12267( 3) - 13-Jul-2010 17:59:51 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12267 Version: 3 Check-in Time: 13-Jul-2010 17:59:51 STScI Edit Number: 1 Title Dissecting star formation, extinction, and stellar populations in the brightest lensed galaxy ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jane R. Rigby Carnegie Institution of Washington CoI: Dr. Michael D. Gladders University of Chicago N CoI: Dr. Keren Sharon University of Chicago N CoI: Ms. Eva Wuyts University of Chicago N CoI: Dr. Benjamin Koester University of Chicago N CoI: Mr. Matthew Bayliss University of Chicago N CoI: Prof. L Felipe Barrientos Universidad Catolica de Chile N ------------------------------------------------------------------------------------ Abstract Gravitational lensing provides rare chances to study high-redshift galaxies in otherwise unobtainable ways. We propose to survey star formation in a spectacular lensed galaxy, the brightest yet discovered. We propose to map, at ~100 pc scales, the star formation (via H beta) and the extinction (via the H-beta to H-alpha ratio) using narrow-band filters, and to map the UV spectral slope and the Balmer break using broad-band filters. In a typical galaxy at the epoch when most of the Universe's stars formed, these maps will show where stars are forming within the galaxy; the range of extinction and its morphology; and the performance of multiple diagnostics of star formation rate on a pixel-by-pixel basis. [Note: we proposed H alpha imaging with NICMOS, but NICMOS will not be turned on in Cycle 18. Instead, we will map star formation with Hbeta, and obtain a ground-based map of Ha/Hb.] ------------------------------------------------------------------------------------ Observations Description ------------------------ We pack 7 WFC3 filters into 4 orbits: the UVIS filters F390W, F606W, and F814W, and the IR channel filters F098M, F125W, F160W, and F132N. There are 4 dither positions, to reconstruct the PSF, reject cosmic rays, and compensate for the chip-gap. We use only one visit, so that the roll angles will be the same, to aid comparison among filters. In the WFC3-IR channel, we choose to be readnoise limited rather than skynoise limited, because the target is fairly bright (integrated g-band magnitude of 19.1, extended over 38 arcsec), because our science goals demand a large filterset, and because multiple dither positions are needed. We choose SPARS50 as the timing sequence for all IR-channel observations, as it provides flexible orbit-packing and provides an adequate number of readouts per exposure. These wide-band IR filters become skynoise--dominated in about 400-600s (tab 7.12 of the instrument manual), compared to our per-dither exposures of 200-300s. Thus, these exposures will be mildly readnoise limited. The total integration times of 1212, 862, 862s (F098M, F125W, F160W) exceed the signal-to-noise 12267( 3) - 13-Jul-2010 17:59:51 - [ 2] requirements we calculated in Phase 1. Our narrow-band W3 F132N exposure time is a total of 2210s, meeting the required depth calculated in Phase 1. Because the background is so low in this narrow band, the individual dithered exposures are readnoise limited. We adjust the UVIS exposure times to fill the orbits. The integration in each filter exceeds the requirements we calculated in Phase 1. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12267( 3) - 13-Jul-2010 17:59:51 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 RCS0327-1326 CLUSTER OF GALAXIES, RA=03H27M27.2000S +/- 0.1", J2000 V = 19.1 +/- 0.2 GRAVITATIONAL LENS DEC=-13D26'24.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 12267( 3) - 13-Jul-2010 17:59:51 - [ 4] Visit: 01 Visit Requirements: ORIENT 330D TO 210 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 RCS0327-132 WFC3/UVI ACCUM UVIS1 F606W CR-SPLIT=NO 1 250 S POS TARG 0, -2; GS ACQ 6 S SCENARIO BASE1B3 ------------------------------------------------------------------------------------------------------------------------------------ 2 RCS0327-132 WFC3/UVI ACCUM UVIS1 F390W CR-SPLIT=NO 1 379 S POS TARG 0, -2 6 S ------------------------------------------------------------------------------------------------------------------------------------ 3 RCS0327-132 WFC3/IR MULTIAC IR-FIX F132N NSAMP=13, SAMP-SEQ=SPARS50 1 DEF POS TARG 0, 21 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 4 RCS0327-132 WFC3/IR MULTIAC IR-FIX F125W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 0, 21 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 5 RCS0327-132 WFC3/IR MULTIAC IR-FIX F160W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 0, 21 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 6 RCS0327-132 WFC3/IR MULTIAC IR-FIX F098M NSAMP=7, SAMP-SEQ=SPARS50 1 DEF POS TARG 0, 21 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 7 RCS0327-132 WFC3/UVI ACCUM UVIS1 F814W CR-SPLIT=NO 1 400 S POS TARG 0, -2 6 S ------------------------------------------------------------------------------------------------------------------------------------ 8 RCS0327-132 WFC3/UVI ACCUM UVIS1 F606W CR-SPLIT=NO 1 250 S POS TARG 0.099, -1.894 6 S ------------------------------------------------------------------------------------------------------------------------------------ 9 RCS0327-132 WFC3/UVI ACCUM UVIS1 F814W CR-SPLIT=NO 1 665 S POS TARG 0.099, -1.894 6 S ------------------------------------------------------------------------------------------------------------------------------------ 10 RCS0327-132 WFC3/IR MULTIAC IR-FIX F132N NSAMP=11, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.474, 21.424 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 11 RCS0327-132 WFC3/IR MULTIAC IR-FIX F125W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.474, 21.424 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 12 RCS0327-132 WFC3/IR MULTIAC IR-FIX F160W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.474, 21.424 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 13 RCS0327-132 WFC3/IR MULTIAC IR-FIX F098M NSAMP=7, SAMP-SEQ=SPARS50 1 DEF POS TARG 0.474, 21.424 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 14 RCS0327-132 WFC3/UVI ACCUM UVIS1 F390W CR-SPLIT=NO 1 320 S POS TARG 0.099, -1.894 6 S ------------------------------------------------------------------------------------------------------------------------------------ 12267( 3) - 13-Jul-2010 17:59:51 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 15 RCS0327-132 WFC3/UVI ACCUM UVIS1 F606W CR-SPLIT=NO 1 250 S POS TARG 1.446, 0.926 6 S see below ------------------------------------------------------------------------------------------------------------------------------------ 16 RCS0327-132 WFC3/UVI ACCUM UVIS1 F390W CR-SPLIT=NO 1 379 S POS TARG 1.446, 0.926 6 S see below ------------------------------------------------------------------------------------------------------------------------------------ 17 RCS0327-132 WFC3/IR MULTIAC IR-FIX F132N NSAMP=13, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.446, 23.926 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 18 RCS0327-132 WFC3/IR MULTIAC IR-FIX F125W NSAMP=6, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.446, 23.926 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 19 RCS0327-132 WFC3/IR MULTIAC IR-FIX F160W NSAMP=6, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.446, 23.926 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 20 RCS0327-132 WFC3/IR MULTIAC IR-FIX F098M NSAMP=7, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.446, 23.926 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 21 RCS0327-132 WFC3/UVI ACCUM UVIS1 F814W CR-SPLIT=NO 1 400 S POS TARG 1.446, 0.926 6 S see below ------------------------------------------------------------------------------------------------------------------------------------ 22 RCS0327-132 WFC3/UVI ACCUM UVIS1 F606W CR-SPLIT=NO 1 250 S POS TARG 1.545, 1.032 6 S ------------------------------------------------------------------------------------------------------------------------------------ 23 RCS0327-132 WFC3/UVI ACCUM UVIS1 F814W CR-SPLIT=NO 1 665 S POS TARG 1.545, 1.032 6 S ------------------------------------------------------------------------------------------------------------------------------------ 24 RCS0327-132 WFC3/IR MULTIAC IR-FIX F132N NSAMP=11, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.92, 24.35 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 25 RCS0327-132 WFC3/IR MULTIAC IR-FIX F125W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.92, 24.35 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 26 RCS0327-132 WFC3/IR MULTIAC IR-FIX F160W NSAMP=5, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.92, 24.35 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 27 RCS0327-132 WFC3/IR MULTIAC IR-FIX F098M NSAMP=7, SAMP-SEQ=SPARS50 1 DEF POS TARG 1.92, 24.35 6 CUM ------------------------------------------------------------------------------------------------------------------------------------ 28 RCS0327-132 WFC3/UVI ACCUM UVIS1 F390W CR-SPLIT=NO 1 320 S POS TARG 1.545, 1.032 6 S ------------------------------------------------------------------------------------------------------------------------------------ 12267( 3) - 13-Jul-2010 17:59:51 - [ 6] 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 | ------------------------------------------------------------------------------------------------------------------------------------ RCS0327-1326 1 WFC3/UVI ACCUM UVIS1 F606W none none none none 1 N/A S RCS0327-1326 2 WFC3/UVI ACCUM UVIS1 F390W none none none none 1 N/A S RCS0327-1326 3 WFC3/IR MULTIAC IR-FIX F132N none none none none 1 N/A CUM RCS0327-1326 4 WFC3/IR MULTIAC IR-FIX F125W none none none none 1 N/A CUM RCS0327-1326 5 WFC3/IR MULTIAC IR-FIX F160W none none none none 1 N/A CUM RCS0327-1326 6 WFC3/IR MULTIAC IR-FIX F098M none none none none 1 N/A CUM RCS0327-1326 7 WFC3/UVI ACCUM UVIS1 F814W none none none none 1 N/A S RCS0327-1326 8 WFC3/UVI ACCUM UVIS1 F606W none none none none 2 N/A S RCS0327-1326 9 WFC3/UVI ACCUM UVIS1 F814W none none none none 2 N/A S RCS0327-1326 10 WFC3/IR MULTIAC IR-FIX F132N none none none none 2 N/A CUM RCS0327-1326 11 WFC3/IR MULTIAC IR-FIX F125W none none none none 2 N/A CUM RCS0327-1326 12 WFC3/IR MULTIAC IR-FIX F160W none none none none 2 N/A CUM RCS0327-1326 13 WFC3/IR MULTIAC IR-FIX F098M none none none none 2 N/A CUM RCS0327-1326 14 WFC3/UVI ACCUM UVIS1 F390W none none none none 2 N/A S RCS0327-1326 15 WFC3/UVI ACCUM UVIS1 F606W none none none none 3 253.0 S S RCS0327-1326 16 WFC3/UVI ACCUM UVIS1 F390W none none none none 3 382.0 S S RCS0327-1326 17 WFC3/IR MULTIAC IR-FIX F132N none none none none 3 N/A CUM RCS0327-1326 18 WFC3/IR MULTIAC IR-FIX F125W none none none none 3 N/A CUM RCS0327-1326 19 WFC3/IR MULTIAC IR-FIX F160W none none none none 3 N/A CUM RCS0327-1326 20 WFC3/IR MULTIAC IR-FIX F098M none none none none 3 N/A CUM RCS0327-1326 21 WFC3/UVI ACCUM UVIS1 F814W none none none none 3 403.0 S S 12267( 3) - 13-Jul-2010 17:59:51 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ RCS0327-1326 22 WFC3/UVI ACCUM UVIS1 F606W none none none none 4 N/A S RCS0327-1326 23 WFC3/UVI ACCUM UVIS1 F814W none none none none 4 N/A S RCS0327-1326 24 WFC3/IR MULTIAC IR-FIX F132N none none none none 4 N/A CUM RCS0327-1326 25 WFC3/IR MULTIAC IR-FIX F125W none none none none 4 N/A CUM RCS0327-1326 26 WFC3/IR MULTIAC IR-FIX F160W none none none none 4 N/A CUM RCS0327-1326 27 WFC3/IR MULTIAC IR-FIX F098M none none none none 4 N/A CUM RCS0327-1326 28 WFC3/UVI ACCUM UVIS1 F390W none none none none 4 N/A S 12267( 3) - 13-Jul-2010 17:59:51 - [ 8] Summary Form for Proposal 12267 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR-FIX, UVIS1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, MULTIACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO, NSAMP=11, NSAMP=13, NSAMP=5, NSAMP=6, NSAMP=7, SAMP-SEQ=SPARS50 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements GS ACQ SCENARIO BASE1B3, ORIENT 330D TO 210 D, POS TARG 0, -2, POS TARG 0, 21, POS TARG 0.099, -1.894, POS TARG 0.474, 21.424, POS TARG 1.446, 0.926, POS TARG 1.446, 23.926, POS TARG 1.545, 1.032, POS TARG 1.92, 24.35 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F098M, F125W, F132N, F160W, F390W, F606W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names RCS0327-1326 ------------------------------------------------------------------------------------------------------------------------------------