15173( 3) - 18-Dec-2018 23:40:52 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 15173 Version: 3 Check-in Time: 18-Dec-2018 23:40:52 STScI Edit Number: 0 Title Linking Dynamical and Stellar Evolution in the Metal-Poor Globular Cluster M92 ------------------------------------------------------------------------------------ Type Cycle GO 25 ------------------------------------------------------------------------------------ Investigators Contact? PI: Dr. Jason S. Kalirai The Johns Hopkins University Applied Y Physics Laboratory CoI: Dr. Jeremy Heyl University of British Columbia N CoI: Dr. Harvey B. Richer University of British Columbia N CoI: Dr. Laura L. Watkins European Southern Observatory - Germany N CoI: Dr. Paola Marigo Universita degli Studi di Padova N CoI: Dr. Pier-Emmanuel Tremblay The University of Warwick N CoI: Dr. Jeffrey Cummings The Johns Hopkins University N CoI: Dr. Matteo Correnti Space Telescope Science Institute N CoI: Dr. Roger Cohen Space Telescope Science Institute N CoI: Dr. Olivia Jones United Kingdom Astronomy Technology Centre N CoI: Dr. Adam Riess The Johns Hopkins University N ------------------------------------------------------------------------------------ Abstract We propose a 5 orbit HST program to acquire UV imaging at the center of the ancient, metal-poor globular cluster NGC 6341 (M92). Our program is designed to achieve two science goals with a single data set, 1.) to directly measure the diffusion of stars through the massive cluster's core, 2.) to pinpoint the phase of post main-sequence evolution at which [Fe/H] = -2.3 stars lose their mass. Our novel technique will achieve these goals by using the full power of WFC3's exquisite UV sensitivity at <0.3 microns combined with its high spatial resolution. We will uncover ~1000 newly-formed white dwarfs in the center of M92 and track how their spatial distribution changes as they get "older" on the cooling sequence. Having just experienced significant mass loss, the youngest remnants with ages <10s of Myr will still be moving slowly like their 0.8 Msun progenitors, whereas the "older" remnants with t_cool > 100s Myr will be fully relaxed. Using the methodology we developed and successfully applied to 47 Tuc (Heyl et al. 2015a; 2015b), we will "watch" this dynamical evolution to measure the diffusion coefficient due to gravitational relaxation in the cluster's core and the past timing of stellar mass loss that was responsible for the current cluster mass segregation profile. M92 is the ideal target for this study as it complements our existing study of the relatively metal-rich cluster 47 Tuc; it has an extremely low metallicity of [Fe/H] = -2.3, very low foreground reddening (E(B-V) = 0.02), moderate concentration index, and a theoretically-expected relaxation timescale in its core of 90 Myr, which nicely splits the young and old white dwarfs that can be observed with Hubble. ------------------------------------------------------------------------------------ Observations Description ------------------------ This is a 5 orbit program that we would like to execute in one block. The primary camera is HST/WFC3/UVIS and the parallel camera is ACS. We are using two filters in both instrument. The observations are sequenced to obtain 4 15173( 3) - 18-Dec-2018 23:40:52 - [ 2] integrations on both cameras in each orbit, hiding all of the buffer dumps. This includes short integrations on WFC3/UVIS to mitigate saturation of bright sources. All observations are dithered. There are also orient constraints to line up the observations with one of the archival data sets from GO-13297 that have to be coadded to our data. ------------------------------------------------------------------------------------ 15173( 3) - 18-Dec-2018 23:40:52 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 2 M-92 STELLAR CLUSTER, RA=17H17M7.3900S, J2000 V = 6.52 GLOBULAR CLUSTER DEC=+43D08'9.40" Reference Frame: Other: SIMBAD Comments: This object was generated by the targetselector and retrieved from the SIMBAD database. ------------------------------------------------------------------------------------------------------------------------------------ 15173( 3) - 18-Dec-2018 23:40:52 - [ 4] Visit: 01 Visit Requirements: ORIENT 49D TO 51 D; ORIENT 139D TO 141 D On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 30 S POS TARG 0, -15; PAR 3 S ER see below WITH 1-2 (30 S) ------------------------------------------------------------------------------------------------------------------------------------ 2 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 820 S POS TARG 0, -15 S ER see below (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 3 M-92 ACS/WFC ACCUM WFC F435W 1 800 S see below (880 S) ------------------------------------------------------------------------------------------------------------------------------------ 4 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 810 S POS TARG 0.158, -15.070; S ER see below PAR 5 WITH 4 (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 5 M-92 ACS/WFC ACCUM WFC F435W 1 700 S see below (740 S) ------------------------------------------------------------------------------------------------------------------------------------ 6 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 830 S POS TARG 0.099, -15.165; S ER see below PAR 7 WITH 6 (820 S) ------------------------------------------------------------------------------------------------------------------------------------ 7 M-92 ACS/WFC ACCUM WFC F435W 1 700 S see below (660 S) ------------------------------------------------------------------------------------------------------------------------------------ 8 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 30 S POS TARG -0.120, S ER see below -15.358; PAR 10 WITH 8-9 (30 S) ------------------------------------------------------------------------------------------------------------------------------------ 9 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG -0.120, -15.358 S ER see below (805 S) ------------------------------------------------------------------------------------------------------------------------------------ 10 M-92 ACS/WFC ACCUM WFC F435W 1 900 S see below (920 S) ------------------------------------------------------------------------------------------------------------------------------------ 15173( 3) - 18-Dec-2018 23:40:52 - [ 5] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 11 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG -0.6, -15.50; S ER see below PAR 12 WITH 11 (835 S) ------------------------------------------------------------------------------------------------------------------------------------ 12 M-92 ACS/WFC ACCUM WFC F435W 1 800 S see below (820 S) ------------------------------------------------------------------------------------------------------------------------------------ 13 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG -1.1, -15.71; S ER see below PAR 14 WITH 13 (835 S) ------------------------------------------------------------------------------------------------------------------------------------ 14 M-92 ACS/WFC ACCUM WFC F435W 1 740 S see below (700 S) ------------------------------------------------------------------------------------------------------------------------------------ 15 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 30 S POS TARG 0, -17.21; PAR S ER see below 17 WITH 15-16 (30 S) ------------------------------------------------------------------------------------------------------------------------------------ 16 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG 0, -17.21 S ER see below (805 S) ------------------------------------------------------------------------------------------------------------------------------------ 17 M-92 ACS/WFC ACCUM WFC F435W 1 900 S see below (920 S) ------------------------------------------------------------------------------------------------------------------------------------ 18 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG 0.158, -17.28; S ER see below PAR 19 WITH 18 (835 S) ------------------------------------------------------------------------------------------------------------------------------------ 19 M-92 ACS/WFC ACCUM WFC F435W 1 800 S see below (820 S) ------------------------------------------------------------------------------------------------------------------------------------ 20 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 870 S POS TARG 0.099, -17.375; S ER see below PAR 21 WITH 20 (835 S) ------------------------------------------------------------------------------------------------------------------------------------ 21 M-92 ACS/WFC ACCUM WFC F435W 1 740 S see below (700 S) ------------------------------------------------------------------------------------------------------------------------------------ 22 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 30 S POS TARG 0, -15; PAR 24 S ER see below WITH 22-23 (30 S) 15173( 3) - 18-Dec-2018 23:40:52 - [ 6] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------------------ 23 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 870 S POS TARG 0, -15 S ER see below (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 24 M-92 ACS/WFC ACCUM WFC F555W 1 900 S see below (920 S) ------------------------------------------------------------------------------------------------------------------------------------ 25 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 860 S POS TARG -0.7, -17.10; S ER see below PAR 26 WITH 25 (805 S) ------------------------------------------------------------------------------------------------------------------------------------ 26 M-92 ACS/WFC ACCUM WFC F555W 1 800 S see below (820 S) ------------------------------------------------------------------------------------------------------------------------------------ 27 M-92 WFC3/UVI ACCUM UVIS-CENT F225W FLASH=12 1 840 S POS TARG -0.4, -16.80; S ER see below PAR 28 WITH 27 (815 S) ------------------------------------------------------------------------------------------------------------------------------------ 28 M-92 ACS/WFC ACCUM WFC F555W 1 700 S see below (680 S) ------------------------------------------------------------------------------------------------------------------------------------ 29 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 30 S POS TARG 0.158, -16.303; S ER see below PAR 31 WITH 29-30 (30 S) ------------------------------------------------------------------------------------------------------------------------------------ 30 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 870 S POS TARG 0.158, -16.303 S ER see below (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 31 M-92 ACS/WFC ACCUM WFC F555W 1 900 S see below (980 S) ------------------------------------------------------------------------------------------------------------------------------------ 32 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 850 S POS TARG 0.099, -16.398; S ER see below PAR 33 WITH 32 (815 S) ------------------------------------------------------------------------------------------------------------------------------------ 33 M-92 ACS/WFC ACCUM WFC F555W 1 800 S see below (800 S) ------------------------------------------------------------------------------------------------------------------------------------ 15173( 3) - 18-Dec-2018 23:40:52 - [ 7] Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 34 M-92 WFC3/UVI ACCUM UVIS-CENT F275W FLASH=12 1 860 S POS TARG -0.060, S ER see below -16.531; PAR 35 WITH 34 (825 S) ------------------------------------------------------------------------------------------------------------------------------------ 35 M-92 ACS/WFC ACCUM WFC F555W 1 740 S see below (700 S) ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ M-92 1 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 30.0 S S TER M-92 2 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 800.0 S S TER M-92 3 ACS/WFC ACCUM WFC F435W none none none none 1 880.0 S M-92 4 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 800.0 S S TER M-92 5 ACS/WFC ACCUM WFC F435W none none none none 1 740.0 S M-92 6 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 1 820.0 S S TER M-92 7 ACS/WFC ACCUM WFC F435W none none none none 1 660.0 S M-92 8 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 2 30.0 S S TER M-92 9 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 2 805.0 S S TER M-92 10 ACS/WFC ACCUM WFC F435W none none none none 2 920.0 S M-92 11 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 2 835.0 S S TER M-92 12 ACS/WFC ACCUM WFC F435W none none none none 2 820.0 S M-92 13 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 2 835.0 S S TER M-92 14 ACS/WFC ACCUM WFC F435W none none none none 2 700.0 S M-92 15 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 3 30.0 S S TER M-92 16 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 3 805.0 S S TER M-92 17 ACS/WFC ACCUM WFC F435W none none none none 3 920.0 S M-92 18 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 3 835.0 S S TER M-92 19 ACS/WFC ACCUM WFC F435W none none none none 3 820.0 S M-92 20 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 3 835.0 S S TER M-92 21 ACS/WFC ACCUM WFC F435W none none none none 3 700.0 S 15173( 3) - 18-Dec-2018 23:40:52 - [ 8] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ M-92 22 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 4 30.0 S S TER M-92 23 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 4 800.0 S S TER M-92 24 ACS/WFC ACCUM WFC F555W none none none none 4 920.0 S M-92 25 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 4 805.0 S S TER M-92 26 ACS/WFC ACCUM WFC F555W none none none none 4 820.0 S M-92 27 WFC3/UVI ACCUM UVIS-CEN F225W none none none none 4 815.0 S S TER M-92 28 ACS/WFC ACCUM WFC F555W none none none none 4 680.0 S M-92 29 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 5 30.0 S S TER M-92 30 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 5 800.0 S S TER M-92 31 ACS/WFC ACCUM WFC F555W none none none none 5 980.0 S M-92 32 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 5 815.0 S S TER M-92 33 ACS/WFC ACCUM WFC F555W none none none none 5 800.0 S M-92 34 WFC3/UVI ACCUM UVIS-CEN F275W none none none none 5 825.0 S S TER M-92 35 ACS/WFC ACCUM WFC F555W none none none none 5 700.0 S 15173( 3) - 18-Dec-2018 23:40:52 - [ 9] Summary Form for Proposal 15173 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures UVIS-CENTER, WFC ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/WFC, WFC3/UVIS ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters FLASH=12 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements ORIENT 139D TO 141 D, ORIENT 49D TO 51 D, PAR 10 WITH 8-9, PAR 12 WITH 11, PAR 14 WITH 13, PAR 17 WITH 15-16, PAR 19 WITH 18, PAR 21 WITH 20, PAR 24 WITH 22-23, PAR 26 WITH 25, PAR 28 WITH 27, PAR 3 WITH 1-2, PAR 31 WITH 29-30, PAR 33 WITH 32, PAR 35 WITH 34, PAR 5 WITH 4, PAR 7 WITH 6, POS TARG -0.060, -16.531, POS TARG -0.120, -15.358, POS TARG -0.4, -16.80, POS TARG -0.6, -15.50, POS TARG -0.7, -17.10, POS TARG -1.1, -15.71, POS TARG 0, -15, POS TARG 0, -17.21, POS TARG 0.099, -15.165, POS TARG 0.099, -16.398, POS TARG 0.099, -17.375, POS TARG 0.158, -15.070, POS TARG 0.158, -16.303, POS TARG 0.158, -17.28 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F225W, F275W, F435W, F555W ------------------------------------------------------------------------------------------------------------------------------------ Target Names M-92 ------------------------------------------------------------------------------------------------------------------------------------