The ACS / HRC coronagraph has now demonstrated an unmatched capability to detect dusty debris disks around bright, nearby stars. Among the "Big Four" debris disks discovered with IRAS twenty years ago, only Epsilon Eridani (SpT=K2V, d=3.2 pc) has yet to be targeted with ACS. Beta Pictoris, Fomalhaut and Vega have been imaged with the ACS coronagraph, with the recent detection of reflected light from Fomalhaut's dust belt (Kalas, Graham & Clampin 2005). The direct detection of dust scattered light around Fomalhaut shows disk structure and asymmetry that can be directly linked to dynamical models of planetary perturbation. Here we propose to use the ACS HRC and WFC to detect Eps Eri's dust belt. A new motivation to attempt this observations arises from recent 350 micron images that reveal two dust arcs ~60 AU to the southeast and northwest of the star. Contrary to previous 850 and 450 micron maps, the northwest arc is brighter than the southeast arc, and the northwest region has not been targeted by previous STIS imaging at lower contrast. The optical detection of dust features around Eps Eri would be significant because a high resolution optical image, together with Spitzer and sub-mm images, would help anchor dynamical models of Eps Eri's planetary system, in addition to providing direct visual indications of disk-planet interactions.

GO 10895 has two components, HRC coronagraphy and WFC direct imaging, and it has two targets, the bright nearby star epsilon Eridani and its PSF reference star HD 26965. HRC coronagraphy utilizes the 3.0 arcsecond occulting spot. WFC direct imaging places the stars at WFCENTER and the telescope is rolled to three angles. If there are problems with the scheduling of the program, we can try using a different PSF reference star (hd 23249) ISM AND CIRCUMSTELLAR MATTER 12 false 0.0 false false false false false SUPPORTED STAR DISK This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 03 32 55.8442 -09 27 29.74 J2000 CALIBRATION POINT SPREAD FUNCTION This object was generated by the targetselector and retrieved from the SIMBAD database. J2000 04 15 16.3201 -07 39 10.34 J2000 CALIBRATION POINT SPREAD FUNCTION J2000 00 00 0.0000 +00 00 0.00 J2000 ACS/HRC Imaging Yes No F606W ACS/HRC Imaging Yes No F606W ACS/HRC Imaging Yes No F606W ACS/HRC Imaging Yes No F606W ACS/HRC Imaging Yes No F606W ACS/HRC Imaging Yes No F606W ACS/WFC Imaging No No F606W ACS/WFC Imaging No No F606W (Tic-Visit :proposal-id 10895 :visit-id "01" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 13:53:30.0" :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 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "02" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 13:53:37.0" :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 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "03" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 13:53:43.0" :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 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "03" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "04" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 13:53:50.0" :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 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "04" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "05" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 13:53:56.0" :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 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "05" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "06" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 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 "27" :si-bright-earth-limb-angle 20.0 :data-volume 896320 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10895 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "06" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2648 :al-overhead-at-end 0 :internal-dur-at-end 351 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) true 1 0 (Tic-Visit :proposal-id 10895 :visit-id "07" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:00:06.0" :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 10895 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "07" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10895 :visit-id "08" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:01:14.0" :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 10895 :visit-id "08" :obset-id "08" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "08" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10895 :visit-id "09" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:01:18.0" :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 10895 :visit-id "09" :obset-id "09" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "09" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10895 :visit-id "10" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:01:22.0" :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 10895 :visit-id "10" :obset-id "10" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "10" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10895 :visit-id "11" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:01:26.0" :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 10895 :visit-id "11" :obset-id "11" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "11" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10895 :visit-id "12" :proposal-version -1 :trans-version "20060322" :date "20-Jun-2006 15:01:29.0" :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 10895 :visit-id "12" :obset-id "12" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10895 :visit-id "12" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2641 :al-overhead-at-end 0 :internal-dur-at-end 349 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3028 :pcs-gap 0 ) false 1 0