WFC3 SMOV Science Report
28 july 2009
This presentation contains material that is embargoed until after the SM4 ERO
press conference. Images/spectra of external (astronomical) objects may not
be altered, distributed, reproduced, published, displayed, or used in any other
way without the consent of the STScI Director or the HST Project.
WFC3 STATUS
Activity
PropID
Title
PI
Visits
Done
Total
Visits
Totals
316
428
Percent Complete
72%
Status
WF01
11454
Activation Test
LP
7
8
Done
WF08
11421
CSM Test
HB
2
2
Done
WF02
11357
Memory Test
ID
1
1
Done
WF03
11358
Sci Data Buffer Test
ID
13
14
Done
WF27/28
11549
UVIS & IR Pointing
Stability
TB
0
12
TBD
2
Activity
PropID
Title
PI
Visits Done
Total
Visits
Status
WF30
11443
FGS-IR Update
LD
1
1
Done
WF29
11442
FGS-UVIS Update
LD
1
1
Done
WF34
11447
IR Dark, Noise, Bkgnd
PM
13
22
Prelim Analysis
WF07
11420
IR Det Functional
PM
12
12
Analysis
WF05
n/a
IR Detector Cooldown
JM
0
0
Done
WF22
11435
IR Fine Alignment
GH
4
4
Done
WF40
11453
IR Flat Field Uniformity
BH
3
3
Analysis
WF10a
11423
IR FSM Test
SB
4
4
Done
WF42
11552
IR Grisms
HB
0
4
-
WF24
11437
IR Image Quality
GH
0
1
SMS 208
WF12
11425
IR Initial Alignment
GH
3
4
Done
WF20
11433
IR Int Flats
BH
50
50
Analysis
WF38
11451
IR Phot Zero Points
JK
6
8
Prelim Analysis
WF32
11445
IR Plate Scale
LD
1
2
Analysis
WF28
11441
IR Pointing Stability
TB
WF26
11439
IR PSF Wings
GH
0
1
SMS 208
WF36
11449
IR SAA Passage
AM
3
3
Analysis
WF10b
11543
IR Spare Tungsten Lamp
SB
4
4
Done
WF17
n/a
IR TEC Performance
LP
0
0
Analysis
CONTINGENCY
3
Activity
PropID
Title
PI
Visits
Done
Total
Visits
Status
WF44
11808
UVIS Bowtie Monitor
JM
72
100
WF04
n/a
UVIS CCD Cooldown
JM
0
0
Done
WF13
11426
UVIS Contam Monitor
SD
15
34
Ongoing
WF33
11446
UVIS Dark, Noise, Backgnd
SB
11
23
Prelim Analysis
WF06
11419
UVIS Det Functional
SB
12
12
Analysis
WF21
11434
UVIS Fine Alignment
GH
4
4
Done
WF39
11452
UVIS Flat Field Uniformity
ES
2
2
Analysis
WF18
11431
UVIS Hot Pixel Anneal
SB
6
6
Analysis
WF23
11436
UVIS Image Quality
GH
0
1
SMS 208
WF11
11424
UVIS Initial Alignment
GH
3
4
Done
WF19
11432
UVIS Int Flats
AR
54
66
Analysis
WF37
11450
UVIS Phot Zero Points
JK
3
4
Prelim Analysis
WF31
11444
UVIS Plate Scale
LD
2
2
Analysis
WF27
11440
UVIS Pointing Stability
TB
WF43
11798
UVIS PSF Core Modulation
ES
1
2
Analysis
WF25
11438
UVIS PSF Wings
GH
0
5
SMS 208
WF35
11448
UVIS SAA Passage
AM
3
3
Analysis
WF14
11427
UVIS Shutter Test
BH
3
3
Analysis
WF09a
11422
UVIS SOFA Test
SB
2
2
Done
WF09b
11529
UVIS Spare Tungsten Lamp
SB
2
2
Done
WF16
n/a
UVIS TEC Performance
LP
0
0
Analysis
WF15
11428
D2 Cal Lamp Test
SB
0
12
ON HOLD
Analysis
CONTINGENCY
4
WFC3 Science Status Summary
Parameter
UVIS Channel
IR Channel
Read Noise
2.9 – 3.1 e- (nominal)
13 -14 e- ramp (TBR)
Dark Current
1.5 e-/pix/hour (0.3 expected)
<0.1 e-/pix/second
Throughput
5 to 20% above ETC estimate
~10-15% above ETC
Phot Stability
<2% over 1 day and 1 week
TBD
Image Quality
SMS 208 (+ in VIS, close in UV)
SMS 208 (nominal)
Sky Bckgnd
TBD
In analysis
LOS Stability
Not yet measured
Not yet measured
Pointing
SIAF Update for 215
SIAF Update for 215
Astrometry
In analysis (draft IDCTAB)
In analysis (draft IDCTAB)
Flat Field
Uniformity
F225W < 3%; longer wavelength in Not yet measured
analysis
Grisms
Not yet measured
Not yet measured
5
WFC3 Engineering Status Summary
Parameter
UVIS Channel
IR Channel
Lamps
Tungsten verified; D2 TBD
Tungsten verified
Mechanisms
SOFA 1 step unstable; focus
wobble issue under investigation
Nominal
QEH
Bowtie mitigation works to ~0.5% Possible ~1% issue (TBD)
Thermal
Good margin on UVIS @ -83C
Under study
Anneal
Done 2x under SMS control; Hot
pixel removal >70%
N/A
Safing
Recovery
Stored commanding to be implemented in August with changes
to thermal limits checking
SAA Passage
Contours nominal
Contours nominal; 10%
pixels hit per minute in
SAA core.
6