13860( 4) - 03-Sep-2014 12:31:07 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13860 Version: 4 Check-in Time: 03-Sep-2014 12:31:07 STScI Edit Number: 0 Title Investigating the low-mass slope and possible turnover in the LMC IMF ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Mario Gennaro Space Telescope Science Institute Y CoI: Dr. Thomas M. Brown Space Telescope Science Institute N CoI: Dr. Wolfgang Brandner Max-Planck-Institut fur Astronomie, N Heidelberg CoI: Dr. Pier Giorgio Prada Moroni Universita di Pisa N CoI: Dr. Emanuele Tognelli Universita di Pisa N CoI: Dr. Dimitrios Gouliermis Zentrum fur Astronomie - Universitat N Heidelberg ------------------------------------------------------------------------------------ Abstract We propose to derive the Initial Mass Function (IMF) of the field population of the Large Magellanic Cloud (LMC) down to 0.2 solar masses, probing the mass regime where the characteristic IMF turnover is observed in our Galaxy. The power of the HST, using the WFC3 IR channel, is necessary to obtain photometric mass estimates for the faint, cool, dwarf stars with masses below the expected IMF turnover point. Only by probing the IMF down to such masses, it will be possible to clearly distinguish between a bottom-heavy or bottom-light IMF in the LMC. Recent studies, using the deepest available observations for the Small Magellanic Cloud, cannot find clear evidence of a turnover in the IMF for this galaxy, suggesting a bottom-heavy IMF in contrast to the Milky Way. A similar study of the LMC is needed to confirm a possible dependence of the low-mass IMF with galactic environment. Studies of giant ellipticals have recently challenged the picture of a universal IMF, and suggest an enviromental dependence of the IMF, with the most massive galaxies having a larger fraction of low mass stars and no IMF turnover. A study of possible IMF variations from resolved stellar populations in nearby galaxies is of great importance in sheding light on this issue. Our simple approach, using direct evidence from basic star counts, is much less prone to systematic errors with respect to studies of more distant objects which have to rely on the observations of integrated properties. ------------------------------------------------------------------------------------ Observations Description ------------------------ Our observations are designed to reach the low-mass main sequence of the field population in the Large Magaellanic Cloud, using WFC3/IR, down to about 0.25 Msun at SNR=10. The aim is to constrain the slope and possible turnover of the IMF in the LMC. The target magnitudes in F110W and F160W are equivalent to V=30 mag (Vega) for the appropriate stellar spectral type. We have designed parallel ACS observations in F606W and F814W that, while not reaching the same depth, will add constraints to the star formation history of the chosen region. The 12 allocated orbits are grouped into 6 visits of 2 orbits each. The primary observations of the first 4 visits (8 orbits) are executed using 13860( 4) - 03-Sep-2014 12:31:07 - [ 2] the F160W filter, while for the other 2 visits (4 orbits) we use F110W. We use the SAMP-SEQ=STEP200 WFC3/IR sampling sequence, which allow us to maximize both the effective observing time, and the number of read samples (14 or 15). The parallel observations are divided into short, medium and long exposures, to capture the dynamical range of the observed stars with ACS; 5 (2 for short + medium, 3 for long exposures) parallel orbits are dedicated to F814W and 7 (2 for short + medium, 5 for long exposures) to F606W. In the short ACS exposures we use post-flash (FLASH=75) illumination to improve the CTE. Each visit consists of 4 primary exposures in a box dithering pattern, to better sample the PSF. The pattern matches the default pattern in the WFC3 Handbook. Between visits we execute additional small offsets (few pixels) to ensure that no star falls repeatedly on the same position, thus minimizing the impact of detector artifacts. ------------------------------------------------------------------------------------ 13860( 4) - 03-Sep-2014 12:31:07 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 GALAXY, MAGELLANIC RA=05H03M1.5100S +/- 1", J2000 V = 30 +/- 0.1 IRREGULAR DEC=-66D24'15.50" +/- 1" Reference Frame: ICRS ------------------------------------------------------------------------------------------------------------------------------------ 13860( 4) - 03-Sep-2014 12:31:07 - [ 4] Visit: 01 Visit Requirements: ORIENT 300D TO 180 D On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F160W filter and in parallel we will have ACS/F606W We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. The parallel orbits are dedicated to short and medium ACS exposures Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG 0, 0; PAR 2-3 CUM (1399.231 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.542, 0.182; CUM (1599.231 PAR 5-6 WITH 4 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.339, 0.485; CUM (1599.231 PAR 8-9 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -0.203, 0.303; CUM (1599.231 PAR 11-12 WITH 10 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 13860( 4) - 03-Sep-2014 12:31:07 - [ 5] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 3 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 4 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 5 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 6 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F606W none none none none 2 N/A LMC-FIELD-1 9 ACS/WFC ACCUM WFC F606W none none none none 2 N/A LMC-FIELD-1 10 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 11 ACS/WFC ACCUM WFC F606W none none none none 2 N/A LMC-FIELD-1 12 ACS/WFC ACCUM WFC F606W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 6] Visit: 02 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F160W filter and in parallel we will have ACS/F606W We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG 0.813, 0.; PAR CUM (1399.231 2 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1350 S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 1.355, 0.182; CUM (1599.231 PAR 4 WITH 3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 1.152, 0.484; CUM (1599.231 PAR 6 WITH 5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.610, 0.303; CUM (1599.231 PAR 8 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 4 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 5 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 6 ACS/WFC ACCUM WFC F606W none none none none 2 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F606W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 8] Visit: 03 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F160W filter and in parallel we will have ACS/F606W We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG 0.813, 0.727; CUM (1399.231 PAR 2 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1350 S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 1.355, 0.908; CUM (1599.231 PAR 4 WITH 3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 1.152, 1.211; CUM (1599.231 PAR 6 WITH 5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.610, 1.029; CUM (1599.231 PAR 8 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 9] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 4 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 5 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 6 ACS/WFC ACCUM WFC F606W none none none none 2 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F606W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 10] Visit: 04 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F160W filter and in parallel we will have ACS/F606W for 1 orbit and ACS/814W for the other orbit. We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG 0., 0.727; PAR CUM (1399.231 2 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1350 S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.542, 0.908; CUM (1599.231 PAR 4 WITH 3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 ACS/WFC ACCUM WFC F606W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.339, 1.211; CUM (1599.231 PAR 6 WITH 5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1350 S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F160W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -0.203, 1.029; CUM (1599.231 PAR 8 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F606W none none none none 1 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 11] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 3 WFC3/IR MULTIAC IR F160W none none none none 1 N/A CUM LMC-FIELD-1 4 ACS/WFC ACCUM WFC F606W none none none none 1 N/A LMC-FIELD-1 5 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 6 ACS/WFC ACCUM WFC F814W none none none none 2 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F160W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F814W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 12] Visit: 05 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F110W filter and in parallel we will have ACS/F814W We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. The parallel orbits are dedicated to short and medium ACS exposures Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG -0.813, -0.727; CUM (1399.231 PAR 2-3 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -0.271, -0.545; CUM (1599.231 PAR 5-6 WITH 4 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -0.474, -0.242; CUM (1599.231 PAR 8-9 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -1.016, -0.424; CUM (1599.231 PAR 11-12 WITH 10 S) ------------------------------------------------------------------------------------------------------------------------------------ 11 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 60 S (60 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W FLASH=75 1 6 S (6 S) ------------------------------------------------------------------------------------------------------------------------------------ 13860( 4) - 03-Sep-2014 12:31:07 - [ 13] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F814W none none none none 1 N/A LMC-FIELD-1 3 ACS/WFC ACCUM WFC F814W none none none none 1 N/A LMC-FIELD-1 4 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM LMC-FIELD-1 5 ACS/WFC ACCUM WFC F814W none none none none 1 N/A LMC-FIELD-1 6 ACS/WFC ACCUM WFC F814W none none none none 1 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F814W none none none none 2 N/A LMC-FIELD-1 9 ACS/WFC ACCUM WFC F814W none none none none 2 N/A LMC-FIELD-1 10 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM LMC-FIELD-1 11 ACS/WFC ACCUM WFC F814W none none none none 2 N/A LMC-FIELD-1 12 ACS/WFC ACCUM WFC F814W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 14] Visit: 06 Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: Two orbits visit. The primary will be WFC3/IR with the F110W filter and in parallel we will have ACS/F814W We will execute a 4-point dither pattern to improve PSF sampling. Between visits we will execute an additional offset. This will ensure that no star is observed at the same chip location twice, thus avoiding bad pixels. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=14, SAMP-SEQ=STEP200 1 DEF POS TARG 0., -0.727; PAR CUM (1399.231 2 WITH 1 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1350 S (1350 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.542, -0.545; CUM (1599.231 PAR 4 WITH 3 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG 0.339, -0.242; CUM (1599.231 PAR 6 WITH 5 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 LMC-FIELD-1 WFC3/IR MULTIAC IR F110W NSAMP=15, SAMP-SEQ=STEP200 1 DEF POS TARG -0.203, -0.424; CUM (1599.231 PAR 8 WITH 7 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 LMC-FIELD-1 ACS/WFC ACCUM WFC F814W 1 1500 S (1500 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 1 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM LMC-FIELD-1 2 ACS/WFC ACCUM WFC F814W none none none none 1 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 15] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ LMC-FIELD-1 3 WFC3/IR MULTIAC IR F110W none none none none 1 N/A CUM LMC-FIELD-1 4 ACS/WFC ACCUM WFC F814W none none none none 1 N/A LMC-FIELD-1 5 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM LMC-FIELD-1 6 ACS/WFC ACCUM WFC F814W none none none none 2 N/A LMC-FIELD-1 7 WFC3/IR MULTIAC IR F110W none none none none 2 N/A CUM LMC-FIELD-1 8 ACS/WFC ACCUM WFC F814W none none none none 2 N/A 13860( 4) - 03-Sep-2014 12:31:07 - [ 16] Summary Form for Proposal 13860 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/IR ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=75, NSAMP=14, NSAMP=15, SAMP-SEQ=STEP200 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 300D TO 180 D, PAR 11-12 WITH 10, PAR 2 WITH 1, PAR 2-3 WITH 1, PAR 4 WITH 3, PAR 5-6 WITH 4, PAR 6 WITH 5, PAR 8 WITH 7, PAR 8-9 WITH 7, POS TARG -0.203, -0.424, POS TARG -0.203, 0.303, POS TARG -0.203, 1.029, POS TARG -0.271, -0.545, POS TARG -0.474, -0.242, POS TARG -0.813, -0.727, POS TARG -1.016, -0.424, POS TARG 0, 0, POS TARG 0., -0.727, POS TARG 0., 0.727, POS TARG 0.339, -0.242, POS TARG 0.339, 0.485, POS TARG 0.339, 1.211, POS TARG 0.542, -0.545, POS TARG 0.542, 0.182, POS TARG 0.542, 0.908, POS TARG 0.610, 0.303, POS TARG 0.610, 1.029, POS TARG 0.813, 0., POS TARG 0.813, 0.727, POS TARG 1.152, 0.484, POS TARG 1.152, 1.211, POS TARG 1.355, 0.182, POS TARG 1.355, 0.908, SAME ORIENT AS 01 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F110W, F160W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names LMC-FIELD-1 ------------------------------------------------------------------------------------------------------------------------------------