README web version of /home/usg/OPS/MTS/readme_xml/readme_77050200

Principal Investigator Email Address

```
weigelt@mpifr-bonn.mpg.de
```

Estimated Total Execution Time (hours, including overheads)

```
5
```

General Description

Medium spectral resolution VLTI/AMBER interferometry of Eta Carinae's
 optically thick stellar wind and test of the predicted binary nature at apastron.

Eta Carinae is the dominant star in the extended (approx. 15x10 arcsec), bright
 Homunculus nebula. Earlier AMBER observations showed that the AO system is able
 to properly operate in spite of the high surface brightness of the Homunculus nebula.

Waiver Requests

Waiver Request was submitted and approved: 077.D-0502A.01.WAV
According to this waiver request, an integration time of 50 ms should be used.

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

We would prefer if the observations could be carried out as early in the
 semester as possible (i.e. in April or May, if possible), because Eta Car's apastron
 passage is in April 2006 (i.e. the separation of the companion and the wind-wind
 bow shock is largest at this time), as described in the proposal.

Therefore, April or May would be preferable.

Special Execution Requirements

```
None
```

Special Calibration Information

For each science OB, we offer two calibrator OBs:

For SCI_EtaCar_1, the preferred calibrator OB is CAL_SAO237916_1.
For SCI_EtaCar_2, the prefereed calibrator OB is CAL_HD107446_1.

Alternativelty, for SCI_EtaCar_1, we offer the calibrator OB CAL_HD107446_2, and
 for SCI_EtaCar_2, we offer CAL_SAO237916_2.

ToO Information

```
None
```

ToO Activators List

```
None
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
None
```

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
```

Did you indicate for each science star OB the corresponding calibrator star OB (and vice versa) in the 'Instrument Comments' field ?

If you use calibrator stars which are not in the CalVin database, did you specify their characteristics in the README file and in the OBs ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:13 2009
If you have comments, please contact usd-help@eso.org