15324( 3) - 18-Jul-2017 17:48:53 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15324 Version: 3 Check-in Time: 18-Jul-2017 17:48:53 STScI Edit Number: 1 Title Imaging the Lenses in the Quintuple Gravitational Lens PMN J0134-0931 ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Tommy Wiklind Catholic University of America Y CoI: Dr. Anton M. Koekemoer Space Telescope Science Institute N CoI: Ms. Emmaris Soto Catholic University of America N CoI: Dr. Francoise Combes Observatoire de Paris N CoI: Dr. Nissim Kanekar National Centre for Radio Astrophysics, N TIFR ------------------------------------------------------------------------------------ Abstract The gravitational lens PMN J0134-0931 is one of only two known non-cluster lenses producing six images of the background source. In this case the source is a quasar located at z=2.2 and the lens plane at z=0.76. It is likely that a small compact group of galaxies are located in the lens plane. The lens modeling for these six-image systems has, however, proven to be extraordinarily complicated and no satisfactory lens model has been produced for this system. PMN J0194-0931 is also unique in the sense that it is one of only two cases where molecular absorption lines are seen against two or more background images, the other one being PKS1830-211. The absorption lines make it possible to probe the kinematics of the lensing galaxies on sub-kpc scales and to determine kinematically derived total masses. Comparing with the mass derived from lens models, it provides a test of the assumed dark matter halo profile. In order to use the absorption lines to constrain the rotation curve it is necessary to know where the sigh lines cross the galaxies, the galaxy center and their inclination. The goal with this proposal is to image the galaxies at z=0.76 that lens the background quasar PMN J0134-0931. At optical and near-infrared wavelengths the highly magnified background quasar dominates the light. Attempts to subtract the quasar light has not produced useable results. We propose to observe PMN J0134-0931 at a wavelength short of the redshifted Lyman limit of the background quasar. This ensures that the quasar is essentially "turned off". This can be accomplished by using the WFC3/F275W filter. The lensing galaxies will be observed in restframe 1500A. ------------------------------------------------------------------------------------ Observations Description ------------------------ This observation consists of imaging of the lens in a gravitational lens system using WFC3/UVIS F275W. At this wavelenght the light from the background QSO is all but extinguished. The exposure time is estimated based on a L* galaxy at the redshift of the lens (z=0.765), but is uncertain. A S/N of 20 should be reached in 7200 sec. 15324( 3) - 18-Jul-2017 17:48:53 - [ 2] The setup is a simple imaging observation. Getting as much exposure time as possible (given the uncertain magnitude of the lens galax(ies)). The angular extent of the lens system is ~2-3". A pre-flash is needed as there are only faint objects in the field of view. The observation is contained in a single visit. ------------------------------------------------------------------------------------ 15324( 3) - 18-Jul-2017 17:48:53 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 QSO-B0132-09 GALAXY, GRAVITATIONAL RA=01H34M35.6608S, J2000 V = 22.7 7 LENS DEC=-09D31'2.94" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15324( 3) - 18-Jul-2017 17:48:53 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type WFC3-UVIS-MOS-DITH-LINE WFC3-UVIS-MOS-DITH-LINE Pattern_Purpose MOSAIC DITHER Number_Of_Points 3 2 Point_Spacing 2.4 0.119 Line_Spacing Coordinate_Frame POS-TARG POS-TARG Pattern_Orient 85.754 33.606 Angle_Between_Sides Center_Pattern YES NO ------------------------------------------------------------------------------------------------------------------------------------ 15324( 3) - 18-Jul-2017 17:48:53 - [ 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| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 QSO-B0132-0 WFC3/UVI ACCUM UVIS2-C1K F275W FLASH=10 1 500 S PATTERN 1 1 97 S 1C-CTE see below (8410 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 | ------------------------------------------------------------------------------------------------------------------------------------ QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 1 1 none none 1 1365.0 S S K1C-CTE QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 1 2 none none 1 1365.0 S S K1C-CTE QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 2 1 none none 2 1420.0 S S K1C-CTE QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 2 2 none none 2 1420.0 S S K1C-CTE QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 3 1 none none 3 1420.0 S S K1C-CTE QSO-B0132-097 1 WFC3/UVI ACCUM UVIS2-C1 F275W 3 2 none none 3 1420.0 S S K1C-CTE 15324( 3) - 18-Jul-2017 17:48:53 - [ 6] Summary Form for Proposal 15324 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2-C1K1C-CTE ------------------------------------------------------------------------------------------------------------------------------------ Configurations WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=10 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PATTERN 1 1 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F275W ------------------------------------------------------------------------------------------------------------------------------------ Target Names QSO-B0132-097 ------------------------------------------------------------------------------------------------------------------------------------