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First fringes on the E1-E2 Baseline of the CHARA Array
Text by Theo ten Brummelaar, 25 July 2002
Antonin Remond, Nils Turner, Theo ten Brummelaar, and Vincent Coude du Foresto
CHARA found first fringes using the two
telescope E1/E2 last Monday night [22 July 2002] at about 11pm. After solving a problem
with the tip/tilt system we started a scan and found the fringes after
only about 1 minute into the first scan. They where some 8 cm from the
model position. Tuesday night we collected data for the baseline
solution and got a residual of about 500 um RMS. The operational
baselines for CHARA are now:
| | East | North | UP | Baseline |
| E2 S1 | 70.376906 | 269.731463 | -2.817161 | 278.775729 |
| E2 S2 | 76.125299 | 236.150122 | -3.461041 | 248.140928 |
| E2 E1 | -54.939981 | -36.217176 | 3.113760 | 65.877013 |
| E1 S1 | 125.316887 | 305.948639 | -5.930921 | 330.672145 |
| E1 S2 | 131.065280 | 272.367298 | -6.574801 | 302.333063 |
| S2 S1 | -5.748393 | 33.581341 | 0.643880 | 34.075872 |
[The two remaining telescopes in the array, W1 and W2,
should have fringes later this summer. - PRL]
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Maintained by Peter Lawson
MS 301-451, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109
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