README web version of /home/usg/OPS/MTS/readme_xml/readme_75037900

Principal Investigator Email Address

```
tkendall@obs.ujf-grenoble.fr
```

Estimated Total Execution Time (hours, including overheads)

```
03h42m20s
```

General Description

This program is designed to seek putative small, dense stellar clusters
 around the two target objects, which exhibit the characteristics of massive young
 OB stars. The targets are sufficiently bright that they can themselves be used as
 the wavefront reference for NAOS/CONICA, although the IR wavefront sensor must be
 used; the objects are deeply embedded behing several tens of magnitudes of visual
 extinction and are optically invisible. For the brightest target IRAS18079-1756,
 the NAOS PS .aocfg file uses the K dichroic and IR WHS to allow wavefront sensing
 at K whiler observations are made at H and narrow-band 1.28 micron (Pa beta). This
 did not prove possible with the fainter source IRAS17175-3544, and the N90C10 dichroic
 had to be used. The objects themselves, with H = 11.1 and 14 respectively, are the
 brightest targets in the 14" S13 camera field (small box on the FCs). These are
 2MASS H magnitudes; the objects have extremely red colours.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

The program can be carried out under THN conditions but requires 0.6"
 seeing

Time-Critical Aspects

```
None
```

Special Execution Requirements

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Special Calibration Information

```
No special calibrations are required
```

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

---(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 15:40:07 2009
If you have comments, please contact usd-help@eso.org