README web version of /home/usg/OPS/MTS/readme_xml/readme_78069602

Principal Investigator Email Address

```
boekel@mpia.de
```

Estimated Total Execution Time (hours, including overheads)

```
2.7
```

General Description

The goal of this programme is to take optical spectra of
clusters of young stars, and link the properties of the stars to
those of their circumstellar disk as derived from IR observations.
We target several fields of which high quality Spitzer observations
exist, that show the presence of large numbers of stars with circumstellar
disks in various evolutionary stages.

The VIMOS observations are aimed at deriving spectral types, ages (LiI absorption)
and accretion characteristics (Halpha emission), allowing to link the properties
of the circumstellar disks to those of the central stars.

Waiver Requests

A waiver for late submission of the p2pp material was submitted and approved
 in september.
This was needed because at the time the IR data was not yet fully available and
 analyzed.
The IR data are essential for the best selection of the fields.

A waiver for a changes in pointing positions was submitted on 28 Nov 2006
and approved on 30 Nov 2006. Based on the analysis of the Spitzer data, we 
found some fields to be much more promissing than others, and the field selection
 
could be much improved with respect to the original selection (which was neccessarily
 
based on NIR data upto K-band only).

Critical Observing Condition Constraints

```
none
```

Time-Critical Aspects

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none
```

Special Execution Requirements

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none
```

Special Calibration Information

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none
```

ToO Information

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none
```

ToO Activators List

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none
```

Is this a Pre-imaging run ?

```
true
```

Pre-imaging Requirements

---(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 ?

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
```

Did you specify suitable guide stars for all your OBs using Guidecam ?

Did you check that the chosen guide stars are suitable for all the offset positions and that they do not produce unacceptable vignetting of the field of view ?

Last creation of page: Tue Oct 6 15:40:16 2009
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