13702( 5) - 22-Jan-2015 15:24:41 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 13702 Version: 5 Check-in Time: 22-Jan-2015 15:24:41 STScI Edit Number: 2 Title Mapping the LyC-Emitting Regions of Local Galaxies ------------------------------------------------------------------------------------ Type Cycle GO 22 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Sally Oey University of Michigan Y CoI: Dr. Jesus Lopez-Hernandez University of Michigan N CoI: Dr. Bethan James University of Cambridge N CoI: Dr. Anne Jaskot Smith College N ------------------------------------------------------------------------------------ Abstract We propose to map the optically thin regions in the only two, known Lyman-continuum (LyC) emitting galaxies in the local universe, Haro 11 and Tol 1247-232. This will be done with the recently developed technique of ionization-parameter mapping (IPM), based on nebular emission-line imaging. We will use ACS/WFC and WFC3/UVIS to carry out narrow-band imaging in [O II] and [O III], as well as nearby continuum, where necessary. Together with existing data, our results will clarify the conditions for LyC emission and will yield more realistic estimates of the escape fraction of LyC radiation from these galaxies. ------------------------------------------------------------------------------------ Observations Description ------------------------ We plan to carry out ionization-parameter mapping with narrow-band imaging in [Oiii] 4959, 5007 and [Oii] 3727 for Haro 11 and Tol 1247-232. We will also require continuum imaging to generate continuum-subtracted, emission-line images. Haro 11 and Tol 1247-232 are redshifted to z = 0.0206 and 0.0480, respectively. The ACS ramp filters will allow us to tune the bandpasses to the necessary redshifted emission-line wavelengths, which is necessary for Tol 1247-232. Haro 11 is also accessible with WFC3 narrow-band filters, so we choose the instruments according to sensitivity. For the ACS ramp filters, FR505N is used for [Oiii] imaging, and its 2% bandpass corresponds to a width of about 100 A. This allows obtaining both [Oiii] 4959, 5007 simultaneously, while centering the bandpass to avoid H-beta 4861. We will use FR388N for [Oii] imaging of Tol 1247-232, and its 2% bandpass corresponds to about 78 A width. The nearest bright emission line is [Ne iii] 3869, which is too far to be a contamination concern. For Haro 11, we use WFC3/UVIS FQ378N, which similarly excludes [Ne iii]. The angular sizes of the target galaxies are only a few arcsec, so they will easily fit within the ramp filter monochromatic regions on the order of 30 arcsec diameter, which correspond to one ACS quadrant. We will therefore only require readout of the WFC1-MRAMPQ quadrant on ACS. Haro 11 similarly fits easily within a WFC/UVIS quadrant, as necessary for using the FQ378N quadrant filter. 13702( 5) - 22-Jan-2015 15:24:41 - [ 2] We can estimate our exposure times by scaling directly from the existing HST H-alpha observations. Haro 11 was observed by ACS/WFC FR656N for 680 s. We need to obtain a S/N = 10 in the outer, low surface-brightness regions in each of [Oii] and [Oiii]. This corresponds to surface brightness of about 5 x 10^-15 erg s^-1 cm^-2 arcsec^-2 , according to the ACS Ramp Filter ETC. For Haro 11, the measured reddening in Knot C implies that we need an additional factor of 1.2 in depth at [Oiii] relative to H-alpha (James et al. 2013). We can obtain the corresponding depth in 3 x 800 s in FR505N centered at 5110 A (1 ACS orbit). We compared with the WFC3/UVIS F508N, but find that ACS FR505N is more efficient. For [Oii] at 3803|A, however, WFC3 FQ378N is much more efficient than ACS FR388N. At [Oii], the aggregate reddening implies a factor of 1.5 deeper exposures than at H-alpha. Since we expect the reddening to be much lower in the outer, low surface-brightness regions, we aim for a factor of 1.3 deeper than the existing H-alpha data, since the sensitivity is so much worse at this wavelength. The corresponding depth can be achieved with 6 x 1200 s in WFC3 FQ378N (3 WFC3 orbits). The redshift of Tol 1247-232 requires using the ACS ramp filters. It turns out that this galaxy has the same reddening as Haro 11, Knot C (c(H-beta)=0.3; Terlevich et al. 1993), and so we request the same depth observations as for Haro 11 in both bands. For [Oiii], we again use ACS filter FR505N, now centered at 5247 A, with the same 2400-s exposure time (1 ACS orbit). For [Oii], we observe with FR388N for an exposure time of 10 x 1200 s, centered at 3906 A (5 ACS orbits). Thus, our emission-line observations require a total of 7 ACS orbits and 3 WFC3 orbits. We will need continuum observations that are uncontaminated by line emission to obtain the best continuum subtraction for our targeted emission-line observations. Note that we also plan to make use of the existing H-alpha observations, so we need to ensure that we will have continuum observations for these, too. There are sufficient existing HST continuum observations for Haro 11 in [Oiii]: 471 s in ACS/WFC F550M, which the ACS ETC shows is perfectly matched to the depth of our total proposed [Oiii] observations in FR505N. There is also a 600-s exposure in F775W by WFC3 for Tol 1247-232, which serves as continuum for H-alpha. The remaining bands will need either new or supplementary observations. The [Oii] continuum observations need to be obtained with the more blue-sensitive WFC3, since there is no U filter on ACS. We therefore propose to obtain all the other continuum data with this instrument. For Haro 11, the existing ACS/HRC F330W data are only 1/3 as deep as we require, and so we propose to obtain about 600 s x 2 with WFC3/UVIS in F336W. There are no suitable H-alpha continuum data for this galaxy, so we also will obtain about 300 s x 2 in F763M. For Tololo 1247-232, there is no available [Oiii] continuum, so we plan to obtain 300 s x 3 in F547M. The existing F336W data are also about 25% shallower than the depth needed, so we include an additional 900-s frame to supplement this. Thus we request 1 orbit for each galaxy using WFC3 to obtain continuum data. All multiple observations will be dithered. Our request totals 7 ACS orbits and 5 WFC3 orbits. ------------------------------------------------------------------------------------ 13702( 5) - 22-Jan-2015 15:24:41 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 HARO-11 GALAXY, DWARF COMPACT, RA=00H36M52.6992S, J2000 V = 13.8 +/- 0.2 5e-15 erg s-1 cm-2 STARBURST DEC=-33D33'16.99" arcsec-2 Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. Data confirmed and updated. Surface brightness represents desired depth for diffuse outer regions. ------------------------------------------------------------------------------------------------------------------------------------ 2 TOLOLO-1247- GALAXY, DWARF COMPACT, RA=12H50M18.9000S, J2000 V = 15.4 +/- 0.1 5e-15 erg s-1 cm-2 232 STARBURST DEC=-23D33'57.60" arcsec-2 Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. Data confirmed and updated. Surface brightness represents desired depth for diffuse outer regions. ------------------------------------------------------------------------------------------------------------------------------------ 13702( 5) - 22-Jan-2015 15:24:41 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE-3PT Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.135 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 3 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 4 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.265 Line_Spacing 0.187 Coordinate_Frame POS-TARG Pattern_Orient 20.67 Angle_Between_Sides 69.05 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13702( 5) - 22-Jan-2015 15:24:41 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 5 Primary_Pattern Secondary_Pattern Pattern_Type ACS-WFC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 3.011 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 85.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 13702( 5) - 22-Jan-2015 15:24:41 - [ 6] Visit: 01 Visit Requirements: 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HARO-11 ACS/WFC ACCUM WFC1-MRAM FR505N 5110 1 743 S PATTERN 5 1 P see below (2379 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 | ------------------------------------------------------------------------------------------------------------------------------------ HARO-11 1 ACS/WFC ACCUM WFC1-MRA FR505N 5110 1 none none none 1 793.0 S MP HARO-11 1 ACS/WFC ACCUM WFC1-MRA FR505N 5110 2 none none none 1 793.0 S MP HARO-11 1 ACS/WFC ACCUM WFC1-MRA FR505N 5110 3 none none none 1 793.0 S MP 13702( 5) - 22-Jan-2015 15:24:41 - [ 7] Visit: 02 Visit Requirements: 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HARO-11 WFC3/UVI ACCUM UVIS-QUAD FQ378N FLASH=12 2 1200 S PATTERN 2 1 S -SUB see below (8416 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 | ------------------------------------------------------------------------------------------------------------------------------------ HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 1 none 1 none 1 1366.0 S S D-SUB HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 1 none 2 none 1 1366.0 S S D-SUB HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 2 none 1 none 2 1421.0 S S D-SUB HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 2 none 2 none 2 1421.0 S S D-SUB HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 3 none 1 none 3 1421.0 S S D-SUB HARO-11 1 WFC3/UVI ACCUM UVIS-QUA FQ378N 3 none 2 none 3 1421.0 S S D-SUB 13702( 5) - 22-Jan-2015 15:24:41 - [ 8] Visit: 03 Visit Requirements: 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 HARO-11 WFC3/UVI ACCUM UVIS1-2K2 F763M FLASH=12 1 200 S PATTERN 2 1 S B-SUB see below (627 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 HARO-11 WFC3/UVI ACCUM UVIS1-2K2 F336W FLASH=12 1 435 S PATTERN 2 2 S B-SUB see below (1332 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 | ------------------------------------------------------------------------------------------------------------------------------------ HARO-11 1 WFC3/UVI ACCUM UVIS1-2K F763M 1 none none none 1 209.0 S S 2B-SUB HARO-11 1 WFC3/UVI ACCUM UVIS1-2K F763M 2 none none none 1 209.0 S S 2B-SUB HARO-11 1 WFC3/UVI ACCUM UVIS1-2K F763M 3 none none none 1 209.0 S S 2B-SUB HARO-11 2 WFC3/UVI ACCUM UVIS1-2K F336W 1 none none none 1 444.0 S S 2B-SUB HARO-11 2 WFC3/UVI ACCUM UVIS1-2K F336W 2 none none none 1 444.0 S S 2B-SUB HARO-11 2 WFC3/UVI ACCUM UVIS1-2K F336W 3 none none none 1 444.0 S S 2B-SUB 13702( 5) - 22-Jan-2015 15:24:41 - [ 9] Visit: 04 Visit Requirements: ORIENT 290D TO 324 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TOLOLO-1247 ACS/WFC ACCUM WFC1-MRAM FR505N 5247 1 735 S PATTERN 5 1 -232 P see below (2355 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR505N 5247 1 none none none 1 785.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR505N 5247 2 none none none 1 785.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR505N 5247 3 none none none 1 785.0 S MP 13702( 5) - 22-Jan-2015 15:24:41 - [ 10] Visit: 05 Visit Requirements: ORIENT 22D TO 70 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TOLOLO-1247 ACS/WFC ACCUM WFC1-MRAM FR388N 3906 2 1250 S PATTERN 4 1 -232 P see below (10742 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOLOLO-1247 ACS/WFC ACCUM WFC1-MRAM FR388N 3906 1 1200 S PATTERN 1 2 -232 P see below (2710 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 1 none 1 none 1 1270.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 1 none 2 none 1 1270.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 2 none 1 none 2 1367.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 2 none 2 none 2 1367.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 3 none 1 none 3 1367.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 3 none 2 none 3 1367.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 4 none 1 none 4 1367.0 S MP TOLOLO-1247-232 1 ACS/WFC ACCUM WFC1-MRA FR388N 3906 4 none 2 none 4 1367.0 S MP TOLOLO-1247-232 2 ACS/WFC ACCUM WFC1-MRA FR388N 3906 1 none none none 5 1355.0 S MP TOLOLO-1247-232 2 ACS/WFC ACCUM WFC1-MRA FR388N 3906 2 none none none 5 1355.0 S MP 13702( 5) - 22-Jan-2015 15:24:41 - [ 11] Visit: 06 Visit Requirements: 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 TOLOLO-1247 WFC3/UVI ACCUM UVIS1-2K2 F547M FLASH=12 1 300 S PATTERN 2 1 -232 S B-SUB see below (1095 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 TOLOLO-1247 WFC3/UVI ACCUM UVIS1-2K2 F336W FLASH=12 1 450 S PATTERN 3 2 -232 S B-SUB see below (1030 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 | ------------------------------------------------------------------------------------------------------------------------------------ TOLOLO-1247-232 1 WFC3/UVI ACCUM UVIS1-2K F547M 1 none none none 1 365.0 S S 2B-SUB TOLOLO-1247-232 1 WFC3/UVI ACCUM UVIS1-2K F547M 2 none none none 1 365.0 S S 2B-SUB TOLOLO-1247-232 1 WFC3/UVI ACCUM UVIS1-2K F547M 3 none none none 1 365.0 S S 2B-SUB TOLOLO-1247-232 2 WFC3/UVI ACCUM UVIS1-2K F336W 1 none none none 1 515.0 S S 2B-SUB TOLOLO-1247-232 2 WFC3/UVI ACCUM UVIS1-2K F336W 2 none none none 1 515.0 S S 2B-SUB 13702( 5) - 22-Jan-2015 15:24:41 - [ 12] Summary Form for Proposal 13702 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-QUAD-SUB, UVIS1-2K2B-SUB, WFC1-MRAMP ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 22D TO 70 D, ORIENT 290D TO 324 D, PATTERN 1 2, PATTERN 2 1, PATTERN 2 2, PATTERN 3 2, PATTERN 4 1, PATTERN 5 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F336W, F547M, F763M, FQ378N, FR388N, FR505N ------------------------------------------------------------------------------------------------------------------------------------ Target Names HARO-11, TOLOLO-1247-232 ------------------------------------------------------------------------------------------------------------------------------------