REvised COS target acquisition to use MIRRORB and increased exposure time to 100 sec. Used auto-adjust to fit science exposures into that orbit. ----- Attempting Submission 2 (Wed Dec 15 21:34:17 GMT 2010) ----- Probing the Physics of Gas in Cool Core Clusters: Virgo We recently detected 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. We propose to delve deeper into the physics of cool core clusters. We propose to use ACS to compare the spatial extent and morphology of the low and high temperature gas, to use the timely presence of COS to obtain a sensitive FUV spectrum of the hot gas, and, by introducing the notion of emission line polarimetry, seek a a potentially revolutionary new plasma diagnostic. The spatial distributions will reveal whether the hotter material is more spatially extended than the cooler; the FUV spectrum will permit derivation of the emission measure (essentially amount of gas) at each temperature between the 10^4K Halpha filaments and coronal gas at 10^7K. Together these strongly constrain plausible transport processes relating the hot and cool gas phases in this cool core cluster region, and hence the dominant physical processes at work. A novel ingredient is to obtain the optical images in polarimetric mode to probe emission line polarization levels, a diagnostic used in Solar physics to determine the relevance of collisional excitation processes such as electron impact polarization in thermal conduction or shocks. With this suite of straightforward, uniquely HST observations we may dramatically change the landscape of our understanding of the physics of cool core clusters
We will image the emission filaments using the F50LP SBC and F656N optical narrow band filter together with polarizing filters. We will also acquire COS spectroscopy in the FUV. ISM IN EXTERNAL GALAXIES 12 false 0.0 0.0 false false false false false false AVAILABLE CLUSTER OF GALAXIES CONDUCTION FRONT COOLING FLOW EMISSION LINE NEBULA FILAMENT mag given is nucleus J2000 12 30 51.0500 +12 23 25.00 J2000 CLUSTER OF GALAXIES CONDUCTION FRONT COOLING FLOW EMISSION LINE NEBULA FILAMENT mag given is nucleus J2000 12 30 51.0500 +12 23 25.00 J2000 CLUSTER OF GALAXIES CONDUCTION FRONT COOLING FLOW EMISSION LINE NEBULA FILAMENT mag given is nucleus J2000 12 30 51.0500 +12 23 25.00 J2000 GALAXY RADIO GALAXY This is the position of the nucleus of M87 J2000 00 00 0.0000 +00 00 0.00 J2000 ACS/SBC Imaging No No F150LP COS/FUV Spectroscopic No No G140L 1280 ACS/WFC Imaging No Yes F660N POS-TARG DITHER 0.472 LINE false false 2 44.4 ACS-SBC-DITHER-LINE 1 false The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12271 :visit-id "01" :proposal-version -1 :trans-version "20100505" :date "15-Dec-2010 16:24:07.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "28" :si-bright-earth-limb-angle 20.0 :data-volume 148112 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12271 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12271 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2911 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "01" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3022 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "01" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3022 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "01" :orbit-number 4 :pcs-time 222 :si-vis-utilization 3022 :al-overhead-at-end 0 :internal-dur-at-end 200 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) true 4 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12271 :visit-id "02" :proposal-version -1 :trans-version "20100505" :date "15-Dec-2010 16:24:10.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 632208 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12271 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12271 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2902 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "02" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3013 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "02" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12271 :visit-id "03" :proposal-version -1 :trans-version "20100505" :date "15-Dec-2010 16:24:12.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 3 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 632208 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12271 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12271 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2912 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "03" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3018 :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 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "03" :orbit-number 3 :pcs-time 222 :si-vis-utilization 3013 :al-overhead-at-end 0 :internal-dur-at-end 115 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) true 3 0 The scheduling data was generated by CASM 18.3.1. CASM was run in Phase II mode. (Tic-Visit :proposal-id 12271 :visit-id "04" :proposal-version -1 :trans-version "20100505" :date "15-Dec-2010 16:25:20.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "31" :si-bright-earth-limb-angle 20.0 :data-volume 348032 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12271 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12271 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2873 :al-overhead-at-end 0 :internal-dur-at-end 116 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) (Tic-Orbit :proposal-id 12271 :visit-id "04" :orbit-number 2 :pcs-time 222 :si-vis-utilization 3020 :al-overhead-at-end 0 :internal-dur-at-end 352 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3245 :pcs-gap 0 ) true 2 0