README web version of /home/usg/OPS/MTS/readme_xml/readme_84050400

Principal Investigator Email Address

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

Estimated Total Execution Time (hours, including overheads)

```
1.5
```

General Description

This programme is the continuation of our monitoring of the orbital motion
 of the companion of Achernar A, that is about 30 times fainter than the primary
 and is probably within 0.1-0.2".

The two PSF OBs should be executed just before or after the two corresponding Achernar
 OBs. For all our OBs, we use the cube mode of NACO (waiver approved to use the cube
 mode in service mode). The exposure times we chose are identical to previously executed
 observations of this star (in January 2009), and should therefore not cause saturation
 (Achernar and delta Phe are not significantly variable).

The star images should be positioned if possible away from dead or hot pixels, and
 close to the center of the FOV for the 64x66 pixel images.

Waiver Requests

A waiver was submitted and approved to use the NACO cube mode in service
 mode.

Critical Observing Condition Constraints

```
NA
```

Time-Critical Aspects

```
NA
```

Special Execution Requirements

The four OB submitted for this programme should be executed by pair (science+PSF):
1- Achernar_64_JHK and PSF_DelPhe_64_JHK
2- Achernar_1024_HK and PSF_DelPhe_1024_HK

Special Calibration Information

```
NA
```

ToO Information

```
NA
```

ToO Activators List

```
NA
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
NA
```

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 ?

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_ ?

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 ?

```
N/A
```

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 15:40:32 2009
If you have comments, please contact usd-help@eso.org