README web version of /home/usg/OPS/MTS/readme_xml/readme_82064600

Principal Investigator Email Address

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pakull@astro.u-strasbg.fr
```

Estimated Total Execution Time (hours, including overheads)

```
9.0
```

General Description

This observation aims at studying spectroscopic variations in the optical
 counterpart of the ULX P13 in the galaxy NGC 7793. This can best be studied by observing
 hydrogen and HeII4686 high-excitation lines (coming from the accretion disk of the
 compact object) and absorption lines (coming from the mass donor). The optical counterpart
 is a bright blue object with V~20 mag.
The 9 spectroscopic observations should be carried out randomly. The standard configuration
 will be LSS Grism 600B+12 with no filter and slit width of 1.0\", slit orientation
 North-South (rotator = 0deg). We were also granted 1 hour of photometric observations
 (programme 082.D-0646(B)) of this object. For scientific reasons, it would be better
 if one photometric observation could be carried out directly before or after a spectroscopic
 observation. Nevertheless, it is not a strict constraint as we know that it decreases
 the scheduling possibilities of the VLT.
The finding chart is showing the relatively target for which there is no need to
 use a blind offset.

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

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No critical constraints.
```

Time-Critical Aspects

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No time-critical aspects.
```

Special Execution Requirements

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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 ?

```
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 ?

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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?

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N/A
```

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

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N/A
```

If this is a run that requires coordinated observations with other facilities, did you give proper instructions in the Time-Critical Aspects Section ?

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N/A
```

If you have prepared your finding charts with tools other than FIMS, do they comply with the specifications on the FORS1 Phase 2 web page ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:27 2009
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