Note: in this ToO proposal we have specified the filter F160W for imaging, but
in the text we justify the possible use of other filters F140W, F125W, F110W, as
alternatives in certain circumstances.
This is a resubmission of prop ID 559.
491209019
Assigned ID: 559
----- Attempting Submission 1 (Fri Feb 25 19:45:03 GMT 2011) -----
HST Phase I Proposal 559 (highz_too_apt) successfully submitted.
----- Attempting Submission 2 (Sat Feb 26 19:23:25 GMT 2011) -----
Added a loose orient constraint.
733621623
----- Attempting Submission 1 (Thu Jul 07 20:33:59 GMT 2011) -----
----- Attempting Submission 2 (Mon Sep 24 14:08:55 GMT 2012) -----
----- Attempting Submission 3 (Mon Sep 24 21:11:25 GMT 2012) -----
----- Attempting Submission 4 (Fri Mar 15 17:07:35 GMT 2013) -----
HST Phase II Proposal 12558 (resubmit.apt) successfully submitted.
----- Attempting Submission 5 (Sat Mar 16 14:24:09 GMT 2013) -----
APT is telling me that Orbit Planner and Visit Planner need to be run, but it seems to me they have been. Let me know if there any issues. - NRT
Identifying and studying gamma-ray bursts at very high redshifts
Gamma-ray bursts are bright enough to be seen to very great distances and their afterglows can provide redshifts and positions for their host galaxies, and in some cases details of the host ISM and the IGM close to the burst. Thus GRBs offer a unique probe of early star formation and the galaxy populations in the era of reionization. Our efforts to identify high-z GRBs were rewarded with the discovery of GRB 090423 at redshift 8.2. However, it remains the case that some good candidate high-z GRBs cannot be followed up quickly or deeply enough with ground-based IR spectroscopy, and indeed it is likely for others the Ly-alpha break falls in difficult regions of the IR spectrum. GRB 090429B is an example, which had a photo-z of 9.4, but for which spectroscopy was curtailed due to bad weather. WFC3/IR on HST can obtain redshifts based on the location of the Ly-alpha break via slitless grism spectroscopy, to considerably deeper limits (and hence later times) than is possible from the ground, thus offering a solution to this problem. Our proposal aims to increase the efficiency of locating z>7 GRBs by performing such spectroscopy on up to two candidates for which photometry suggests they are very high-z, but where the redshift can not be secured from the ground. We also propose to monitor the afterglow of one z>7 GRB found, to allow comparison with the lower redshift population of bursts, and to perform an initial search for its host.
We propose to observe the locations of candidate or confirmed high-z GRBs using ACS/WFC or WFC3/IR. The aims are to i) determine or confirm redshifts via grism spectroscopy, ii) measure the late time lightcurves of the bursts and iii) characterize the nature of the host galaxies. We have therefore defined several observations
1) WFC3 grism spectroscopy. Visits GA-GF specify short exposures in F160W, followed by a 2 point dither observation using G102. The visits themselves will be triggered together and use POS-TARG offsets to recreate a 6-point dither pattern. Visits RA-RF are similar, but for candidate higher redshift events, and utilize G140L. The visits are 1 orbit long for scheduling convienience, but will be triggered together.
2) Short exposures for lightcurve monitoring, may be taken at similar times to spectroscopy. This includes 1 orbits (early) and 2 orbit (later) time observations of the afterglows in F125W, F140W and F160W. The preicse filters will be chosen at the time to optimally sample both lightcurve and SED.
3) Late time observations to charaterize the nature of the host galaxy, and provide a template for subtraction from early data. These observations will be ~4 orbits in duration, and will use one of the filters described above.
COSMOLOGY
12
false
false
0.0
0.0
false
false
false
SUPPORTED
UNIDENTIFIED
ACCRETION DISK
GAMMA RAY EMITTER
J2000
GRB at z>6
WFC3/IR
Spectroscopic
No
No
G102
WFC3/IR
Spectroscopic
No
No
G141
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F160W
WFC3/IR
Imaging
No
No
F160W
POS-TARG
DITHER
0.572
LINE
0.365
false
false
74.653
4
18.528
WFC3-IR-DITHER-BOX-MIN
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false
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DITHER
2
0.572
WFC3-IR-DITHER-LINE
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false
false
74.653
0.636
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18.528
POS-TARG
BOX
41.788
2
true
POS-TARG
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false
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Awaiting GRB trigger
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true
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Awaiting high-z GRB trigger
The scheduling data was generated by CASM 21.0.
CASM was run in Phase II mode.
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:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F1"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2840
:al-overhead-at-end 0
:internal-dur-at-end 519
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3233
:pcs-gap 0
)
false
1
0
The scheduling data was generated by CASM 20.2.
CASM was run in Phase II mode.
F140W, 2 orbit, 4 point dither
(Tic-Visit
:proposal-id 12558
:visit-id "F2"
:proposal-version -1
:trans-version "20120802"
:date "24-Sep-2012 22:09:53.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1236016
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12558
:visit-id "F2"
:obset-id "F2"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F2"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2710
: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 3229
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F2"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3000
:al-overhead-at-end 0
:internal-dur-at-end 443
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3229
:pcs-gap 0
)
true
2
0
Awaiting GRB trigger
The scheduling data was generated by CASM 21.0.
CASM was run in Phase II mode.
/private/var/folders/q_/v5nbzs1905bbt3hw3clh6tsw0000gn/T/OPVisit1209491490587161250.xml
4 orbit F140W, 8 point dither
(Tic-Visit
:proposal-id 12558
:visit-id "F3"
:proposal-version -1
:trans-version "20121031"
:date "16-Mar-2013 14:21:15.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 4
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 2089040
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12558
:visit-id "F3"
:obset-id "F3"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F3"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2710
: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 3233
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F3"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2710
: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 3233
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F3"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2710
: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 3233
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "F3"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2710
:al-overhead-at-end 0
:internal-dur-at-end 310
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3233
:pcs-gap 0
)
true
4
0
The scheduling data was generated by CASM 20.2.
CASM was run in Phase II mode.
F125W, 1 orbit, 4 point dither
(Tic-Visit
:proposal-id 12558
:visit-id "J1"
:proposal-version -1
:trans-version "20120802"
:date "24-Sep-2012 22:09:54.0"
: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 1044528
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12558
:visit-id "J1"
:obset-id "J1"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J1"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2840
:al-overhead-at-end 0
:internal-dur-at-end 519
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3233
:pcs-gap 0
)
true
1
0
Awaiting trigger
The scheduling data was generated by CASM 20.2.
CASM was run in Phase II mode.
F125W, 2 orbit, 4 point dither
(Tic-Visit
:proposal-id 12558
:visit-id "J2"
:proposal-version -1
:trans-version "20120802"
:date "24-Sep-2012 22:09:56.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 2
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 1236016
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12558
:visit-id "J2"
:obset-id "J2"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J2"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2710
: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 3229
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J2"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 3000
:al-overhead-at-end 0
:internal-dur-at-end 443
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3229
:pcs-gap 0
)
true
2
0
Awaiting GRB trigger
The scheduling data was generated by CASM 20.2.
CASM was run in Phase II mode.
4 orbit F125W, 8 point dither
(Tic-Visit
:proposal-id 12558
:visit-id "J3"
:proposal-version -1
:trans-version "20120802"
:date "24-Sep-2012 22:10:03.0"
:trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0
:FATAL-ERRORS 0 :CONTINUABLE-FATALS 0)
:number-of-orbits 4
:saa-model "30"
:si-bright-earth-limb-angle 20.0
:data-volume 2089040
:tdrss-contact-duration 0
:coron NIL
)
(Tic-Obset
:proposal-id 12558
:visit-id "J3"
:obset-id "J3"
:pcs-mode "FGS"
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J3"
:orbit-number 1
:pcs-time 333
:si-vis-utilization 2710
: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 3229
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J3"
:orbit-number 2
:pcs-time 222
:si-vis-utilization 2710
: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 3229
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J3"
:orbit-number 3
:pcs-time 222
:si-vis-utilization 2710
: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 3229
:pcs-gap 0
)
(Tic-Orbit
:proposal-id 12558
:visit-id "J3"
:orbit-number 4
:pcs-time 222
:si-vis-utilization 2710
:al-overhead-at-end 0
:internal-dur-at-end 310
:dark-offset NIL
:dark-utilization 0
:max-dark-utilization 1920
:low-sky "N"
:pcs-visibility 3229
:pcs-gap 0
)
true
4
0
Awaiting high-z GRB trigger