Proposal 11445 (STScI Edit Number: 3, Created: Friday, September 5, 2008 8:12:52 PM EST) - Overview
11445 - WFC3 IR Plate Scale
Cycle: 17, Proposal Category: SM4/WFC3
(Availability Mode: RESTRICTED)
INVESTIGATORS
Name
Dr. Linda L. Dressel (PI)
Ms. Vera Platais (CoI)
Institution
Space Telescope Science Institute
Space Telescope Science Institute
E-Mail
dressel@stsci.edu
verap@stsci.edu
VISITS
Visit Targets used in Visit
Configurations used in Visit
Orbits Used Last Orbit Planner Run
01
(1) NGC104
WFC3/IR
4
05-Sep-2008 21:12:37.0
OP Current
with Visit?
yes
02
(2) LMC-FIELD-1
WFC3/IR
1
05-Sep-2008 21:12:49.0
yes
5 Total Orbits Used
ABSTRACT
The geometric scale factors and distortion of the IR detector will be measured using multiple pointing observations of the globular cluster 47 Tucanae
(NGC 104) to image moderately dense stellar fields. A grid of 16 pointings will be used. Extra exposures will be made to asses the impact of
increased exposure time. Half-pixel dithers will be used to test the accuracy of measuring stellar positions from undersampled psfs. A
complementary observation of a well studied field in the LMC will be made in one orbit.
Centroid position of stars will be used to tie down the geometric distortion to about 0.2 pixels across the field of each detector. Well measured
distortion-corrected positions of stars previously determined for these fields will be used in the derivation of the distortion equation coefficients.
Proposal 11445 (STScI Edit Number: 3, Created: Friday, September 5, 2008 8:12:52 PM EST) - Overview
This proposal is activity ID WFC3-32.
OBSERVING DESCRIPTION
The field in NGC104 will be sampled at scales of 137, 274, and 411 pixels in each coordinate. The LMC field will also be sampled on a coarse grid.
ADDITIONAL COMMENTS
A single set of guidestars should be used for each visit.
This proposal must follow successful implementation of proposal 11435 (WFC3 IR Fine Alignment).
2
Fixed Targets
Visit
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
Proposal 11445, Visit 01, implementation
Diagnostic Status: No Diagnostics
Scientific Instruments: WFC3/IR
Special Requirements: (none)
#
Name
Target Coordinates
(1)
NGC104
RA: 00 22 38.5000 (5.6604167d)
Alt Name1: 47TUC
Dec: -72 04 4.00 (-72.06778d)
Equinox: J2000
#
1
2
3
Exposures
4
5
6
7
8
9
10
Label
Target
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
Sat Sep 06 01:12:52 GMT 2008
Targ. Coord. Corrections
Config,Mode,Aperture
Spectral Els.
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
Opt. Params.
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
Fluxes
V=17.5
Miscellaneous
Reference Frame: ICRS
Special Reqs.
Groups
Exp. Time/[Actual Dur.]
POS TARG -9.28,8. Sequence 1-1 Non-In [==>(Copy 1)]
29
t
[==>(Copy 2)]
[1]
POS TARG 9.28,8.2 Sequence 2-2 Non-In [==>(Copy 1)]
9
t
[==>(Copy 2)]
[1]
POS TARG 9.28,-8. Sequence 3-3 Non-In [==>(Copy 1)]
29
t
[==>(Copy 2)]
[1]
POS TARG -9.28,-8. Sequence 4-7 Non-In [==>(Copy 1)]
29
t
[==>(Copy 2)]
[==>(Copy 3)]
SAMP-SEQ=STEP2 POS TARG -9.212,- Sequence 4-7 Non-In [==>]
5;
8.29
t
NSAMP=15
SAMP-SEQ=STEP2 POS TARG -9.212,- Sequence 4-7 Non-In [==>]
5;
8.229
t
NSAMP=15
SAMP-SEQ=STEP2 POS TARG -9.28,-8. Sequence 4-7 Non-In [==>]
5;
229
t
NSAMP=15
SAMP-SEQ=STEP2 POS TARG -27.83,[==>]
5;
8.29
NSAMP=15
SAMP-SEQ=STEP2 POS TARG -27.83,8
[==>]
5;
.29
NSAMP=15
SAMP-SEQ=STEP2 POS TARG -27.83,2
[==>]
5;
4.87
NSAMP=15
3
Orbit
[2]
[2]
[2]
[2]
[3]
[3]
[3]
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
#
11
12
Exposures (continued)
13
14
15
16
17
18
19
Label
Target
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
(1) NGC104
Config,Mode,Aperture
Spectral Els.
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
Opt. Params.
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
SAMP-SEQ=STEP2
5;
NSAMP=15
4
Special Reqs.
Groups
POS TARG -9.28,24
.87
Exp. Time/[Actual Dur.]
POS TARG 9.28,24.
87
[==>]
POS TARG 27.83,24
.87
[==>]
POS TARG 27.83,8.
29
[==>]
POS TARG 27.83,-8
.29
[==>]
POS TARG 27.83,-2
4.87
[==>]
POS TARG 9.28,-24
.87
[==>]
POS TARG -9.28,-2
4.87
[==>]
POS TARG -27.83,24.87
[==>]
Orbit
[==>]
[3]
[3]
[3]
[4]
[4]
[4]
[4]
[4]
[4]
Orbit Structure
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
5
Orbit Structure (continued)
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
6
Orbit Structure (continued)
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
7
Orbit Structure (continued)
Proposal 11445 - Visit 01 - WFC3 IR Plate Scale
8
Fixed Targets
Visit
Proposal 11445 - Visit 02 - WFC3 IR Plate Scale
Proposal 11445, Visit 02, implementation
Diagnostic Status: No Diagnostics
Scientific Instruments: WFC3/IR
Special Requirements: (none)
#
Name
Target Coordinates
(2)
LMC-FIELD-1
RA: 05 21 57.6500 (80.4902083d)
Dec: -69 29 54.11 (-69.49836d)
Equinox: J2000
#
1
2
Exposures
3
4
5
6
7
8
Label
Target
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
(2) LMC-FIELD-1
Sat Sep 06 01:12:55 GMT 2008
Targ. Coord. Corrections
Config,Mode,Aperture
Spectral Els.
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
WFC3/IR, MULTIACCUM, IR-FIX F160W
Opt. Params.
SAMP-SEQ=SPARS
10;
NSAMP=10
Fluxes
V=23.0
Special Reqs.
Groups
POS TARG 0,12.435
;
GS ACQ SCENARI
O BASE1B3
SAMP-SEQ=SPARS POS TARG 27.83,24
10;
.87
NSAMP=10
SAMP-SEQ=SPARS POS TARG 27.83,0
10;
NSAMP=10
SAMP-SEQ=SPARS POS TARG 27.83,-2
10;
4.87
NSAMP=10
SAMP-SEQ=SPARS POS TARG 0,-12.43
10;
5
NSAMP=10
SAMP-SEQ=SPARS POS TARG -27.83,10;
24.87
NSAMP=10
SAMP-SEQ=SPARS POS TARG -27.83,0
10;
NSAMP=10
SAMP-SEQ=SPARS POS TARG -27.83,2
10;
4.87
NSAMP=10
9
Miscellaneous
Reference Frame: ICRS
Exp. Time/[Actual Dur.]
Orbit
[==>]
[1]
[==>]
[1]
[==>]
[1]
[==>]
[1]
[==>]
[1]
[==>]
[1]
[==>]
[1]
[==>]
[1]
Orbit Structure
Proposal 11445 - Visit 02 - WFC3 IR Plate Scale
10