README web version of /home/usg/OPS/MTS/readme_xml/readme_75502700

Principal Investigator Email Address

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

Estimated Total Execution Time (hours, including overheads)

```
1.0
```

General Description

We are looking for the proper motion confirmation of a faint candidate
 companion to Alpha Cen B.
Its position, about 6" away from B, has been identified from a previous DDT run,
 and is marked
on our second finding chart FC_275C5027A_2.jpg. The observations should be obtained
 as soon
as possible due to the fast proper motion of B (about 4"/yr). The J2000.0 coordinates
 of B and of
the center of the western field take into account this motion, and were computed
for epoch 2005.6.
The observation procedure is as previously done during DDT runs 272.C-5010(A) and
 273.C-5041(A):
center Alpha Cen B in the field, and then offset the telescope by 10" to the west,
 in order to
bring Alpha Cen B at a distance of 3" from the eastern edge of the S13 camera field
 of view.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

Due to the fast proper motion of Alpha Cen, these observations should
 be done before the star disappears behind the sun (end of july).

Special Execution Requirements

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Special Calibration Information

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ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

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Source(s) of Pre-imaging

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Pre-imaging sources not listed above

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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
```

If you have PSF reference star OBs, do the names of those OBs begin with PSF_ ?

```
N/A
```

If there are Finding Charts attached to your OBs, is the field-of-view of at least one of these charts 2' x 2' (with clearly labelled field orientation) ?

Have you clearly marked and labelled your wavefront reference objects R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding Charts ?

Have you specified the magnitude of the brightest object in the field-of-view for each OB ?

Are there objects in any of your fields (including standard stars) which are brighter than the limits specified in the User Manual and on NACO web Pages ?

If the previous answer is yes, have you given a list of OBs and a justification for the brightness limit violation in the general description field ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:09 2009
If you have comments, please contact usd-help@eso.org