README web version of /home/usg/OPS/MTS/readme_xml/readme_79076200

Principal Investigator Email Address

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

Estimated Total Execution Time (hours, including overheads)

```
6
```

General Description

We aim to spatially resolve the circumstellar material around the Herbig
 Be star V921 Sco.  By using AMBER's medium resolution mode, we want to measure the
 visibility not only in the continuum, but also in the Brackett-Gamma emission line
 at 2.166 micron.

Besides the standard calibrator HD141687 (K=4.4; at earlier right ascension than
 the science target), we have prepared OBs for an alternative calibrator at later
 right ascension (HD163197, K=3.9).  The calibrator HD141687 (K=4.4, V=6.6, G5II/III,
 UD-diameter=0.649+/-0.045 mas) is not in the CalVin list, but was selected using
 Aspro.

For the V921Sco OBs, we specify three science templates (3 x AMBER_3Tstd_obs_1row)
 each with the same spectral window (2.12-2.20 micron, containing the BrGamma line).
  This way, we would like to obtain an increased number of recorded interferograms
 in order to allow data selection and to increase the SNR in the derived visibilities
 and phases.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
None.
```

Time-Critical Aspects

```
None.
```

Special Execution Requirements

---(Empty)---

Special Calibration Information

---(Empty)---

ToO Information

---(Empty)---

ToO Activators List

---(Empty)---

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

---(Empty)---

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 ?

Did you check that your chosen calibrator is bright enough for the instrument mode used ?

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 ?

Last creation of page: Tue Oct 6 15:40:20 2009
If you have comments, please contact usd-help@eso.org