Hi Beth, I am submitting an updated Visit 52, with the following modifications: 1. Slightly modified target position (NGC4449-WFPC2-2), to make sure I can center the WF4-affected region in the WF3-FIX aperture. This is target # 5 in the Phase 2. 2. Visit 52 now contains target # 5 (NGC4449-WFPC2-2), and the aperture is WF3-FIX. No other modifications were implemented. Thanks for your help. Cheers, Daniela ----- Submission 1 (Fri May 13 14:17:14 GMT 2005) ----- Phase II Proposal 10522 (10522) successfully submitted. ----- Submission 2 (Fri May 20 15:24:51 GMT 2005) ----- ----- Submission 3 (Tue Jan 10 15:10:44 GMT 2006) ----- The new visit is a copy of Visit 2, part of which (1 exposure) failed because of the WFPC2 `WF4 bias problem'. Assigned ID: 347 ----- Submission 1 (Fri Jan 21 20:22:55 GMT 2005) ----- Phase I Proposal 347 (cy14_feedback) successfully submitted. ----- Submission 3 (Fri Jan 21 21:20:29 GMT 2005) ----- Calibrating Star Formation: The Link between Feedback and Galaxy Evolution Stellar feedback - the return of mass and energy from star formation to the interstellar medium - is one of the primary engines of galaxy evolution. Yet, the theoretical foundation of mechanical feedback is, to date, unconstrained by observations. We propose to investigate this fundamental aspect of star formation on a sample of two local actively star-forming galaxies, NGC4449, and Holmberg II. The two galaxies have been selected to occupy an unexplored, yet crucial for quantifying mechanical feedback, niche in the two-parameter space of star formation intensity and galaxy mass. ACS/WFC and WFPC2 narrow-band observations in the light of H-beta, [OIII], H-alpha, and [NII] will be obtained for both galaxies, in order to: (1) discriminate the feedback-induced shock fronts from the photoionization regions; (2) map the shocks inside and around the starburst regions; and (3) measure the energy budget of the star-formation-produced shocks. These observations, complemented by existing data, will yield: (1) the efficiency of the feedback, i.e. the fraction of the star formation's mechanical energy that is transported out of the starburst volume rather than confined or radiated away; (2) the dependence of this efficiency on the two fundamental parameters of star formation intensity and stellar mass. The high angular resolution of HST is crucial for separating the spatially narrow shock fronts (~5 pc, ~0.25" at 4 Mpc) from the more extended photoionization fronts. The legacy from this project will be the most complete quantitative measurement of the energetics associated with feedback processes. We will secure the first milestone for placing feedback mechanisms on a solid physical ground, and for understanding quantitatively their role on the energetics, structure, and star formation history of galaxies at all redshifts.
The two galaxies, NGC4449 and HombergII, will be observed with ACS (filters: F502N, F658N, F660N, F550M, and F814W) and WFPC2 (F487N). No images in F658N will be obtained for NGC4449, as these images will be coming from another GO program. For NGC4449: 2 orbits are devoted to the ACS observations, and 1 orbit to the WFPC2 observations. Each F502N and F660N will be obtained with 3 exposures stepped by about 30 pixels in the Y direction, and about 5 pixels in the X direction, to remove cosmic rays, hot pixels, and to cover the gap between the ACS CCDs (using one of the available ACS PATTERNs). The end result will be a field mostly covered with 3 exposures; the equivalent of 1 gap covered with one exposure, and another 1-gap-equivalent with only 1 exposure. For the F550M and F814W images, only 2 exposures could be fit into the orbits, implying a 2-gap-equivalent with one exposure; for these exposures, the stepping is done with POS TARG. The ORIENT constraints imposed on the ACS images prevent the gap from landing onto regions of interest for this project. Three exposures (1 orbit) are used for WFPC2/F487N. The ORIENT constraints ensure the interesting regions to land within the WFPC2 chips. For HolmbergII: 3 orbits are devoted to ACS observations, and 2 orbits to the WFPC2 observations. The approach adopted for this galaxy (including the ORIENT constraints) is similar to that of NGC4449. The main difference is that for HolmbergII the F550M and F814W observations are obtained with three exposures instead of 2, ensuring a better coverage of the gap between the CCDs. POS TARGs are used for these exposures. GALAXIES 6 false 0.0 false false false false false SUPPORTED GALAXY INTERACTING GALAXY STARBURST MAGELLANIC IRREGULAR Position adjusted to fit galaxy within ACS/WFPC2 FOVs. Interest is in low-surface brightness narrow-line emitting regions surrounding the main visible body of the galaxy. UGC7592 J2000 12 28 11.9000 +44 05 40.00 J2000 GALAXY MAGELLANIC IRREGULAR STARBURST Position adjusted to fit within the ACS/WFPC2 FOVs. UGC4305 J2000 08 19 5.0000 +70 43 12.00 J2000 GALAXY INTERACTING GALAXY STARBURST MAGELLANIC IRREGULAR Position adjusted to fit galaxy within ACS/WFPC2 FOVs. UGC7592 J2000 12 28 11.9000 +44 05 40.00 J2000 GALAXY INTERACTING GALAXY STARBURST MAGELLANIC IRREGULAR Position adjusted to fit galaxy within ACS/WFPC2 FOVs. UGC7592 J2000 12 28 11.9000 +44 05 40.00 J2000 GALAXY MAGELLANIC IRREGULAR STARBURST Position adjusted to fit within the ACS/WFPC2 FOVs. UGC4305 J2000 08 19 5.0000 +70 43 12.00 J2000 ACS/WFC Imaging No No F502N ACS/WFC Imaging No No F658N ACS/WFC Imaging No No F550M ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F660N WFPC2 Imaging No F487N ACS/WFC Imaging No No F502N ACS/WFC Imaging No No F658N ACS/WFC Imaging No No F550M ACS/WFC Imaging No No F814W ACS/WFC Imaging No No F660N WFPC2 Imaging No F487N POS-TARG DITHER 3.011 LINE false false 3 85.28 ACS-WFC-DITHER-LINE 1 false (Tic-Visit :proposal-id 10522 :visit-id "01" :proposal-version -1 :trans-version "20050323" :date "20-May-2005 11:19:49.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "27" :si-bright-earth-limb-angle 20.0 :data-volume 2558016 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10522 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10522 :visit-id "01" :orbit-number 1 :pcs-time 367 :si-vis-utilization 2982 :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 3351 :pcs-gap 0 ) (Tic-Orbit :proposal-id 10522 :visit-id "01" :orbit-number 2 :pcs-time 367 :si-vis-utilization 2982 :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 3351 :pcs-gap 0 ) false 2 0 (Tic-Visit :proposal-id 10522 :visit-id "02" :proposal-version -1 :trans-version "20050323" :date "12-May-2005 15:22:28.0" :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 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10522 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10522 :visit-id "02" :orbit-number 1 :pcs-time 367 :si-vis-utilization 2880 :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 3351 :pcs-gap 0 ) false 1 0 (Tic-Visit :proposal-id 10522 :visit-id "03" :proposal-version -1 :trans-version "20050323" :date "12-May-2005 15:33:19.0" :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 4263360 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10522 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10522 :visit-id "03" :orbit-number 1 :pcs-time 367 :si-vis-utilization 3291 :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 3658 :pcs-gap 0 ) (Tic-Orbit :proposal-id 10522 :visit-id "03" :orbit-number 2 :pcs-time 367 :si-vis-utilization 3291 :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 3658 :pcs-gap 0 ) (Tic-Orbit :proposal-id 10522 :visit-id "03" :orbit-number 3 :pcs-time 367 :si-vis-utilization 3291 :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 3658 :pcs-gap 0 ) false 3 0 (Tic-Visit :proposal-id 10522 :visit-id "04" :proposal-version -1 :trans-version "20050323" :date "12-May-2005 15:33:31.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 2 :saa-model "26" :si-bright-earth-limb-angle 20.0 :data-volume 179264 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10522 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10522 :visit-id "04" :orbit-number 1 :pcs-time 367 :si-vis-utilization 3200 :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 3658 :pcs-gap 0 ) (Tic-Orbit :proposal-id 10522 :visit-id "04" :orbit-number 2 :pcs-time 367 :si-vis-utilization 3180 :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 3658 :pcs-gap 0 ) false 2 0 (Tic-Visit :proposal-id 10522 :visit-id "02" :proposal-version -1 :trans-version "20050323" :date "12-May-2005 15:22:28.0" :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 134448 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 10522 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 10522 :visit-id "02" :orbit-number 1 :pcs-time 367 :si-vis-utilization 2880 :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 3351 :pcs-gap 0 ) false 1 0