Exploiting the full power of the Wide Field Camera 3 (WFC3), we propose deep panchromatic imaging of four fields in the Galactic bulge. These data will enable a sensitive dissection of its stellar populations, using a new set of reddening-free photometric indices we have constructed from broad-band filters across UV, optical, and near-IR wavelengths. These indices will provide accurate temperatures and metallicities for hundreds of thousands of individual bulge stars. Proper motions of these stars derived from multi-epoch observations will allow separation of pure bulge samples from foreground disk contamination. Our catalogs of proper motions and panchromatic photometry will support a wide range of bulge studies. Using these photometric and astrometric tools, we will reconstruct the detailed star-formation history as a function of position within the bulge, and thus differentiate between rapid- and extended-formation scenarios. We will also measure the dependence of the stellar mass function on metallicity, revealing how the characteristic mass of star formation varies with chemistry. Our sample of bulge stars with accurate metallicities will include 12 candidate hosts of extrasolar planets. Planet frequency is correlated with metallicity in the solar neighborhood; our measurements will extend this knowledge to a remote environment with a very distinct chemistry. Our proposal also includes observations of six well-studied globular and open star clusters; these observations will serve to calibrate our photometric indices, provide empirical population templates, and transform the theoretical isochrone libraries into the WFC3 filter system. Besides enabling our own program, these products will provide powerful new tools for a host of other stellar-population investigations with HST/WFC3. We will deliver all of the products from this Treasury Program to the community in a timely fashion.

This program is simply repeating the GO-11664/F814W exposures in 3 of the bulge fields (STANEK, BAADE, OGLE29), using the same orientation that executed previously, with at least a 2-year baseline between the exposures here and those in GO-11664. Unfortunately, Visit 13 (STANEK) is difficult to schedule at the same orientation that executed in Cycle 17, so it is using the 'SCHED 80" requirement and a shorter orbit. RESOLVED STELLAR POPULATIONS 0 false 0.0 0.0 true false false false SUPPORTED GALAXY BULGE J2000 J2000 GALAXY BULGE J2000 J2000 GALAXY BULGE J2000 J2000 WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F814W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W WFC3/IR Imaging No No F110W WFC3/IR Imaging No No F160W WFC3/UVIS Imaging No No F390W WFC3/UVIS Imaging No No F555W WFC3/UVIS Imaging No No F814W The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. F814W (I; orbit 1). 7 exposures per orbit. 2 short exposures at (+0.75,-20) and (-0.75,+20), with exposure times of 1 sec and 10 sec, respectively. 4 medium exposures (348 sec each) in a 4-point dither pattern to resample the PSF, but with the first two offset by (0,-40) and the second two offset by (0,0). 1 long exposure (740 sec in orbit 1) offset by (0,+40). (Tic-Visit :proposal-id 12666 :visit-id "13" :proposal-version -1 :trans-version "20110509" :date "10-Jun-2011 09:01:23.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2021248 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12666 :visit-id "13" :obset-id "13" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12666 :visit-id "13" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2763 :al-overhead-at-end 118 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3098 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. F814W (I; orbit 1). 7 exposures per orbit. 2 short exposures at (+0.75,-20) and (-0.75,+20), with exposure times of 1 sec and 10 sec, respectively. 4 medium exposures (348 sec each) in a 4-point dither pattern to resample the PSF, but with the first two offset by (0,-40) and the second two offset by (0,0). 1 long exposure (740 sec in orbit 1) offset by (0,+40). (Tic-Visit :proposal-id 12666 :visit-id "23" :proposal-version -1 :trans-version "20110509" :date "10-Jun-2011 08:58:35.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2021232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12666 :visit-id "23" :obset-id "23" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12666 :visit-id "23" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2923 :al-overhead-at-end 118 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3301 :pcs-gap 0 ) true 1 0 The scheduling data was generated by CASM 19.3. CASM was run in Phase II mode. F814W (I; orbit 1). 7 exposures per orbit. 2 short exposures at (+0.75,-20) and (-0.75,+20), with exposure times of 1 sec and 10 sec, respectively. 4 medium exposures (348 sec each) in a 4-point dither pattern to resample the PSF, but with the first two offset by (0,-40) and the second two offset by (0,0). 1 long exposure (740 sec in orbit 1) offset by (0,+40). (Tic-Visit :proposal-id 12666 :visit-id "33" :proposal-version -1 :trans-version "20110509" :date "10-Jun-2011 08:58:37.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "29" :si-bright-earth-limb-angle 20.0 :data-volume 2021232 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 12666 :visit-id "33" :obset-id "33" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 12666 :visit-id "33" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2923 :al-overhead-at-end 118 :internal-dur-at-end 670 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3257 :pcs-gap 0 ) false 1 0