single guide stars on 10 and 20; 11-12 ----- Attempting Submission 2 (Fri Jun 01 15:01:47 GMT 2007) ----- ----- Attempting Submission 3 (Fri Jun 01 18:01:55 GMT 2007) ----- Phase II Proposal 11216 (11216) successfully submitted. ----- Attempting Submission 4 (Fri Jun 01 18:55:53 GMT 2007) ----- Lots of messages about exposures decreased from 500.5 to 500 seconds, etc. Not important. HST / Chandra Monitoring of a Dramatic Flare in the M87 Jet As the nearest galaxy with an optical jet, M87 affords an unparalleled opportunity to study extragalactic jet phenomena at the highest resolution. During 2002, HST and Chandra monitoring of the M87 jet detected a dramatic flare in knot HST-1 located ~1" from the nucleus. Its optical brightness eventually increased seventy-fold and peaked in 2005; the X-rays show a similarly dramatic outburst. In both bands HST-1 is still extremely bright and greatly outshines the galaxy nucleus. To our knowledge this is the first incidence of an optical or X-ray outburst from a jet region which is spatially distinct from the core source -- this presents an unprecedented opportunity to study the processes responsible for non-thermal variability and the X-ray emission. We propose five epochs of HST/WFPC2 flux monitoring during Cycle 16, as well as seven epochs of Chandra/ACIS observation (5ksec each, six Chandra epochs contemporary with HST). At two of the HST/WFPC2 epochs we also gather spectral information, and at one epoch we will map the magnetic field structure. The results of this investigation are of key importance not only for understanding the nature of the X-ray emission of the M87 jet, but also for understanding flares in blazar jets, which are highly variable, but where we have never before been able to resolve the flaring region in the optical or X-rays. These new observations will allow us to track the decay phase of the giant flare, and study smaller secondary flares such as seen late in 2006. Ultimately we will test synchrotron emission models for the X-ray outburst, constrain particle acceleration and loss timescales, and study the jet dynamics associated with this flaring component.
There are 5 epochs represented by the first digit of the visit number. All epochs have one orbit of F255W imaging, which is close in wavelength to prior STIS and ACS/HRC data. Epochs 1 and 5 add spectral information in F450W, F606W, and F814W. The first epoch also contains F606W polarimetry in the WFC CCDs (visit 12). All imaging is on the PC, except for the polarimetry. Visits 10, 11, 12, 20 use single guidestars due to scheduling problems. AGN/QUASARS 12 false 35 0.0 false false false false false false SUPPORTED GALAXY JET RADIO GALAXY J2000 12 30 49.4000 +12 23 28.00 J2000 ACS/HRC Imaging No No F220W ACS/HRC Imaging No No F250W ACS/HRC Imaging No No F475W ACS/HRC Imaging No Yes F606W ACS/HRC Imaging No No F814W ACS/HRC Imaging No No F250W ACS/HRC Imaging No Yes F606W ACS/HRC Imaging No No F250W ACS/HRC Imaging No Yes F606W ACS/HRC Imaging No No F250W ACS/HRC Imaging No Yes F606W ACS/HRC Imaging No No F220W ACS/HRC Imaging No No F250W ACS/HRC Imaging No No F475W ACS/HRC Imaging No Yes F606W ACS/HRC Imaging No No F814W Please schedule as close as possible to Chandra observations on 15 Nov 2007. Single guide star. (Tic-Visit :proposal-id 11216 :visit-id "10" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:57:12.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "10" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) false 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16332.xml Please schedule as close as possible to Chandra observations on 15 Nov 2007. Single guide star. (Tic-Visit :proposal-id 11216 :visit-id "11" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:31.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "11" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2640 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) false 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16325.xml Please schedule as close as possible to Chandra observations on 15 Nov 2007. Single guide star. (Tic-Visit :proposal-id 11216 :visit-id "12" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:39.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 537792 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "12" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2760 :al-overhead-at-end 120 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) false 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16326.xml Please schedule as close as possible to Chandra observations on 29 Dec 2007. Single guide star. (Tic-Visit :proposal-id 11216 :visit-id "20" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:44.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "20" :obset-id "20" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "20" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) false 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16327.xml Please schedule as close as possible to Chandra observations on 12 Feb 2008. (Tic-Visit :proposal-id 11216 :visit-id "30" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:48.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "30" :obset-id "30" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "30" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16328.xml Please schedule as close as possible to Chandra observations on 27 Mar 2008. (Tic-Visit :proposal-id 11216 :visit-id "40" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:52.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "40" :obset-id "40" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "40" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16329.xml Please schedule as close as possible to Chandra observations on 10 May 2008. (Tic-Visit :proposal-id 11216 :visit-id "50" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:49:55.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "50" :obset-id "50" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "50" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16330.xml Please schedule as close as possible to Chandra observations on 10 May 2008. (Tic-Visit :proposal-id 11216 :visit-id "51" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:31:13.0" :trans-errors '(:WARNINGS 4 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "51" :obset-id "51" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "51" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2760 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16322.xml Please schedule as close as possible to Chandra observations on 10 May 2008. (Tic-Visit :proposal-id 11216 :visit-id "52" :proposal-version -1 :trans-version "20070326" :date "01-Jun-2007 10:50:01.0" :trans-errors '(:WARNINGS 8 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11216 :visit-id "52" :obset-id "52" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11216 :visit-id "52" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2700 :al-overhead-at-end 180 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3137 :pcs-gap 0 ) true 1 0 C:\Documents and Settings\JB\Local Settings\Temp\OPVisit16331.xml