0 Assigned ID: 2533 ----- Attempting Submission 1 (Sun Sep 14 00:46:10 GMT 2014) ----- This is the second update to this proposal. Some modifications were made to the POS_TARG positions to put the targets closer to the readouts in the ACS imaging to minimize CTE losses. The ORIENT constraints were also slightly modified to avoid bright stars in the chip gap or near the edge of the detector. 384992405 ----- Attempting Submission 1 (Tue Oct 14 12:18:36 GMT 2014) ----- ----- Attempting Submission 2 (Mon Oct 20 21:03:21 GMT 2014) ----- ----- Attempting Submission 3 (Mon Nov 10 17:12:46 GMT 2014) ----- Solving the X-ray Origin Problem in Large-scale Jets with Chandra and Fermi Observations We propose deep ACIS-S observations of five kpc-scale powerful quasar jets, previously detected in short exposures 10-13 years ago, to accurately measure the X-ray flux level and spectral index for individual knots in the resolved jet. We are motivated by our recent results that in two powerful sources, 3C 273 and PKS 1136-135, the X-rays are synchrotron, rather than the widely believed IC emission off the CMB. These two models imply radically different jets and deep Chandra imaging is necessary to distinguish between them with the help of existing Fermi data. The proposed targets have been selected to cover almost 2 orders of magnitude in jet power, which allows us to evaluate the X-ray emission mechanism over a wide range of jet powers. Four HST orbits for 2 targets were granted as part of a Chandra X-ray observing proposal. Those targets are two quasars with 5-8" resolved radio jets. The source positions given are of the core (nucleus). The science target is the large-scale jet, which will be observed in the IR (WFC3 F160W) and optical (ACS/WFC F814W) with the goal of detecting the individual knots (0.5-1" in extent) in the jet. 3C9 has a jet extending to the southeast (PA 132 degrees) for ~8", and also shows a hotspot on the side 180 from the jet, also ~8" from the core position. QSO 0234+285 has only a one-sided jet extending due North (PA 0 degrees) for ~5" before making a 90 degree turn to the West. We considered the PA of the jet to run through angles 330-360 degrees for the purposes of roll angle constraints. For the IR observations, we used a modified line-dither pattern and roll angle constraints to ensure no problems with persistence from the bright cores would affect the pixels centered on the jet knots. For the ACS/WFC imaging, we centered the target on the WFC1 chip and applied roll angle constraints to avoid any blooming/streaking from a saturated core from over-running the jet. No other bright objects are in the vicinity of the targets. AGN/QUASARS Default false false false false false SUPPORTED GALAXY JET KNOT NUCLEUS QUASAR RADIO GALAXY J2000 J2000 GALAXY JET KNOT NUCLEUS QUASAR RADIO GALAXY J2000 J2000 WFC3/IR Imaging No No F160W ACS/WFC Imaging No No F814W WFC3/IR Imaging No No F160W ACS/WFC Imaging No No F814W POS-TARG DITHER 0.605 LINE false false 3 41.788 WFC3-IR-DITHER-LINE-3PT 1 false The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit3797156698842692077.xml 3C 9 is a radio galaxy with a relatively bright core. The science target(s) are a series of bright knots in the radio jet extending out ~ 8 arcseconds to the southeast. To avoid persistance from the core accidentally contaminating pixels which image the jet in subsequent exposures, the dithering pattern extends out more or less in a line, using the standard 3-pt line dither with an additional POSTARG offset. Roll angle constraints are used to ensure this line does not end up going over the jet. (Tic-Visit :proposal-id 13945 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "09-Dec-2014 13:53:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1671264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13945 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13945 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3231 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit6422563157225137458.xml QSO 0234-285, like 3C 9 has a relatively bright core. The science target is a resolved jet extending out ~5" to the west. Similar precautions as with 3c9 were taken with the line-dither pattern and roll angle constraints to avoid any persistent flux from the bright core from contaminating pixels which later center on the jet which is the main science target. (Tic-Visit :proposal-id 13945 :visit-id "02" :proposal-version -1 :trans-version "20140605" :date "09-Dec-2014 13:53:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1671264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13945 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13945 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2868 :al-overhead-at-end 0 :internal-dur-at-end 671 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3241 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit1188587671946166445.xml Roll Angle (ORIENT) constraints are specified to avoid any blooming or streaking from the core from over-running the jet, and also to avoid placing bright stars either in the chip gap or near the edge of a dector (to avoid "dragon's breath" and reflection problems). We applied a 5-pt dithering pattern to optimize PSF sampling, with the last two exposures offset by 4" in y in order to cover the chip gap, in order to increase the archive utility of the images. The POS_TARGS are also set to move the target nearer to the B readouts, to minimize CTE since the jet target is expected to be faint. (Tic-Visit :proposal-id 13945 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "09-Dec-2014 13:53:19.0" :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 1421120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13945 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13945 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2897 :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 3231 :pcs-gap 0 ) true 1 0 /private/var/folders/8k/sxlgy5ts2xdbykzf_vw6jrfw0001c5/T/OPVisit6541636282761213068.xml The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. Roll Angle (ORIENT) constraints are specified to avoid any blooming or streaking from the core from over-running the jet, and also to avoid placing bright stars either in the chip gap or near the edge of a dector (to avoid "dragon's breath" and reflection problems). We applied a 5-pt dithering pattern to optimize PSF sampling, with the last two exposures offset by 4" in y in order to cover the chip gap, in order to increase the archive utility of the images. The POS_TARGS are also set to move the target nearer to the A readouts, to minimize CTE since the jet target is expected to be faint. (Tic-Visit :proposal-id 13945 :visit-id "04" :proposal-version -1 :trans-version "20140605" :date "09-Dec-2014 13:53:21.0" :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 1421120 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13945 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13945 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2907 :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 3241 :pcs-gap 0 ) true 1 0