README web version of /home/usg/OPS/MTS/readme_xml/readme_84066801

Principal Investigator Email Address

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

Estimated Total Execution Time (hours, including overheads)

```
4.5
```

General Description

The aim of this program is to obtain high-resolution, high-SNR spectra
 of the Brackett-Gamma 2.1661 micron line emission of 3 Herbig Ae/Be stars in order
 to measure small-scale photocenter displacements using the spectro-astrometry technique.

In order to properly center the Brackett-Gamma line, we selected the free wavelength
 setting 2165 nm (order number 26).
Since we use a narrow slit of width 0.2", please center the star very accurately
 onto the slit in order to feed sufficient flux into the spectrograph.
To correct the spectra for telluric features, we have selected standard stars of
 late-F/early-G spectral type, which should not show intrinsic hydrogen lines.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
none.
```

Time-Critical Aspects

```
none.
```

Special Execution Requirements

```
none.
```

Special Calibration Information

---(Empty)---

ToO Information

---(Empty)---

ToO Activators List

```
none.
```

Do the README file and the instrument comments of the telluric stars OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral type and allowed spectral range?

Do any OBs include wavelength or flatfield calibrations?

If you are observing Moving Targets, have you attached suitable ephemeris files to your OBs?

```
N/A
```

If the slit viewer guide star is different from the target, are the RA and DEC offsets accurate to within 0.05 arcsec and do they take into account the relative proper motion between the two objects?

```
N/A
```

If you have preferences which OBs should be executed first for objects at similar RA, did you make use of the User Priority field in the OBs?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:32 2009
If you have comments, please contact usd-help@eso.org