README web version of /home/usg/OPS/MTS/readme_xml/readme_77058701

Principal Investigator Email Address

```
pierre.kervella@obspm.fr
```

Estimated Total Execution Time (hours, including overheads)

```
2
```

General Description

This programme is the repetition of a previous observation of Alpha Centauri
 A&B (in P72). We use the gap between the two SUSI2 CCDs as a coarse coronagraph
 to avoid a massive saturation of the detector. Our goal is to detect companions
 through their common proper motion with the Alpha Centauri binary. This pair has
 a large proper motion by itself, with also a large parallactic oscillation. The
 coordinates given in the OBs (epoch 2006.3) take these motions into account and
 should result in an accurate centering of the star. The movetopixel operation should
 bring the brightest of the two stars (alpha Cen A) in the middle of the SUSI2 detector,
 inside the CCD gap. The rotator offset is set  in the OBsso that the two stars are
 aligned within the gap. It corresponds to the position angle of the binary on the
 sky. Though this angle changes slowly with time, the effect is insignificant over
 one ESO period.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

```
None
```

Special Execution Requirements

```
None
```

Special Calibration Information

```
None
```

ToO Information

```
Not a ToO
```

ToO Activators List

```
Not a ToO
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
None
```

Source(s) of Pre-imaging

---(Empty)---

Pre-imaging sources not listed above

---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed on the instrument-specific Phase 2 web page ?

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing Category for each Observing Template ?

```
N/A
```

Do all your finding charts comply with both the general and instrument-specific Phase 2 Web Pages ?

If you submitted OBs for standard stars, did you specify the magnitude and spectral type of all standard stars in the OBs ?

```
N/A
```

Have you included OBs for any calibrations that you need but which are not part of the Calibration Plan ?

```
N/A
```

If you are observing Moving Targets, have you attached suitable ephemeris files to your OBs?

```
N/A
```

If you have preferences which OBs should be executed first, did you make use of the User Priority field in the OBs ?

```
N/A
```

If this is a run that requires coordinated observations with other facilities, did you give proper instructions in the Time-Critical Aspects Section ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:13 2009
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