0 Assigned ID: 400 ----- Attempting Submission 1 (Fri Apr 05 11:37:22 GMT 2019) ----- 0 ----- Attempting Submission 1 (Tue Jul 23 15:48:32 GMT 2019) ----- The unique ID for this investigator was not found in the STScI database. 0 A first measurement of the global AGB dust production in a metal-rich galaxy Asymptotic Giant Branch (AGB) stars are significant contributors to the enrichment of the interstellar medium. Their total dust contribution relative to supernovae, and how it changes with metallicity, is less certain. This uncertainty is largely due to the poorly determined dust-production rates. Using Spitzer, we identified 110 extreme AGB stars and >1500 candidate evolved stars within the Local Group dwarf elliptical galaxy M32. As M32 is an elliptical, metal-rich system, it provides a test environment similar to massive galaxies at high redshift. The unique medium-band filter set for HST WFC3/IR will identify and isolate the evolved stars in M32, and thereby overcome resolution limitations to constrain their spectral energy distributions. The HST medium-band filters are integral to distinguishing oxygen- from carbon-rich AGB stars, providing key constraints to the derived stellar parameters and decreasing the uncertainty in the dust production by an order of magnitude. With only 4 fields, we will confirm and characterise the majority of our AGB candidates, thereby calculating the global dust budget of our closest metal-rich elliptical galaxy. Comparison to complementary studies in metal-poor galaxies will provide a critical test of how metallicity influences evolved star dust production. These AGB stars are prime targets for follow-up spectroscopy with JWST to determine elemental abundances and the mineralogy of the ejected mass; the HST observations will provide the high-precision astrometry required for JWST. Using one orbit per pointing, we will observe four regions of M32 using WFC3/IR medium band filters to identify AGB stars. We target four fields in M32 that overlap with Spitzer coverage. Our selected fields represent the best compromise between sampling the bulge of M32 at a point at which crowding should not be a factor versus minimizing the M31 background populations. To isolate carbon stars from oxygen-rich AGB stars, we will use WFC3/IR with the F127M, F139M, and F153M medium-band filters. We can achieve the necessary photometric depth in of 23 mag for a M6III star, with a S/N >7 for the F139M band in 850 seconds. The S/N is even better in the F127M, and F153M filters, owing to a higher throughput. We will use four IR dither positions for each filter to get Nyquist sampling of the PSF. We will avoid saturation of bright sources by using the STEP ramp sequences with 5 reads per dither. The team has a strong background in near-IR populations, point-source photometry, and extensive experience in their analysis. The team are experts on M32; with its mid-IR and variable star populations the focus of several successful Spitzer observing campaigns (PID: 3400, 11103) and papers (e.g. Jones et al. 2015, Jones et al in prep). To characterize its near-IR populations; the data analysis method will follow that developed by M. Boyer, which has been successful employed to identify C and M stars in several local group galaxies spanning a range of metallicities, e.g. Boyer et al. (2013, 2017). Stellar Populations 0 false false false false true false false SUPPORTED GALAXY DWARF ELLIPTICAL ELLIPTICAL This is a star field of M32, with a wide range of V-mags. The field is centered on a RR Lyr star ([FCT2012] V74, V=24.846 mag, I = 24.456 mag.) We are targeting all AGB stars in the field (H < 21 mag); these range from approximately F814W=18-23 mag. NGC0221 J2000 J2000 16 < H mag < 21 GALAXY DWARF ELLIPTICAL ELLIPTICAL This is a star field of M32, with a wide range of V-mags. We are targeting all AGB stars in the field (H < 21 mag); these range from approximately F814W=18-23 mag. NGC0221 J2000 J2000 16 < H mag < 21 GALAXY DWARF ELLIPTICAL ELLIPTICAL This is a star field of M32, with a wide range of V-mags. We are targeting all AGB stars in the field (H < 21 mag); these range from approximately F814W=18-23 mag. NGC0221 J2000 J2000 16 < H mag < 21 GALAXY DWARF ELLIPTICAL ELLIPTICAL This is a star field of M32, with a wide range of V-mags. We are targeting all AGB stars in the field (H < 21 mag); these range from approximately F814W=18-23 mag. NGC0221 J2000 J2000 16 < H mag < 21 WFC3/IR Imaging No No F127M WFC3/IR Imaging No No F139M WFC3/IR Imaging No No F153M /Users/ojones/Desktop/M32_HST_Phase_II_v2/OP-cache/M32_HST_Phase_II_v2-v01.xml The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. -All three medium-band filters (F127M, F139M, F153M), in field. -~800s exposures per filter, using the STEP200 timing sequences. NSAMP = 8 -Using a 4pt dither for F127M, F139M and F153M. -Exposures arranged to avoid latency due to buffer dump. -Total of one orbit (Tic-Visit :proposal-id 15952 :visit-id "01" :proposal-version -1 :trans-version "20190514" :date "23-Jul-2019 16:22:15.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1915040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15952 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15952 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 /Users/ojones/Desktop/M32_HST_Phase_II_v2/OP-cache/M32_HST_Phase_II_v2-v05.xml The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. -All three medium-band filters (F127M, F139M, F153M), in field. -~800s exposures per filter, using the STEP200 timing sequences. NSAMP = 8 -Using a 4pt dither for F127M, F139M and F153M. -Exposures arranged to avoid latency due to buffer dump. -Total of one orbit (Tic-Visit :proposal-id 15952 :visit-id "05" :proposal-version -1 :trans-version "20190514" :date "23-Jul-2019 16:22:17.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1915040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15952 :visit-id "05" :obset-id "05" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15952 :visit-id "05" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 /Users/ojones/Desktop/M32_HST_Phase_II_v2/OP-cache/M32_HST_Phase_II_v2-v06.xml The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. -All three medium-band filters (F127M, F139M, F153M), in field. -~800s exposures per filter, using the STEP200 timing sequences. NSAMP = 8 -Using a 4pt dither for F127M, F139M and F153M. -Exposures arranged to avoid latency due to buffer dump. -Total of one orbit (Tic-Visit :proposal-id 15952 :visit-id "06" :proposal-version -1 :trans-version "20190514" :date "23-Jul-2019 16:22:21.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1915040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15952 :visit-id "06" :obset-id "06" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15952 :visit-id "06" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0 /Users/ojones/Desktop/M32_HST_Phase_II_v2/OP-cache/M32_HST_Phase_II_v2-v07.xml The scheduling data was generated by CASM 27.2. CASM was run in Phase II mode. -All three medium-band filters (F127M, F139M, F153M), in field. -~800s exposures per filter, using the STEP200 timing sequences. NSAMP = 8 -Using a 4pt dither for F127M, F139M and F153M. -Exposures arranged to avoid latency due to buffer dump. -Total of one orbit (Tic-Visit :proposal-id 15952 :visit-id "07" :proposal-version -1 :trans-version "20190514" :date "23-Jul-2019 16:22:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "30" :si-bright-earth-limb-angle 20.0 :data-volume 1915040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 15952 :visit-id "07" :obset-id "07" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 15952 :visit-id "07" :orbit-number 1 :pcs-time 333 :si-vis-utilization 2882 :al-overhead-at-end 0 :internal-dur-at-end 633 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3238 :pcs-gap 0 ) true 1 0