To:
S. Murray
From:
M. Zombeck
The
results of all the Vega calibration measurements through February, 2002 are
presented in the table below.
I
reanalyzed all the early observations, since they were reprocessed.
Boldfaced
numbers are observed count rates in counts per second.
The
count rates are remarkably constant in time, for the same location on a segment
(chip).
|
UVIS\DATE |
10/28/99 |
6/7/00 |
8/6/00 |
2/1/01 |
8/20-22/01
|
2/19-24/02
|
Prediction
|
HRC-I
|
< 7 x 10-4 |
< 7 x 10-4 |
no observation |
< 1 x 10-3 |
< 7 x 10-4 |
<2 x 10-3 |
7 x 10-4 |
|
|
|
|
|
|
|
|
|
|
Obsid |
1415 |
31 |
|
986 |
987 |
2588 |
|
|
|
|
|
|
|
|
|
|
|
HRC-S
Seg0
thick |
0.16 +/- 0.01 |
0.15 +/ 0.01 |
no observation |
0.14 +/- 0.01 |
0.16 +/- 0.01 |
0.16+/-0.01 |
1 |
|
Position |
Chip 2 Detect. coord. 32976, 32880 |
Chip 2 Detect. coord. 32912, 32624 |
|
Chip 2 Detector coord. 32880, 32784 |
Chip2 Detector coord. 32880,32784 |
Chip 2 Detector coord. 32880, 32784 |
|
|
Obsid |
1416 |
32 |
|
988 |
989 |
2589 |
|
|
HRC-S Seg0 thin |
253.0 +/- 0.4 |
no observation |
248.1 +/- 0.4 |
176.4 +/- 0.3 |
172.6 +/- 0.3 |
169.5+/-0.2 |
400 |
|
Position |
Chip 2 Detect.
Coord. 28432,
32816 |
|
Chip 2 Detector coord. 28464, 32720 |
Chip 2 Detector coord. 37456, 32752 |
Chip 2 Detector coord. 37456, 32752 |
Chip 2 Detector coord. 37456, 32784 |
|
|
Obsid |
1417 |
|
1805 |
990 |
991 |
2590 |
|
|
HRC-S
Seg1
thin |
483.5 +/- 0.7 |
no observation |
486.8 +/- 0.7 |
433.6 +/- 0.7 |
427.7 +/- 0.7 |
428.1+/-0.6 |
2000 |
|
Position |
Chip 3 Detect. Coord. 23888, 32848 |
|
Chip 3 Detector coord. 23984, 32688 |
Chip 1 Detector coord. 42128, 32752 |
Chip 1 Detector coord. 42032, 32752 |
Chip 1 Detector
coord. 42064, 32848 |
|
|
Obsid |
1418 |
|
1806 |
992 |
993 |
2591 |
|
|
HRC-S
Seg1
thick |
mispointed |
no observation |
< 7 x 10-4 |
mispointed |
no observation |
(2.3+/-5.6)x10--3 |
1 x 10-6 |
|
Obsid |
|
|
1807 |
|
|
2592 |
|