10570( 4) - 12/01/06 10:00 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 10570 Version: 4 Check-in Time: 01-Dec-2006 14:59:53 STScI Edit Number: 1 Title Hosts of Quasars with Opaque Partial Covering ------------------------------------------------------------------------------------ Type Cycle Parallel Pointing Tolerance GO 14 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Makoto Kishimoto University of Edinburgh, Institute for Astronomy CoI: Dr. Robert Antonucci University of California - Santa Barbara N CoI: Dr. Frederick W. Hamann University of Florida N CoI: Dr. Thomas Barlow California Institute of Technology N CoI: Dr. Ross McLure Royal Observatory Edinburgh N ------------------------------------------------------------------------------------ Abstract A few quasars are known to exhibit associated absorption lines with opaque partial covering. These are the lines which are clearly saturated but not completely dark, so that these absorbing clouds are opaquely and partially covering the quasar light. In some cases, ionization parameter and density arguments indicate that the absorbers are on kpc scale. This implies that at least in some cases, the residual, unabsorbed optical (rest-UV) continuum component originates from ~kpc scales, rather than microscopic scales (such as ~100 Schwarzschild radii). This could be a superluminous host galaxy or starbursting core, and could be resolved by HST. We address the nature of these opaquely and partially covered quasars with a simple and robust ACS imaging. ------------------------------------------------------------------------------------ 10570( 4) - 12/01/06 10:00 - [ 2] Observations Description ------------------------ We image the quasar Q0449-135 with ACS/HRC using the narrow band filter F502N, which accidentally falls at the opaque partial covering absorption doublet lines NV1240. This will greatly enhance the contrast of the underlying ``residual'' continuum at these lines to the other component of the quasar light which is thought to be compact. We will use the HRC to get critical spatial sampling. Since we want to measure the quasar's PSF core to look for any extension, we will take a short exposure image of a star to measure the size of the core of the PSF just before and after the quasar observation. While the HST focus vary within the observation of three orbits, the PSF core FWHM will not change significantly (the larger effect is a change in the core/wing flux ratio; John Krist, p.c.). The two sets of the PSF star observations will be combined to achieve the necessary S/N, but also will be used to double-check the stability of the PSF core. The PSF star will be the one with B=15.2mag at ~80'' from the target. Since the slew from the star to the target is small, pointing-dependent focus change will be insignificant (John Krist, p.c.). We use the same narrow-band filter (F502N) for the PSF star observation, so that the color difference between the star and target will not be a problem. In the first orbit, we will take a 13min exposure with 2 integer-pixel dither positions (for removing CR hits and hot pixels) for the PSF star and a 29min exposure with 2 integer-pixel dither positions for the target, with 13min overhead out of the visibility period 55min. Then in the second orbit, we will take a 45min exposure with 3 integer-pixel dither positions for the target, with the overhead 10min. The third orbit will be essentially idential with the first orbit except that the exposure for the PSF star will be at the end of the orbit: 30min for the target, 13min exposure for the star, 12min overhead. (Total exposure time for the target = 104min; PSF star = 26min; overhead = 35min.) We estimate that the target gives 26 cts/sec. The PSF star is ~16 times brighter than this. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10570( 4) - 12/01/06 10:00 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 Q0449-135 GALAXY, STARBURST, HIGH RA=04H51M42.5690S +/- 1", DEC=- J2000 V = 18.2+/-0.2 REDSHIFT GALAXY, QSO 13D20'47.19" +/- 1", PLATE- ID=03Y9 Coordinate Source: GSC_SURVEY_PLATE 2 STAR-045139- CALIBRATION, POINT RA=04H51M39.4800S +/- 1", DEC=- J2000 V = 14.9+/-0.4 131945 SPREAD FUNCTION 13D19'44.67" +/- 1", PLATE- ID=03Y9 Coordinate Source: GSC_SURVEY_PLATE 3 Q0449-135- GALAXY, STARBURST, HIGH RA=04H51M42.5690S +/- 1", DEC=- J2000 V = 18.2+/-0.2 COPY REDSHIFT GALAXY, QSO 13D20'47.19" +/- 1", PLATE- ID=03Y9 Coordinate Source: GSC_SURVEY_PLATE 4 STAR-045139- CALIBRATION, POINT RA=04H51M39.4800S +/- 1", DEC=- J2000 V = 14.9+/-0.4 131945-COPY SPREAD FUNCTION 13D19'44.67" +/- 1", PLATE- ID=03Y9 Coordinate Source: GSC_SURVEY_PLATE 10570( 4) - 12/01/06 10:00 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-HRC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.198 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type ACS-HRC-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 3 Point_Spacing 0.198 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 44.28 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10570( 4) - 12/01/06 10:00 - [ 5] Visit: 01 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30% 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 STAR-045139 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 390 S PATTERN 1 1 -131945 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q0449-135 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 855 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 Q0449-135 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 900 S PATTERN 2 3 ------------------------------------------------------------------------------------------------------------------------------------ 4 Q0449-135 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 900 S PATTERN 1 4 ------------------------------------------------------------------------------------------------------------------------------------ 5 STAR-045139 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 390 S PATTERN 1 5 -131945 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A Q0449-135 2 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A Q0449-135 2 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A Q0449-135 3 ACS/HRC ACCUM HRC F502N 1 none none none 2 N/A Q0449-135 3 ACS/HRC ACCUM HRC F502N 2 none none none 2 N/A Q0449-135 3 ACS/HRC ACCUM HRC F502N 3 none none none 2 N/A Q0449-135 4 ACS/HRC ACCUM HRC F502N 1 none none none 3 N/A Q0449-135 4 ACS/HRC ACCUM HRC F502N 2 none none none 3 N/A STAR-045139-131945 5 ACS/HRC ACCUM HRC F502N 1 none none none 3 N/A STAR-045139-131945 5 ACS/HRC ACCUM HRC F502N 2 none none none 3 N/A 10570( 4) - 12/01/06 10:00 - [ 6] Visit: 51 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30% On Hold Comments: Additional Comments: This is for the repeat of the orbit 1 of Visit 01. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 STAR-045139 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 390 S PATTERN 1 1 -131945 ------------------------------------------------------------------------------------------------------------------------------------ 2 Q0449-135 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 855 S PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A Q0449-135 2 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A Q0449-135 2 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A 10570( 4) - 12/01/06 10:00 - [ 7] Visit: A1 Visit Priority: Visit Requirements: PCS MODE FINE; SCHED 30% On Hold Comments: Additional Comments: This is for the repeat of the orbit 1 of Visit 01. Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 STAR-045139 ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 390 S PATTERN 1 1 -131945-COP Y ------------------------------------------------------------------------------------------------------------------------------------ 2 Q0449-135-C ACS/HRC ACCUM HRC F502N CR-SPLIT=NO 1 855 S PATTERN 1 2 OPY ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A -COPY STAR-045139-131945 1 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A -COPY Q0449-135-COPY 2 ACS/HRC ACCUM HRC F502N 1 none none none 1 N/A Q0449-135-COPY 2 ACS/HRC ACCUM HRC F502N 2 none none none 1 N/A 10570( 4) - 12/01/06 10:00 - [ 8] Summary Form for Proposal 10570 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures HRC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/HRC ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE; SCHED 30%; PATTERN 1 1; PATTERN 1 2; PATTERN 2 3; PATTERN 1 4; PATTERN 1 5; ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F502N ------------------------------------------------------------------------------------------------------------------------------------ Target Names STAR-045139-131945 Q0449-135 STAR-045139-131945-COPY Q0449-135-COPY ------------------------------------------------------------------------------------------------------------------------------------