14671( 3) - 29-Aug-2016 20:10:25 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 14671 Version: 3 Check-in Time: 29-Aug-2016 20:10:25 STScI Edit Number: 0 Title An HST proper-motion and spectral study of the optical jet in 4C +00.58 ------------------------------------------------------------------------------------ Type Cycle GO 24 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Eileen T Meyer University of Maryland Baltimore County Y CoI: Dr. Markos Georganopoulos University of Maryland Baltimore County N CoI: Dr. Edmund Hodges-Kluck University of Michigan N CoI: Dr. William B. Sparks Space Telescope Science Institute N CoI: Dr. Marco Chiaberge Space Telescope Science Institute - ESA N CoI: Dr. Roeland P. van der Marel Space Telescope Science Institute N CoI: Dr. Jay Anderson Space Telescope Science Institute N CoI: Prof. Eric S. Perlman Florida Institute of Technology N ------------------------------------------------------------------------------------ Abstract We have recently discovered a remarkably detailed optical jet in the nearby radio galaxy 4C 00.58, which we consider a 'moderate power' hybrid-source analog to the archetypal jets M87 and 3C 273. The unusual 'X-shaped' large-scale radio morphology of this source is thought to be the result of a recent merger-induced reorientation, and the jet displays a remarkable series of 'cannonball' ejections clearly detected in radio through X-rays. The clarity of the optical features and nearness of the source make it an ideal target for a prospective HST proper-motions study. Previous HST proper-motion studies which revealed superluminal motions in M87 and 3C 264 relied on archival WFPC2 observations and long observing baselines. With the high astrometric precision possible with an all-ACS/WFC imaging study, we can reach 0.5c accuracy with a time baseline of 4 years, requiring only a single additional orbit in cycles 24 and 26, in combination with our existing ACS/WFC imaging from 2015. We also request complimentary near-UV observations (WFC3/UVIS F225W) in order to map the spectral evolution of the knots and hotspot and allow better constraints on the emission mechanisms and physical parameters in the jet. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is an imaging project for the optical jet located in nearby elliptical galaxy 4C +00.58. The ACS/WFC F606W observations are identical in setup to the first successful imaging done in cycle 22. The current (cycle 24) and future (cycle 26) imaging in the F606W filter are part of a proper-motions monitoring project. In addition, two orbits of WFC3/UVIS imaging in F225W are planned for cycle 24, in order to measure the synchrotron spectrum of the resolved knots in the jet. For the ACS/WFC imaging, we use a 5-point dithering pattern which covers the chip gap, optimized to sample the PSF. ORIENT constraints are included as a caution against possible saturation spikes from the bright quasar core over-running the jet. While the core was not saturated in previous imaging with similar exposure times, quasar cores are known to be variable. 14671( 3) - 29-Aug-2016 20:10:25 - [ 2] For the WFC3/UVIS imaging, we have split the 2 orbits into 6 total exposures of about 900 seconds. The exact UV flux of the core (the brightest object near the jet) is not well-constrained, but even at a probably maximum U-band magnitude of 15 (more likely 16-17), a 900 second exposure is just barely at the saturation limit. We do include ORIENT constraints to avoid possible saturation spikes on the jet in any case, and we also include 12 e' of post-FLASH to minimize CTE. This is not strictly necessary in the area of the science target where the background light from the galaxy is high, but it is necessary for better localization of point sources far from the target, which are necessary for aligning the images with V-band imaging. Finally, ORIENT constraints were also applied to avoid a bright nearby galaxy (Vmag = 14.8) from being too near or straddling the chip gap or UVIS2 chip edge (with no effect on scheduling). ------------------------------------------------------------------------------------ 14671( 3) - 29-Aug-2016 20:10:25 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 4C00.58 GALAXY, JET, QUASAR, RA=16H06M12.7300S, J2000 V = 17.5 RADIO GALAXY DEC=+00D00'27.36" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 14671( 3) - 29-Aug-2016 20:10:25 - [ 4] Visit: 01 (ACS-optical) Visit Requirements: ORIENT 2.5D TO 47.5 D; ORIENT 92.5D TO 137.5 D; ORIENT 182.5D TO 227.5 D; ORIENT 272.5D TO 317.5 D; BETWEEN 01-JUN-2017:00:00:00 AND 01-NOV-2017:00:00:00 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 4C00.58 ACS/WFC ACCUM WFC1 F606W 1 404 S (404 POS TARG 0, 0 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 4C00.58 ACS/WFC ACCUM WFC1 F606W 1 404 S (404 POS TARG 0.15914, S) 0.23969 ------------------------------------------------------------------------------------------------------------------------------------ 3 4C00.58 ACS/WFC ACCUM WFC1 F606W 1 404 S (404 POS TARG 0.31641, S) 0.08319 ------------------------------------------------------------------------------------------------------------------------------------ 4 4C00.58 ACS/WFC ACCUM WFC1 F606W 1 404 S (404 POS TARG 0.07990, S) 4.19413 ------------------------------------------------------------------------------------------------------------------------------------ 5 4C00.58 ACS/WFC ACCUM WFC1 F606W 1 404 S (404 POS TARG 0.28771, S) 4.28896 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 4C00.58 1 ACS/WFC ACCUM WFC1 F606W none none none none 1 N/A 4C00.58 2 ACS/WFC ACCUM WFC1 F606W none none none none 1 N/A 4C00.58 3 ACS/WFC ACCUM WFC1 F606W none none none none 1 N/A 4C00.58 4 ACS/WFC ACCUM WFC1 F606W none none none none 1 N/A 4C00.58 5 ACS/WFC ACCUM WFC1 F606W none none none none 1 N/A 14671( 3) - 29-Aug-2016 20:10:25 - [ 5] Visit: 02 (WFC3-UV) Visit Requirements: ORIENT 60D TO 75 D; ORIENT 140D TO 163 D; ORIENT 240D TO 255 D; ORIENT 320D TO 340 D; ORIENT 85D TO 100 D; ORIENT 175D TO 200 D; ORIENT 270D TO 280 D; ORIENT 0D TO 15 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 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 866 S (866 POS TARG 0, 0 S S) ------------------------------------------------------------------------------------------------------------------------------------ 2 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 866 S (866 POS TARG 0.20646, S S) 0.14754 ------------------------------------------------------------------------------------------------------------------------------------ 3 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 866 S (866 POS TARG 0.41257, S S) 0.24554 ------------------------------------------------------------------------------------------------------------------------------------ 4 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 903 S (903 POS TARG 0.12505, S S) 4.34768 ------------------------------------------------------------------------------------------------------------------------------------ 5 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 903 S (903 POS TARG 0.33111, S S) 0.42753 ------------------------------------------------------------------------------------------------------------------------------------ 6 4C00.58 WFC3/UVI ACCUM UVIS2 F225W FLASH=12 1 903 S (903 POS TARG 0.53746, S S) 4.56020 ------------------------------------------------------------------------------------------------------------------------------------ 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 | ------------------------------------------------------------------------------------------------------------------------------------ 4C00.58 1 WFC3/UVI ACCUM UVIS2 F225W none none none none 1 N/A S 4C00.58 2 WFC3/UVI ACCUM UVIS2 F225W none none none none 1 N/A S 4C00.58 3 WFC3/UVI ACCUM UVIS2 F225W none none none none 1 N/A S 4C00.58 4 WFC3/UVI ACCUM UVIS2 F225W none none none none 2 N/A S 4C00.58 5 WFC3/UVI ACCUM UVIS2 F225W none none none none 2 N/A S 4C00.58 6 WFC3/UVI ACCUM UVIS2 F225W none none none none 2 N/A S 14671( 3) - 29-Aug-2016 20:10:25 - [ 6] Summary Form for Proposal 14671 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS2, WFC1 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 01-JUN-2017:00:00:00 AND 01-NOV-2017:00:00:00, ORIENT 0D TO 15 D, ORIENT 140D TO 163 D, ORIENT 175D TO 200 D, ORIENT 182.5D TO 227.5 D, ORIENT 2.5D TO 47.5 D, ORIENT 240D TO 255 D, ORIENT 270D TO 280 D, ORIENT 272.5D TO 317.5 D, ORIENT 320D TO 340 D, ORIENT 60D TO 75 D, ORIENT 85D TO 100 D, ORIENT 92.5D TO 137.5 D, POS TARG 0, 0, POS TARG 0.07990, 4.19413, POS TARG 0.12505, 4.34768, POS TARG 0.15914, 0.23969, POS TARG 0.20646, 0.14754, POS TARG 0.28771, 4.28896, POS TARG 0.31641, 0.08319, POS TARG 0.33111, 0.42753, POS TARG 0.41257, 0.24554, POS TARG 0.53746, 4.56020 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F606W ------------------------------------------------------------------------------------------------------------------------------------ Target Names 4C00.58 ------------------------------------------------------------------------------------------------------------------------------------