README web version of /home/usg/OPS/MTS/readme_xml/readme_81032504

Principal Investigator Email Address

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

Estimated Total Execution Time (hours, including overheads)

```
8
```

General Description

This is a project to probe the circumstellar envelope of highly dust-enshrouded
 OH/IR stars.

Since all targets are faint in V, all of them require off-axis Coude guiding. The
 correspoding
guide stars have all been chosen from ESO's GSC-1 and GSC-2 with V brighter than
 13th mag and
a distance of less than 1 arcsec. All calibrator stars have been chosen from the
 CalVin database.


Special remarks:

1)For the calibrator HD151680 and the science target IRAS 18172-2305, no IR finding
 chars could be retrieved
  (FIMS tools for periods 81, 80, 79, and 74 have been used and resulted in identical
 error messages).

2)No information on the proper motion of the science targets could be found. Therefore,
 the PM was set to zero.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

Off-axis Coude guiding could be a critical issue. For the targets IRAS
 16292 and IRAS 18172, there have already
been successful observation with MIDI and off-axis Coude guiding in a previous period,
 which proves the general
feasibility of the proposed observations at least for these two targets. Thus, for
 these two targets have the
highest user priority.

Time-Critical Aspects

```
None
```

Special Execution Requirements

Off-axis Coude guiding as specified in the OBs.

Special Calibration Information

```
None
```

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 ?

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 ?

```
N/A
```

Did you verify that your coordinates are as accurate as possible (2Mass coordinates recommended) and that they include proper motions if available ?

Did you specify the LST range of the calibrators such that they cover the range from 30 min before the start of the LST range of the science target to 30 min after the end of the LST range of the science target ?

Last creation of page: Tue Oct 6 15:40:24 2009
If you have comments, please contact usd-help@eso.org