README web version of /home/usg/OPS/MTS/readme_xml/readme_77059111

Principal Investigator Email Address

```
jens@astro.ku.dk
```

Estimated Total Execution Time (hours, including overheads)

```
17h
```

General Description

Pre-imaging OBs of selected GRB fields centered on the Swift XRT (Butler2006)
 positions. 
Some fields have been offset in order to avoid objects brighter than K~11. The OB
 names 
of these fields contain the word "offset".

Some of our targets pass closer than 8 degrees from Zenith and we have noted this
 in the 
corresponding OBs "User Comments" field. These OBs should not be observed at hour
 angles 
less than +/- 30min (ie. the 1h OBs should normally be started at least 1.5h before
 
meridian passage, or at least 0.5h after meridian passage). The targets in question
 are:

PRE GRB051001 Ks 3600s
PRE GRB051117Boffset Ks 1300s
PRE GRB060607A Ks 3600s
PRE GRB061021 Ks 3600s

Waiver Requests

In two of our OBs :

PRE GRB051117B Ks 1300s
PRE GRB060218offset Ks 1300s

we requested less than 1 min between telescope offsets (40sec) and 
accordingly submitted a waiver request on Jan 24, 2007. 
This request was accepted on Feb 7, 2007.

The waiver ID is : 177.A-0591L.01.WAV

Critical Observing Condition Constraints

```
None
```

Time-Critical Aspects

```
None
```

Special Execution Requirements

Please note that four of our targets are located such that they pass near
 Zenith. Due to
the faster movement of the rotater near Zenith a poorer sky estimation results.
 
These OBs should consequently NOT be observed at Hour Angles less than +- 0.5h,
 This means
they should either be started at least 1.5h before meridian passage, or 0.5h after
 meridian
passage. See General description and OB comments for more info.

Special Calibration Information

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ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

```
true
```

Pre-imaging Requirements

```
These OBs are PRE-IMAGING.
```

Source(s) of Pre-imaging

```
ISAAC
```

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 ?

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
```

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 ?

```
N/A
```

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

```
N/A
```

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

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 15:40:13 2009
If you have comments, please contact usd-help@eso.org