README web version of /home/usg/OPS/MTS/readme_xml/readme_81057200

Principal Investigator Email Address

```
brandner@mpia.de
```

Estimated Total Execution Time (hours, including overheads)

```
10 hr
```

General Description

We will use NACO with S27 and the Ks filter to image 5 fields each in
 the starburst cluster NGC 3603 and Westerlund 1 starburst cluster. The aim of the
 programme is to obtain high precision astrometry, which - when mapped against 2nd
 epoch data - will enable us to distinguish cluster members from field stars based
 on proper motions. Small smaller dither offsets have been selected in order to optimize
 the accuracy of the astrometry. At the end of each OB, 5 dithered positions in a
 nearby, relatively empty sky field, will be obtained in open loop to facilitate
 dark and sky subtraction. 5 dither positions for the sky are sufficient, as the
 observations of NGC 3603 and Westerlund 1 are crowding limited rather than sky limited.

For some of the OBs, more than one possible reference stars have been indicated.
 For the center of NGC 3603 ("Field 1"), three bright stars are identified. They
 are ordered in increasing distance from the cluster center. In case good and stable
 AO perfromance cannot be reached because of crowding on R1, please try R2. In case
 crowding also prevents a stable AO loop with R2, please use R3, which is located
 about 20 arcsec to the North of the cluster center.

Waiver Requests

A waiver to extend the Phase 2 submission deadline has been submitted
 to and approved by ESO.

Critical Observing Condition Constraints

```
N/A
```

Time-Critical Aspects

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N/A
```

Special Execution Requirements

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N/A
```

Special Calibration Information

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N/A
```

ToO Information

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N/A
```

ToO Activators List

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N/A
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
N/A
```

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
```

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 15:40:24 2009
If you have comments, please contact usd-help@eso.org