We have detected and confirmed the presence of high temperature gas at 10^5K associated with the low excitation 10^4K line emission filaments of M87. This is a profoundly important observation bearing on the physics of transport processes in cool-core clusters, mergers and feedback from AGN into the surrounding ISM. We propose to obtain a deep FUV COS spectrum in order to (1) detect lines that are characteristic of gas at a wide range of temperatures and (2) measure the FUV CIV and HeII line widths and velocity. The additional emission lines will allow us to empirically determine the temperature distribution across the critical region between 10^4K ("optical") and 10^7K ("X-ray") in the filament and understand how these two very different components of the ISM are connected, and which theoretical scenario is viable. The line widths and velocity further offer a direct discrimination between competing physical processes that include turbulence, condensation and evaporation - observationally broadening, inflow and outflow respectively. We will also acquire a two orbit ACS/SBC image to image the HeII line, which has a higher mean emission temperature than CIV, in isolation from CIV. In conjunction with our existing FUV deep image, we will be able to study the structure of the filaments in these two lines, and hence reveal the character of spatial variations of the interface between hot and cool gas. We will obtain 10 orbits of COS G140L spectra, mimicing the target acquisition procedure from proposal 12271. We will also acquire two orbits using the ACS/SBC F165LP filter. ISM IN EXTERNAL GALAXIES 12 false true 0.0 0.0 false false false SUPPORTED CLUSTER OF GALAXIES CONDUCTION FRONT COOLING FLOW EMISSION LINE NEBULA FILAMENT J2000 J2000 mag given is nucleus CLUSTER OF GALAXIES CONDUCTION FRONT COOLING FLOW EMISSION LINE NEBULA FILAMENT J2000 J2000 mag given is nucleus GALAXY RADIO GALAXY This is the position of the nucleus of M87 J2000 J2000 ACS/SBC Imaging No No F165LP COS/FUV Spectroscopic No No G140L 1280 POS-TARG DITHER 0.472 LINE false false 2 44.4 ACS-SBC-DITHER-LINE 1 false The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13439 :visit-id "01" :proposal-version -1 :trans-version "20130502" :date "06-Jun-2013 14:02:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 878704 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13439 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13439 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2859 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3015 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "01" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3017 :al-overhead-at-end 0 :internal-dur-at-end 366 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13439 :visit-id "02" :proposal-version -1 :trans-version "20130502" :date "04-Jun-2013 17:22:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 5 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 878704 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13439 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13439 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2859 :al-overhead-at-end 0 :internal-dur-at-end 114 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 48 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "02" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3015 :al-overhead-at-end 0 :internal-dur-at-end 38 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "02" :orbit-number 5 :pcs-time 222 :si-vis-utilization 3017 :al-overhead-at-end 0 :internal-dur-at-end 366 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) true 5 0 The scheduling data was generated by CASM 21.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13439 :visit-id "03" :proposal-version -1 :trans-version "20130502" :date "04-Jun-2013 16:28:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 74064 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13439 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13439 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2905 :al-overhead-at-end 0 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) (Tic-Orbit :proposal-id 13439 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3016 :al-overhead-at-end 0 :internal-dur-at-end 117 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3239 :pcs-gap 0 ) true 2 0