README web version of /home/usg/OPS/MTS/readme_xml/readme_81028200

Principal Investigator Email Address

```
smieske@eso.org
```

Estimated Total Execution Time (hours, including overheads)

```
17.5 hours
```

General Description

This program aims at measuring the CO absorption feature at 2.3 mu for
 two ultra-compact dwarf galaxies
in the Virgo cluster, close to the central galaxy M87. There are 12 idential OBs
 called UCDs_M87-*. 

The two UCDs are separated by only 40", such that the slit should cover both sources
 at the same time, with a rotation angle of -40.4 degrees. See attached finding chart,
 which is in an optical band. No sufficiently deep IR imaging was available for the
 finding chart. The two UCDs are expected to have K-band magnitudes 17.5 to 18, which
 should be enough for proper slit-centering. 

In addition to the 12 OBs for the UCDs, we have submitted four OBs for measuring
 the same feature on four globular clusters in Centaurus A, as comparison sources.
 The OBs are called GC_* 
The GCs should be 1-2 mag brighter in K than the UCDs, so no problem with slit centering.
 It would be ideal if those OBs could be observed in nights when also the UCD-OBs
 are observed.

Finally, we have submitted two OBs for further reference sources, specifically M87
 and a foreground star Gliese 880. They have loose observing constraints and lower
 priorities.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

```
none
```

Time-Critical Aspects

```
none
```

Special Execution Requirements

Ideally, the GC_* OBs are executed in a night when also UCD_* OBs are
 executed.

Special Calibration Information

Special calibration OBs are the four GC_* OBs. They are essential as comparison
 sources for the CO measurement. Further special calibration OBs are M87 and Gliese
 880. Those have lower priorities than the GC_* OBs. Gliese 880 should be observed
 at bad seeing (>1.2") to avoid saturation of the spectrum.

ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

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Source(s) of Pre-imaging

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Pre-imaging sources not listed above

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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 ?

Have you included OBs for any calibrations that you need but which are not part of the Calibration Plan ?

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
```

If you submitted OBs for standard stars, did you use the provided StandardStar templates ?

```
N/A
```

If you are using a specific offset pattern or position angle, did you check carefully the definition in the manual ?

If you are doing spectroscopy, did you draw the slit on the Finding Charts ?

Did you enter the magnitude of the brightest star in the field-of-view in the 'Instrument Comments' field of each OB ?

```
N/A
```

If you use the MoveToPixel acquisition, have you given clear instructions on the FC and in the OB comment section as to how the field should be centered ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:23 2009
If you have comments, please contact usd-help@eso.org