Resubmission after adding "Same Orient As" to the second visit, as suggested by Amber Armstrong. -1626434972 ----- Attempting Submission 2 (Fri Oct 04 18:19:39 GMT 2013) ----- ----- Attempting Submission 3 (Wed Jan 29 10:33:37 GMT 2014) ----- Testing relativistic feedback at crucial jet power PKS B2152-699 is one of the brightest FRI/II radio sources in the sky. Our previous work has shown its ability to create strong shock-bounded cavities in the intergalactic medium, and has measured the energy content of the lobes, demonstrating the physical consistency of our understanding of the processes of radio-source feedback. Here we wish to make an X-ray spectral index measurement of the northern hotspot to test another important component of the theory - that strong jets remain relativistic over their full lengths. This test should also resolve the outstanding issue of the origin of the offsets between the radio, optical and X-ray centroids of hot spots. At the same time we will gather more data on the thermal properties of the enigmatic High Ionization Cloud that appears to be deflecting the jet, and trace the shock structure to larger distances. Two single-filter, single-orbit, observations of the optical feature associated with the northern hotspot of PKS B2152-699. The aim is to investigate the optical structure, which is offset from both the X-ray and the radio features. Good image stability and fair photometry are required to obtain the necessary structural data. There is no particular orientation requirement. The main galaxy light lies on the same chip in many rolls, but should not cause any problems. The target feature is around 21 mag. The observations are performed using four sub-exposures each (standard box pattern) to reduce issues with cosmic rays. The gap between the detectors crosses the outer jet in many rolls, but study of the outer jet is not possible without a far deeper exposure, so this is not a concern. AGN/QUASARS Default false false false false false SUPPORTED GALAXY EMISSION LINE NEBULA JET KNOT LOBE RADIO GALAXY This is the magnitude of the host galaxy, 40 arcsec away. The hotspot is around 21 mag. J2000 J2000 WFC3/UVIS Imaging No No F606W WFC3/UVIS Imaging No No F814W POS-TARG DITHER 0.265 Default minimal dither. LINE 0.187 false false 69.05 4 20.67 ACS-WFC-DITHER-BOX 1 false The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13507 :visit-id "01" :proposal-version -1 :trans-version "20130722" :date "04-Oct-2013 14:33:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13507 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13507 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3246 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 1 0 /tmp/OPVisit2832642824384002346.xml The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13507 :visit-id "02" :proposal-version -1 :trans-version "20130722" :date "29-Jan-2014 10:29:11.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 1136896 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13507 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13507 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3246 :al-overhead-at-end 0 :internal-dur-at-end 347 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3582 :pcs-gap 0 ) true 1 0