As a leader in astronomical imaging and delivering Hubble science to the world, the Office of Public Outreach at Space Telescope Science Institute wishes to organize a Hubble Space Telescope participation in the 2009 International Year of Astronomy (IYA) event entitled “100 Hours of Astronomy.” This cornerstone project, which will be held April 2 – 5, 2009, will bring together observers from all over the world to use and look through telescopes to admire the heavens. We will have a public voting session that will highlight six astronomical objects that have never been viewed with Hubble. Objects have been preselected to fit in the field of view of the WFPC2 camera, and that are observable during the April viewing window. The voting session will close on March 1st, 2009, and the most popular candidate will be observed and released during the “100 Hours of Astronomy” event. Observations will be made with four filters for a composite press release image. We ask for eight orbits of Hubble time from the Director’s Discretionary pool of orbits. This will allow a modest amount of S/N for the candidate that will be selected. The archive science data products will become public at the time of release.

We will obtain deep and well-sampled exposures of the target voted on by the public. We employ a dither box pattern, with two long exposures per orbit with broadband B, V, I, and redshifted H-alpha (F673N) filters. The data will be drizzled to a smaller output pixel scale to enhance resolution. Our carefully prepared dataset will be ingested into MAST as a High Level Science Product (HLSP), so that it will be accessible via archive searches. We request that data dumps be scheduled as soon as possible following the completion of our visits, and fast-track data delivery. UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE 0 false 0.0 0.0 false false false false false SUPPORTED CLUSTER OF GALAXIES INTERACTING GALAXY This object was generated by the targetselector and retrieved from the NED database. J2000 00 00 0.0000 +00 00 0.00 J2000 WFPC2 Imaging No F606W WFPC2 Imaging No F814W WFPC2 Imaging No F450W POS-TARG DITHER 0.559017 LINE 0.559017 false false 143.130102 4 26.56505 WFPC2-BOX 1 false Timing link suitability includes constraints ([Sequence (01 02) within 0.5 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11994 :visit-id "01" :proposal-version -1 :trans-version "20090130" :date "03-Mar-2009 09:18:24.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11994 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11994 :visit-id "01" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "01" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "01" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "01" :orbit-number 4 :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 3132 :pcs-gap 0 ) false 4 0 Timing link suitability includes constraints ([Sequence (01 02) within 0.5 days]) The scheduling data was generated by CASM 17.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 11994 :visit-id "02" :proposal-version -1 :trans-version "20090130" :date "03-Mar-2009 09:18:33.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 4 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 358528 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 11994 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 11994 :visit-id "02" :orbit-number 1 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "02" :orbit-number 2 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "02" :orbit-number 3 :pcs-time 355 :si-vis-utilization 2720 :al-overhead-at-end 160 :internal-dur-at-end 0 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3132 :pcs-gap 0 ) (Tic-Orbit :proposal-id 11994 :visit-id "02" :orbit-number 4 :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 3132 :pcs-gap 0 ) false 4 0