17:09:47.38 +08:04:25.50 2000.0 0 0 12.61 SPSS138-G139_16spm.jpg