README web version of /home/usg/OPS/MTS/readme_xml/readme_77006103

Principal Investigator Email Address

```
tijl.verhoelst@ster.kuleuven.be
```

Estimated Total Execution Time (hours, including overheads)

```
6 hours
```

General Description

MIDI observations of OH/IR stars have 2 complications:

1) no visual counterparts => coude guiding on off-axis source and blind acquisition
 (finding charts are provided in optical, also showing the guide star, and in K).
 The guide stars may be too faint; Please switch to Guide star: NONE mode for both
 science target and associated calibrator if the guide stars I found are too faint

2) deep silicate absorption in all objects but WX Psc => only significant flux
 at 8 and 13 micron, but not in between.


strategy:  some rough earth-rotation-synthesis. LST constraints are entered such
 that different projected baselines are obtained, but the observer may deviate from
 these intervals, as long as the different projected lengths are guaranteed (different
 angles will be obtained with a perpendicular UT baseline)

Thanks, I know these are not trivial observations!

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

Good seeing (<= 0.8 arcsec) if no coude guiding is possible

Time-Critical Aspects

none, except for the different projected baseline lengths which are translated
 into LST constraints

Special Execution Requirements

```
none
```

Special Calibration Information

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none
```

ToO Information

```
NA
```

ToO Activators List

```
NA
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
NA
```

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 ?

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 15:40:12 2009
If you have comments, please contact usd-help@eso.org