12033( 4) - 19-May-2011 10:23:20 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12033 Version: 4 Check-in Time: 19-May-2011 10:23:20 STScI Edit Number: 0 Title COS-GTO: Studies of the HeII Reionization Epoch Part 2 ------------------------------------------------------------------------------------ Type Cycle GTO/COS 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. James C. Green University of Colorado at Boulder CoI: Dr. Cynthia Froning University of Colorado at Boulder N CoI: Prof. J. Michael Shull University of Colorado at Boulder Y CoI: Dr. Steven V. Penton University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract Intergalactic Ly-alpha opacity suggests that H I was reionized at z ~ 6, while He II reionization was delayed to z ~ 3. Both epochs are slightly in disagreement with recent (WMAP-3) inferences from the CMB optical depth, which suggest that IGM reionization occurred at z = 10.7 (+2.7, -2.3) (Spergel et al. 2007). However, these two methods are sensitive to different ranges of ionization (neutral fractions), which allows a partially ionized IGM between z = 6-10 produced by early stars and black holes. One of the major contributions of FUSE to cosmological studies was the detection of He II Ly-alpha (Gunn-Peterson) absorption in the spectra of two AGN at redshifts z = 2.72-2.89. The He II absorption is quite patchy between redshifts z = 2.6 and 3.2 probably because the IGM is clumpy and the reionization process is affected by source fluctuations, spectra, and radiative transfer through the IGM. Observations of the He II absorption can therefore be used as diagnostics of the ionizing sources and radiative transport over large (30-50 Mpc) distances through the IGM. The ionizing radiation field appears to be softer (higher He II/H I) in the galaxy voids. These void regions may be ionized by local soft sources (dwarf starburst galaxies), or the QSO radiation may softened by escape from AGN cores and transport through denser regions in the cosmic web.With COS, we will observe the brightest He II target, HE2347-4342, a QSO with z_em = 2.885. Our goal is to obtain a G130M moderate-resolution (R = 20, 000) spectrum from 1145-1450A. Because COS has far greater throughput than either STIS or FUSE, we will be able to resolve and characterize the He II absorption lines. The region shortward of the redshifted He II (Ly-alpha) corresponds to z = 2.77-2.92, where He II exhibits patchy transmission and absorption. The ratio of He II/H I (Ly-alpha line) opacities will provide information on the ionizing radiation field (and ionizing sources) at 1 and 4 ryd. We will perform similar He II studies on three other targets, HS1700+6416, PKS1935-692, and Q0302-003. ------------------------------------------------------------------------------------ Observations Description ------------------------ Two 5-orbit G130M+G140L visits of the same target. WFC3 parallels attached to all orbits. Visit 41 should be taken at the same orientation as Visit 40. Real Time Justification ----------------------- 12033( 4) - 19-May-2011 10:23:20 - [ 2] Calibration Justification ------------------------- Additional Comments ------------------- Roll contraint added to prevent WFC3 from imaging a bright star. Prepared by Steven Penton, steven.penton@colorado.edu, 303-492-0407 ------------------------------------------------------------------------------------ 12033( 4) - 19-May-2011 10:23:20 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 4 Q0302-003 GALAXY, HIGH REDSHIFT RA=03H04M49.8590S +/- 0.1", J2000 Z = V = 17.8 +/- 0.2 F(1300) = 1.80E-16 GALAXY, LYMAN ALPHA DEC=-00D08'13.48" +/- 0.1" 3.2935 CLOUD, QSO Reference Frame: ICRS Comments: HST/GHRS gives continuum flux of F(1300) = 1.80E-16, E(B-V) 0.092 COS.A209618 gives S/N=40 (NUV imaging PSA) in 27s COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s A more recent simulation using the NUV Galex magnitude (21.366) gives S/N = 40 in 134s (COS.ta.173159) for PSA+MIRRORA imaging TA ------------------------------------------------------------------------------------------------------------------------------------ 12033( 4) - 19-May-2011 10:23:20 - [ 4] Visit: 40 Visit Requirements: On Hold Comments: Additional Comments: Five Orbits with the G130M, Goal is maximum S/N at the lowest wavelengths. There are no BOT concerns for the object. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q0302-003 COS/NUV ACQ/IMA PSA MIRRORA 1 198 S GE Comments: Target Acqusition (ACQ/Search +ACQ/IMAGE) COS.A209618 gives S/N=40 (NUV imaging PSA) in 27s A more recent simulation using the NUV Galex magnitude (21.366) gives S/N = 40 in 134s (COS.ta.173159) for PSA+MIRRORA imaging TA, to allow for target variability we'll use the lowest Galex magnitude ever observed (21.78, COS.ta.173191) which gives S/N=40 in 198s ------------------------------------------------------------------------------------------------------------------------------------ 2 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=2, BUFFER-TIME=1070 1 2199 S PAR 3 WITH 2 G Comments: Orbit at 1291, FP-POS=1 COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 3 ANY WFC3/UVI ACCUM UVIS F606W CR-SPLIT=3 1 2073 S S ------------------------------------------------------------------------------------------------------------------------------------ 4 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=2838 1 2947 S PAR 5 WITH 4 G Comments: On orbit at 1300 FPPOS=2. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 5 ANY WFC3/UVI ACCUM UVIS F606W CR-SPLIT=4 1 2400 S S ------------------------------------------------------------------------------------------------------------------------------------ 6 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=2838 1 2943 S PAR 7-8 WITH 6 G Comments: Orbit at 1291, FP-POS=3. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY WFC3/IR MULTIAC IR F098M NSAMP=15, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/IR MULTIAC IR F098M NSAMP=15, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 12033( 4) - 19-May-2011 10:23:20 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 Q0302-003 COS/FUV TIME-TA PSA G130M 1318 FP-POS=2, BUFFER-TIME=3200 1 2874 S PAR 10-11 WITH 9 G Comments: Orbit at FP-POS=4. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/IR MULTIAC IR F098M NSAMP=10, SAMP-SEQ=SPARS200 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 11 ANY WFC3/IR MULTIAC IR F125W NSAMP=10, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 12 Q0302-003 COS/FUV TIME-TA PSA G130M 1318 FP-POS=4, BUFFER-TIME=1400 1 2943 S PAR 13-15 WITH 12 G Comments: One orbit at 1300 FPPOS4. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 13 ANY WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 14 ANY WFC3/IR MULTIAC IR F160W NSAMP=10, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 15 ANY WFC3/IR MULTIAC IR F160W NSAMP=10, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ Q0302-003 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE Q0302-003 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 1 1 N/A S ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 2 1 N/A S ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 3 1 N/A S Q0302-003 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 1 2 N/A S ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 2 2 N/A S 12033( 4) - 19-May-2011 10:23:20 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 3 2 N/A S ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 4 2 N/A S Q0302-003 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G ANY 7 WFC3/IR MULTIAC IR F098M none none none none 3 N/A CUM ANY 8 WFC3/IR MULTIAC IR F098M none none none none 3 N/A CUM Q0302-003 9 COS/FUV TIME-TA PSA G130M 1318 none none none none 4 N/A G ANY 10 WFC3/IR MULTIAC IR F098M none none none none 4 N/A CUM ANY 11 WFC3/IR MULTIAC IR F125W none none none none 4 N/A CUM Q0302-003 12 COS/FUV TIME-TA PSA G130M 1318 none none none none 5 N/A G ANY 13 WFC3/IR MULTIAC IR F125W none none none none 5 N/A CUM ANY 14 WFC3/IR MULTIAC IR F160W none none none none 5 N/A CUM ANY 15 WFC3/IR MULTIAC IR F160W none none none none 5 N/A CUM 12033( 4) - 19-May-2011 10:23:20 - [ 7] Visit: 41 Visit Requirements: SAME ORIENT AS 40 On Hold Comments: Additional Comments: Five Orbits with the G130M, Goal is maximum S/N at the lowest wavelengths. There are no BOT concerns for the object. To be observed at the same orientation as Visit 40. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 Q0302-003 COS/NUV ACQ/IMA PSA MIRRORA 1 198 S GE Comments: Target Acqusition (ACQ/Search +ACQ/IMAGE) COS.A209618 gives S/N=40 (NUV imaging PSA) in 27s A more recent simulation using the NUV Galex magnitude (21.366) gives S/N = 40 in 135s (COS.ta.173159) for PSA+MIRRORA imaging TA ------------------------------------------------------------------------------------------------------------------------------------ 2 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=1, BUFFER-TIME=2080 1 2199 S PAR 3 WITH 2 G Comments: Orbit at 1291, FP-POS=1 COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 3 ANY WFC3/UVI ACCUM UVIS F606W CR-SPLIT=3 1 2073 S S ------------------------------------------------------------------------------------------------------------------------------------ 4 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=3, BUFFER-TIME=2838 1 2947 S PAR 5 WITH 4 G Comments: On orbit at 1300 FPPOS=2. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 5 ANY WFC3/UVI ACCUM UVIS F606W CR-SPLIT=4 1 2400 S S ------------------------------------------------------------------------------------------------------------------------------------ 6 Q0302-003 COS/FUV TIME-TA PSA G130M 1291 FP-POS=4, BUFFER-TIME=2838 1 2943 S PAR 7-8 WITH 6 G Comments: Orbit at 1291, FP-POS=3. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 7 ANY WFC3/IR MULTIAC IR F098M NSAMP=15, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 8 ANY WFC3/IR MULTIAC IR F098M NSAMP=15, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 12033( 4) - 19-May-2011 10:23:20 - [ 8] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 9 Q0302-003 COS/FUV TIME-TA PSA G130M 1318 FP-POS=3, BUFFER-TIME=1400 1 2874 S PAR 10-11 WITH 9 G Comments: Orbit at FP-POS=1. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 10 ANY WFC3/IR MULTIAC IR F098M NSAMP=10, SAMP-SEQ=SPARS200 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 11 ANY WFC3/IR MULTIAC IR F125W NSAMP=12, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 12 Q0302-003 COS/FUV TIME-TA PSA G140L 1105 FP-POS=3, BUFFER-TIME=1220 1 1330 S PAR 13 WITH 12 G Comments: One orbit at 1300 FPPOS4. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 13 ANY WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 14 Q0302-003 COS/FUV TIME-TA PSA G140L 1105 FP-POS=4, BUFFER-TIME=2840 1 1343 S PAR 15 WITH 14 G Comments: One orbit at 1300 FPPOS4. COS.A209674 gives G130M S/N=20 in 322ks (BT=2/3*6814)=4300s ------------------------------------------------------------------------------------------------------------------------------------ 15 ANY WFC3/IR MULTIAC IR F125W NSAMP=14, SAMP-SEQ=SPARS100 1 DEF CUM ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ Q0302-003 1 COS/NUV ACQ/IMA PSA MIRRORA none none none none 1 N/A GE Q0302-003 2 COS/FUV TIME-TA PSA G130M 1291 none none none none 1 N/A G ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 1 1 N/A S ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 2 1 N/A S ANY 3 WFC3/UVI ACCUM UVIS F606W none none none 3 1 N/A S Q0302-003 4 COS/FUV TIME-TA PSA G130M 1291 none none none none 2 N/A G ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 1 2 N/A S 12033( 4) - 19-May-2011 10:23:20 - [ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 2 2 N/A S ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 3 2 N/A S ANY 5 WFC3/UVI ACCUM UVIS F606W none none none 4 2 N/A S Q0302-003 6 COS/FUV TIME-TA PSA G130M 1291 none none none none 3 N/A G ANY 7 WFC3/IR MULTIAC IR F098M none none none none 3 N/A CUM ANY 8 WFC3/IR MULTIAC IR F098M none none none none 3 N/A CUM Q0302-003 9 COS/FUV TIME-TA PSA G130M 1318 none none none none 4 N/A G ANY 10 WFC3/IR MULTIAC IR F098M none none none none 4 N/A CUM ANY 11 WFC3/IR MULTIAC IR F125W none none none none 4 N/A CUM Q0302-003 12 COS/FUV TIME-TA PSA G140L 1105 none none none none 5 N/A G ANY 13 WFC3/IR MULTIAC IR F125W none none none none 5 N/A CUM Q0302-003 14 COS/FUV TIME-TA PSA G140L 1105 none none none none 5 N/A G ANY 15 WFC3/IR MULTIAC IR F125W none none none none 5 N/A CUM 12033( 4) - 19-May-2011 10:23:20 - [ 10] Summary Form for Proposal 12033 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures IR, PSA, UVIS ------------------------------------------------------------------------------------------------------------------------------------ Configurations COS/FUV, COS/NUV, WFC3/IR, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM, ACQ/IMAGE, MULTIACCUM, TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=1070, BUFFER-TIME=1220, BUFFER-TIME=1400, BUFFER-TIME=2080, BUFFER-TIME=2838, BUFFER-TIME=2840, BUFFER-TIME=3200, CR-SPLIT=3, CR-SPLIT=4, FP-POS=1, FP-POS=2, FP-POS=3, FP-POS=4, NSAMP=10, NSAMP=12, NSAMP=14, NSAMP=15, SAMP-SEQ=SPARS100, SAMP-SEQ=SPARS200 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PAR 10-11 WITH 9, PAR 13 WITH 12, PAR 13-15 WITH 12, PAR 15 WITH 14, PAR 3 WITH 2, PAR 5 WITH 4, PAR 7-8 WITH 6, SAME ORIENT AS 40 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F098M, F125W, F160W, F606W, G130M, G140L, MIRRORA ------------------------------------------------------------------------------------------------------------------------------------ Target Names ANY, Q0302-003 ------------------------------------------------------------------------------------------------------------------------------------