12233( 4) - 11-Aug-2010 12:57:06 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 12233 Version: 4 Check-in Time: 11-Aug-2010 12:57:06 STScI Edit Number: 0 Title Strong Gravitational Lensing by Quasars ------------------------------------------------------------------------------------ Type Cycle GO 18 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Frederic Courbin Ecole Polytechnique Federale de Lausanne CoI: Prof. Georges Meylan Ecole Polytechnique Federale de Lausanne N CoI: Prof. George Djorgovski California Institute of Technology Y CoI: Mr. Malte Tewes Ecole Polytechnique Federale de Lausanne N CoI: Dr. Ashish Mahabal California Institute of Technology N CoI: Dr. Pascale Jablonka Observatoire de Geneve N CoI: Prof. Pierre Magain Universite de Liege N CoI: Dr. Dominique Sluse Astronomisches Rechen-Institut Heidelberg N ------------------------------------------------------------------------------------ Abstract The title is correct: we propose to confirm low redshift quasars acting as strong gravitational lenses on background emission line galaxies. Our sample is selected from 22, 298 SDSS spectra of quasars with z < 0.7. Using cross-correlation techniques, we identify 10-15 quasars that have at least two emission lines in their background, among [OII], H beta and the [OIII] doublet. Four of our quasars have all four lines clearly visible in their background. We propose to confirm the lensing nature of these objects with WFC3/UVIS images in the F475W and F814W filters, and to constrain lens models of the quasar host galaxies. Our sample is similar to the SLACS sample of strong lenses, but with quasar host galaxies as lenses. As these galaxies are massive, we expect that most of the background objects will be strongly lensed (as in SLACS), displaying well visible arcs and multiple images within 1-2 arcsec. We propose to obtain sharp images of our targets along with clean PSF. With image deconvolution techniques, we shall remove the quasar and its host galaxy and we shall measure the size and shape of the background Einstein Ring allowing, for the first time, to weigh directly quasar host galaxies and to measure their total radial mass profile with strong gravitational lensing. ------------------------------------------------------------------------------------ Observations Description ------------------------ This 9-orbit program proposes to obtain deep WFC3 F475W and F814W images of 4 low redshift QSOs acting as strong gravitational lenses on background emission-line galaxies. The goal is to obtain detailed images of the lensed Eintein rings produced by the 4 QSOs in order to study the mass distribution in the QSO host galaxies. For each object, we use one orbit per filter (2 orbits per visit), and use 6 exposures per orbit. The dither pattern is a line with 6 exposures with the first exposure centered on the center of UVIS1. One full orbit is used to measure the PSF of the HST in the two filters in the same observing conditions as the QSOs. The PSF will be used for deconvolution 12233( 4) - 11-Aug-2010 12:57:06 - [ 2] purposes. The field chosen is the open cluster NGC 136. The orbit is divided in 8 exposures: 1x60s + 3x350s in F475W followed by 1x60s + 3x350s in F814W Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 12233( 4) - 11-Aug-2010 12:57:06 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ1005+40 GALAXY, QSO RA=10H05M22.0600S +/- 0.1", J2000 V = 17.2 16 DEC=+40D16'10.13" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ0013+15 GALAXY, QSO RA=00H13M40.2100S +/- 0.1", J2000 V = 18.0 23 DEC=+15D23'12.05" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 3 SDSSJ0919+27 GALAXY, QSO RA=09H19M26.2200S +/- 0.1", J2000 V = 18.0 20 DEC=+27D20'50.97" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 4 PSF-STARS-NG STELLAR CLUSTER, OPEN RA=00H31M23.0000S +/- 0.1", J2000 V = 15.0 C136 CLUSTER DEC=+61D29'47.00" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 5 SDSSJ0827+52 GALAXY, QSO RA=08H27M25.2000S +/- 0.1", J2000 V = 17.5 24 DEC=+52D24'35.12" +/- 0.1" Reference Frame: ICRS Comments: ------------------------------------------------------------------------------------------------------------------------------------ 12233( 4) - 11-Aug-2010 12:57:06 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-DITHER-LINE Pattern_Purpose DITHER Number_Of_Points 6 Point_Spacing 0.145 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 4 Point_Spacing 0.145 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 46.84 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 12233( 4) - 11-Aug-2010 12:57:06 - [ 5] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ1005+4 WFC3/UVI ACCUM UVIS1 F475W 1 390 S PATTERN 1 1 016 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ1005+4 WFC3/UVI ACCUM UVIS1 F814W 1 390 S PATTERN 1 2 016 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 393.0 S S SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 393.0 S S SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 393.0 S S SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 393.0 S S SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 5 none none none 1 393.0 S S SDSSJ1005+4016 1 WFC3/UVI ACCUM UVIS1 F475W 6 none none none 1 393.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 2 411.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 2 411.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 2 411.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 2 411.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 5 none none none 2 411.0 S S SDSSJ1005+4016 2 WFC3/UVI ACCUM UVIS1 F814W 6 none none none 2 411.0 S S 12233( 4) - 11-Aug-2010 12:57:06 - [ 6] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ0013+1 WFC3/UVI ACCUM UVIS1 F475W 1 375 S PATTERN 1 1 523 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ0013+1 WFC3/UVI ACCUM UVIS1 F814W 1 375 S PATTERN 1 2 523 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 378.0 S S SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 378.0 S S SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 378.0 S S SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 378.0 S S SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 5 none none none 1 378.0 S S SDSSJ0013+1523 1 WFC3/UVI ACCUM UVIS1 F475W 6 none none none 1 378.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 2 396.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 2 396.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 2 396.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 2 396.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 5 none none none 2 396.0 S S SDSSJ0013+1523 2 WFC3/UVI ACCUM UVIS1 F814W 6 none none none 2 396.0 S S 12233( 4) - 11-Aug-2010 12:57:06 - [ 7] 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ0919+2 WFC3/UVI ACCUM UVIS1 F475W 1 375 S PATTERN 1 1 720 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ0919+2 WFC3/UVI ACCUM UVIS1 F814W 1 375 S PATTERN 1 2 720 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 379.0 S S SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 379.0 S S SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 379.0 S S SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 379.0 S S SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 5 none none none 1 379.0 S S SDSSJ0919+2720 1 WFC3/UVI ACCUM UVIS1 F475W 6 none none none 1 379.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 2 397.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 2 397.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 2 397.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 2 397.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 5 none none none 2 397.0 S S SDSSJ0919+2720 2 WFC3/UVI ACCUM UVIS1 F814W 6 none none none 2 397.0 S S 12233( 4) - 11-Aug-2010 12:57:06 - [ 8] Visit: 04 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 SDSSJ0827+5 WFC3/UVI ACCUM UVIS1 F475W 1 405 S PATTERN 1 1 224 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 SDSSJ0827+5 WFC3/UVI ACCUM UVIS1 F814W 1 405 S PATTERN 1 2 224 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 | ------------------------------------------------------------------------------------------------------------------------------------ SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 410.0 S S SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 410.0 S S SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 410.0 S S SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 410.0 S S SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 5 none none none 1 410.0 S S SDSSJ0827+5224 1 WFC3/UVI ACCUM UVIS1 F475W 6 none none none 1 410.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 2 429.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 2 429.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 2 429.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 2 429.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 5 none none none 2 429.0 S S SDSSJ0827+5224 2 WFC3/UVI ACCUM UVIS1 F814W 6 none none none 2 429.0 S S 12233( 4) - 11-Aug-2010 12:57:06 - [ 9] Visit: 05 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| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 PSF-STARS-N WFC3/UVI ACCUM UVIS1 F475W 1 60 S PATTERN 3 1 GC136 S see below ------------------------------------------------------------------------------------------------------------------------------------ 2 PSF-STARS-N WFC3/UVI ACCUM UVIS1 F814W 1 60 S PATTERN 3 2 GC136 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 | ------------------------------------------------------------------------------------------------------------------------------------ PSF-STARS-NGC136 1 WFC3/UVI ACCUM UVIS1 F475W 1 none none none 1 64.0 S S PSF-STARS-NGC136 1 WFC3/UVI ACCUM UVIS1 F475W 2 none none none 1 354.0 S S PSF-STARS-NGC136 1 WFC3/UVI ACCUM UVIS1 F475W 3 none none none 1 354.0 S S PSF-STARS-NGC136 1 WFC3/UVI ACCUM UVIS1 F475W 4 none none none 1 354.0 S S PSF-STARS-NGC136 2 WFC3/UVI ACCUM UVIS1 F814W 1 none none none 1 354.0 S S PSF-STARS-NGC136 2 WFC3/UVI ACCUM UVIS1 F814W 2 none none none 1 354.0 S S PSF-STARS-NGC136 2 WFC3/UVI ACCUM UVIS1 F814W 3 none none none 1 354.0 S S PSF-STARS-NGC136 2 WFC3/UVI ACCUM UVIS1 F814W 4 none none none 1 64.0 S S 12233( 4) - 11-Aug-2010 12:57:06 - [ 10] Summary Form for Proposal 12233 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1, PATTERN 1 2, PATTERN 3 1, PATTERN 3 2 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F475W, F814W ------------------------------------------------------------------------------------------------------------------------------------ Target Names PSF-STARS-NGC136, SDSSJ0013+1523, SDSSJ0827+5224, SDSSJ0919+2720, SDSSJ1005+4016 ------------------------------------------------------------------------------------------------------------------------------------