The image quality of the Southern African Large Telescope (SALT)

The image quality of the Southern African Large Telescope (SALT)

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Image of Pinhole
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as point source
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mounting
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shining
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MS
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shining
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!
Best
Nominal 1514 - MS system
Best
MS tilted by 0.1 deg
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-1.0
0.0
1.0
2.0
Pinhole V Position
3.0
4.0
5.0
0.0
7.0
0.0
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M5 w.r.t. M4 radial gauges
Top: 1 o'clock Centre: 5 o'clock Bottom: 9 o'clock
0.070
0.050
I
0.030
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v%,____
V V VV V V VU V V VU
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21:00
21:15
21:30
21:20
21:40
21:50
22:00
Time
MS w.r.t. M4 radial gauges
Top: 1 o'clock Centre: 5 o'clock Bottom: 9 o'clock
0.050
0.070
0.550
— 0.050
0.040
0.030
0.020
0.0 10
0.000
22:00
22:10
22:20
22:30
22:40
22:50
23:00
23:10
23:20
23:30
22:40
Time
23:50
00:00
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1.60
2.00
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5.60
6.00
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0220
Bolts re-tightened
01
0.170
00
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0.125
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0.075
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0.025
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0
Al
05
00
Cl
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Al
1
-0.075
—11:
AS
Al
01
0
0
05
05
Bolts slackened
-0.125
0.40
0.40
0.00
0.00
0.60
Time (days)
0.60
0.70
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