10925( 5) - 03/15/07 13:56 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10925 Version: 5 Check-in Time: 15-Mar-2007 17:56:05 STScI Edit Number: 0 Title Imaging the Nearest Damped Lyman Alpha Absorbers ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 15 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. John T. Stocke University of Colorado at Boulder CoI: Mr. Brian Keeney University of Colorado at Boulder N CoI: Dr. Chris Carilli Associated Universities, Inc. N CoI: Dr. Charles Danforth University of Colorado at Boulder N ------------------------------------------------------------------------------------ Abstract We propose to acquire broad-band and H-alpha imaging of three bright, very nearby host galaxies for damped Ly-alpha absorbers (DLAs). Our targets are the only DLA hosts at z < 0.03 (i.e., spatial resolutions of < 1.2 kpc). The purpose of these observations is to discover the detailed morphology and kinematics and thus the origins of the gas giving rise to DLAs. While ground-based spectroscopy of DLAs is used to infer indirectly the evolution of galaxy metallicity and thick disk kinematics out to z > 4, only with HST imaging of the very lowest redshift DLA galaxies can we discover these relationships directly. In conjunction with H I 21-cm VLA emission maps, broad-band and H-alpha images of these DLAs will allow us to determine: (1) the sites of active star formation in the host galaxies and their relationship to the QSO sightline, (2) the presence of stellar streams, supernova shells, or bipolar "superwind" outflows in DLA host galaxies, and (3) the detailed spiral structure of the host galaxies, which will allow us to use the lower resolution H I 21-cm emission line images to determine unambiguous DLA kinematics with respect to the host galaxy (i.e., is the DLA rotating with the disk?). Thus, the high resolution imaging will allow us to correctly interpret the kinematics and metallicity information provided by the H I 21-cm VLA maps and HST UV spectroscopy to better inform the high-z results. ------------------------------------------------------------------------------------ 10925( 5) - 03/15/07 13:56 - [ 2] Observations Description ------------------------ This program requires broadband and Halpha imaging of 3 bright nearby (V < 15:5; z < 0:03) galaxies. Whenever possible, we will use ACS/WFC for these observations in order to take advantage of the higher throughput and resolution of ACS as compared to WFPC2, as well as its larger FOV. We will CR-SPLIT and dither all broadband observations to more efficiently reject cosmic rays and improve sub-pixel resolution, but the narrowband observations will not be CR- SPLIT to minimize read-noise. Halpha imaging of our closest target, NGC3067 (cz=1465 km/s), will be acquired using ACS/WFC with the F660N filter. Two orbits will be required for H imaging of this target and one orbit for the broadband (1500 s each in F435W and F775W). This total Halpha integration time of 2 orbits will allow us to reach comparable depth to the Cecil et al. (2001) F658N image of NGC3079, whose Halpha integration time was 4 orbits with WFPC2. Thus, if the same ?superbubble? structures are present in NGC3067 as in NGC3079, we expect to detect them easily with the proposed images. Unfortunately, there is no narrowband filter in either ACS or WFPC2 that will allow us to image Halpha at its redshifted wavelength of 6680A for ESO1327?2041 (cz=5370 km/s); therefore, we will observe ESO 1327?2041 in 3 broadband filters (F435W, F625W, F775W) with ACS/WFC. Five orbits will be required for this broadband imaging (1 orbit in F435W and 2 orbits each in F625W and F775W) so that emission line gas present in the difference image (F625W-F775W) is detected with signal-to-noise >15 per resolution element. This signal-to-noise limit will allow us to clearly detect emission line filaments in the difference image and measure their surface brightness distribution. Ground-based H imaging at 1-arcsec resolution will be used to isolate the regions where H emission is expected in the HST images. Halpha imaging of our last target, Klemola 31A (cz=8605 km/s), will be obtained with WFPC2 and the F673N filter. We will also acquire a broadband F791W image for continuum subtraction and a broadband F439W image to locate the sites of active star formation in this galaxy. A total of five orbits will be required for this target, one orbit each for the F439W and F791W images and three orbits for Halpha. These integration times will allow us to detect unresolved H II regions with L(Halpha)>10^37 ergs/s and perform accurate (<0.1 mag) photometry on individual H II regionswith L(Halpha)>6x10^37 ergs/s, corresponding to a star formation rate of >0.001 M/yr. While the detectability of an individual filamentary structure depends critically on its geometry and spatial extent, these exposure times have been computed assuming a geometry intermediate between well-resolved at all redshifts (i.e., constant surface brightness for z<<1) and unresolved at all redshifts (surface brightness propto 1/r^2). Thus, we request a total of 13 orbits of ACS and WFPC2 imaging for our three target galaxies. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- 10925( 5) - 03/15/07 13:56 - [ 3] ------------------------------------------------------------------------------------ 10925( 5) - 03/15/07 13:56 - [ 4] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-3067 GALAXY, HALO, LYMAN RA=09H58M21.7258S +/- 0.1", J2000 V = V = 12.1+/-0.1 ALPHA CLOUD DEC=+32D23'2.85" +/- 0.1" 1465.0 Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. 2 ESO-1327-- GALAXY, HALO, LYMAN RA=13H30M6.5000S +/- 0.1", DEC=- J2000 V = V = 14.0+/-0.2 2041 ALPHA CLOUD, SPIRAL 20D56'7.00" +/- 0.1" 5370.0 Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. 3 KLEMOLA-31A GALAXY, HALO, LYMAN RA=20H23M46.2238S +/- 0.1", J2000 V = V = 15.3+/-0.2 ALPHA CLOUD, SPIRAL DEC=-36D55'20.11" +/- 0.1" 8605.0 Reference Frame: Other: NED Comments: This object was generated by the targetselector and retrieved from the NED database. 10925( 5) - 03/15/07 13:56 - [ 5] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 2.121 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 45.0 Angle_Between_Sides Center_Pattern NO Pattern_Comments: 15 WF pixel shift in both x and y ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 2.121 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 45.0 Angle_Between_Sides Center_Pattern NO Pattern_Comments: 15 WF pixel shift in both x and y ------------------------------------------------------------------------------------------------------------------------------------ 10925( 5) - 03/15/07 13:56 - [ 6] Visit: 01 Visit Priority: Visit Requirements: ORIENT 35.0D TO 100.0 D; ORIENT 245.0D TO 300.0 D On Hold Comments: Additional Comments: NGC3067 Continuum Obs (now WFPC2) Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-3067 WFPC2 IMAGE WFALL-FIX F450W 1 1000 S PATTERN 2 1-2 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 NGC-3067 WFPC2 IMAGE WFALL-FIX F791W 1 1000 S see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 1 none none 1 1 400.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 1 none none 2 1 400.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 2 none none 1 2 400.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 2 none none 2 2 400.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 3 none none 1 3 400.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F450W 3 none none 2 3 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 1 none none 1 1 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 1 none none 2 1 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 2 none none 1 2 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 2 none none 2 2 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 3 none none 1 3 400.0 S X NGC-3067 2 WFPC2 IMAGE WFALL-FI F791W 3 none none 2 3 400.0 S X 10925( 5) - 03/15/07 13:56 - [ 7] Visit: 02 Visit Priority: Visit Requirements: On Hold Comments: Additional Comments: ESO1327 Obs (now WFPC2) Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 ESO-1327--2 WFPC2 IMAGE WF3 F675W 1 2000 S PATTERN 2 1 041 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 ESO-1327--2 WFPC2 IMAGE WF3 F450W 1 4000 S PATTERN 2 2-3 041 see below ------------------------------------------------------------------------------------------------------------------------------------ 3 ESO-1327--2 WFPC2 IMAGE WF3 F791W 1 4000 S 041 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 1 none none 1 1 700.0 S ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 1 none none 2 1 700.0 S ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 2 none none 1 1 700.0 S ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 2 none none 2 2 700.0 S ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 3 none none 1 2 700.0 S ESO-1327--2041 1 WFPC2 IMAGE WF3 F675W 3 none none 2 2 700.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 1 none none 1 3 400.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 1 none none 2 3 400.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 2 none none 1 4 400.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 2 none none 2 4 400.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 3 none none 1 5 400.0 S ESO-1327--2041 2 WFPC2 IMAGE WF3 F450W 3 none none 2 5 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 1 none none 1 3 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 1 none none 2 3 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 2 none none 1 4 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 2 none none 2 4 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 3 none none 1 5 400.0 S ESO-1327--2041 3 WFPC2 IMAGE WF3 F791W 3 none none 2 5 400.0 S 10925( 5) - 03/15/07 13:56 - [ 8] Visit: 03 Visit Priority: Visit Requirements: ORIENT 0.0D TO 13.0 D; ORIENT 24.0D TO 50.0 D; ORIENT 75.0D TO 86.0 D; ORIENT 120.0D TO 176.0 D; ORIENT 187.0D TO 270.0 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 KLEMOLA-31A WFPC2 IMAGE WFALL F439W 1 2000 S PATTERN 1 1-2 see below ------------------------------------------------------------------------------------------------------------------------------------ 2 KLEMOLA-31A WFPC2 IMAGE WFALL F791W 1 2000 S see below ------------------------------------------------------------------------------------------------------------------------------------ 3 KLEMOLA-31A WFPC2 IMAGE WFALL F673N 1 6000 S PATTERN 2 3 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ KLEMOLA-31A 1 WFPC2 IMAGE WFALL F439W 1 none none 1 1 400.0 S KLEMOLA-31A 1 WFPC2 IMAGE WFALL F439W 1 none none 2 1 400.0 S KLEMOLA-31A 1 WFPC2 IMAGE WFALL F439W 2 none none 1 2 400.0 S KLEMOLA-31A 1 WFPC2 IMAGE WFALL F439W 2 none none 2 2 400.0 S KLEMOLA-31A 2 WFPC2 IMAGE WFALL F791W 1 none none 1 1 400.0 S KLEMOLA-31A 2 WFPC2 IMAGE WFALL F791W 1 none none 2 1 400.0 S KLEMOLA-31A 2 WFPC2 IMAGE WFALL F791W 2 none none 1 2 400.0 S KLEMOLA-31A 2 WFPC2 IMAGE WFALL F791W 2 none none 2 2 400.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 1 none none 1 3 1200.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 1 none none 2 3 1200.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 2 none none 1 4 1200.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 2 none none 2 4 1200.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 3 none none 1 5 1200.0 S KLEMOLA-31A 3 WFPC2 IMAGE WFALL F673N 3 none none 2 5 1200.0 S 10925( 5) - 03/15/07 13:56 - [ 9] Visit: 04 Visit Priority: Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: NGC3067 Ha obs #1 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-3067 WFPC2 IMAGE WFALL-FIX F658N 1 7200 S PATTERN 2 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 1 none none 1 1 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 1 none none 2 1 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 2 none none 1 2 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 2 none none 2 2 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 3 none none 1 3 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 3 none none 2 3 1200.0 S X 10925( 5) - 03/15/07 13:56 - [ 10] Visit: 05 Visit Priority: Visit Requirements: SAME ORIENT AS 01 On Hold Comments: Additional Comments: NGC3067 Ha obs #2 Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 NGC-3067 WFPC2 IMAGE WFALL-FIX F658N 1 7200 S PATTERN 2 1 see below ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 1 none none 1 1 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 1 none none 2 1 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 2 none none 1 2 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 2 none none 2 2 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 3 none none 1 3 1200.0 S X NGC-3067 1 WFPC2 IMAGE WFALL-FI F658N 3 none none 2 3 1200.0 S X 10925( 5) - 03/15/07 13:56 - [ 11] Summary Form for Proposal 10925 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures WFALL-FIX WF3 WFALL ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFPC2 ------------------------------------------------------------------------------------------------------------------------------------ Opmodes IMAGE ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 35.0D TO 100.0 D; ORIENT 245.0D TO 300.0 D; PATTERN 2 1-2; PATTERN 2 1; PATTERN 2 2-3; ORIENT 0.0D TO 13.0 D; ORIENT 24.0D TO 50.0 D; ORIENT 75.0D TO 86.0 D; ORIENT 120.0D TO 176.0 D; ORIENT 187.0D TO 270.0 D; PATTERN 1 1-2; PATTERN 2 3; SAME ORIENT AS 01; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F450W F791W F675W F439W F673N F658N ------------------------------------------------------------------------------------------------------------------------------------ Target Names NGC-3067 ESO-1327--2041 KLEMOLA-31A ------------------------------------------------------------------------------------------------------------------------------------