0
Assigned ID: 635
----- Attempting Submission 1 (Fri Apr 07 16:43:33 GMT 2017) -----
This is a resubmission with a change from SCHED50 to SCHED100 for visits 1-3 as instructed to aid with scheduling.
1676564262
----- Attempting Submission 1 (Thu Jul 20 18:21:11 GMT 2017) -----
----- Attempting Submission 2 (Thu Dec 21 10:39:43 GMT 2017) -----
HST Phase II Proposal 15100 (15100_5orbit_final.apt) successfully submitted.
Receipt: # 15100-2
----- Attempting Submission 3 (Thu Dec 21 22:52:52 GMT 2017) -----
----- Attempting Submission 4 (Tue Jan 02 15:23:30 GMT 2018) -----
Mapping the escaping ionizing flux of Lyman continuum galaxies
We propose WFC3 imaging to map the origin and extent of escaping ionizing (< 912 A) flux for ~50 z ~ 3-4 Lyman continuum galaxies (LCGs) in the COSMOS field. LCGs are a recently identified population of galaxies selected via 30-band photometry and deep spectroscopy that exhibit excess Lyman continuum (LyC; < 912 A) flux. In this program, we will observe 2 WFC3 pointings to gather a statistical sample of the the full population. The data will (1) map the full LyC flux extent and origin, (2) measure the LyC flux as a function of galaxy luminosity, morphology, UV continuum slope, and Lya emission for the spectroscopic subset, and (3) secure the number density of this newly identified population of galaxies. This is the first systematic investigation of a z = 3-4 galaxy population analog to z > 6 galaxies responsible for cosmic reionization. LCG ionizing flux measurements will be used with our Keck/MOSFIRE restframe optical spectroscopic program to calibrate models that predict the escaping ionizing photon fraction based on nebular emission line strength ratios. The method will be used to infer galaxy ionizing photon escape fractions near, and beyond, the epoch of reionization using JWST, as direct measurements of < 912A photons at z > 5 are impossible as a result of IGM absorption. Complete LyC flux measurements, including the full extent and physical origin of the ionizing flux for proper calibration of the models at z ~ 3-4 can only be done with HST imaging.
This program consists of two primary and parallel fields in the COSMOS footprint. Each field has15 orbits split into three 5-orbit visits. The prime observations image with WFC3/UVIS and the F336W filter and the parallel observations image with ACS/WFC and the F435W filter. The orients are constrained in order to accommodate the targets in the primary WFC3 fields. As described in the Phase I, the WFC3/UVIS charge transfer efficiency (CTE) is degrading with time, and therefore observations need to be acquired as soon as possible. There is a relatively bright star (U ~ 15.5 and V ~ 14.1) just off detector chip 2 (quadrant C). However, previous observations with bright stars at that location did not result in significant "dragon's breath" flux.
Prime imaging - WFC3 F336W: Exposures are post-flashed by 4e- to help mitigate the CTE observed with WFC3/UVIS. Such long exposures achieve >12e- per pixel. The 15 orbits for F336W imaging are broken into three visits of five orbits. One exposure per orbit increases the background flux to reduce the required post-flash and to maximize the total depth, as compared to half-orbit exposures (by ~0.5 mag). A minimum of eight exposures (8 orbits) is necessary to properly clean the full orbit exposures of cosmic rays. In addition, five orbits per visit result in much better alignment of objects in the UV images and cosmic ray rejection. The dither pattern per visit is set 5 times larger than the default box pattern to help minimize the blotchy pattern observed in F336W imaging (i.e., similar to that seen in Rafelski et al. 2015, AJ, 150 31, Figure 15). Reducing CTE effects and blotchy patterns are important for our science targeting extremely faint, potentially diffuse fux from high redshift galaxies. Each visit adopts a 3pt dither line pointing using pos-targs to fill in chip gaps for WFC3 and the parallel ACS observations.
Parallel imaging - ACS F435W: The parallel imaging complements the F336W observations by targeting z ~ 4 galaxies. The 15 orbits will have three visits per target, with two exposures per orbit. The F435W background is sufficient that no post-flash is necessary. The dither patterns chosen will accommodate the ACS chip gap as described above.
Galaxies and the IGM
6
false
false
false
false
false
false
SUPPORTED
GALAXY
HIGH REDSHIFT GALAXY
J2000
J2000
GALAXY
HIGH REDSHIFT GALAXY
J2000
J2000
GALAXY
HIGH REDSHIFT GALAXY
J2000
J2000
WFC3/UVIS
Imaging
No
No
F336W
WFC3/UVIS
Imaging
No
No
F336W
POS-TARG
DITHER
0.865
LINE
0.56
false
false
81.785
4
23.884
WFC3-UVIS-DITHER-BOX
1
false
Hst Same orient constraint links visits (01 02 03)
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
1519189094000
10.0
(Tic-Visit
:proposal-id 15100
:visit-id "01"
:proposal-version -1
:trans-version "20171009"
:date "14-Feb-2018 14:49:05.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "01"
:obset-id "01"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "01"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2645
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2978
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "01"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2756
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2978
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "01"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2756
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2978
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "01"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2756
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2978
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "01"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2756
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 2978
:pcs-gap 0
)
false
5
0
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
/private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit3006058530201611429.xml
(Tic-Visit
:proposal-id 15100
:visit-id "02"
:proposal-version -1
:trans-version "20171009"
:date "28-Feb-2018 14:45:22.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "02"
:obset-id "02"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "02"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2869
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "02"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "02"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "02"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "02"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
true
5
0
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
/private/var/folders/z3/xy_g1v_s5fz9yrhzb8thz4cr0001qc/T/OPVisit5251974755640550952.xml
(Tic-Visit
:proposal-id 15100
:visit-id "03"
:proposal-version -1
:trans-version "20171009"
:date "28-Feb-2018 14:47:10.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "03"
:obset-id "03"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "03"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2869
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "03"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "03"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "03"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "03"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
true
5
0
Hst Same orient constraint links visits (04 05 06)
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
1520516385000
83.0
(Tic-Visit
:proposal-id 15100
:visit-id "04"
:proposal-version -1
:trans-version "20171009"
:date "21-Dec-2017 17:49:32.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "04"
:obset-id "04"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "04"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2869
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "04"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "04"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "04"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "04"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
5
0
Hst Same orient constraint links visits (04 05 06)
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
1520590772000
83.0
(Tic-Visit
:proposal-id 15100
:visit-id "05"
:proposal-version -1
:trans-version "20171009"
:date "21-Dec-2017 17:49:35.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "05"
:obset-id "05"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "05"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2869
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "05"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "05"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "05"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "05"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
5
0
Hst Same orient constraint links visits (04 05 06)
The scheduling data was generated by CASM 25.2.
CASM was run in Phase II mode.
1520682326000
83.0
(Tic-Visit
:proposal-id 15100
:visit-id "06"
:proposal-version -1
:trans-version "20171009"
:date "21-Dec-2017 17:49:39.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 5
:saa-model "29"
:si-bright-earth-limb-angle 20.0
:data-volume 4285968
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 15100
:visit-id "06"
:obset-id "06"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 15100
:visit-id "06"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2869
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "06"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "06"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "06"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 0
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 15100
:visit-id "06"
:orbit-number 5
:pcs-time 222
:si-vis-utilization 2980
:al-overhead-at-end 120
:internal-dur-at-end 699
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3202
:pcs-gap 0
)
false
5
0