README web version of /home/usg/OPS/MTS/readme_xml/readme_78507000

Principal Investigator Email Address

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alexis@astro.su.se
```

Estimated Total Execution Time (hours, including overheads)

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2h
```

General Description

These OBs define imaging and spectroscopy of an ultra-low-mass companion
 candidate (ULMcc) to a binary system. Imaging will be done in Ks, H, and J in a
 single OB, and H-band spectroscopy in another. The ULMcc will be invisible during
 acquisition, but since we have good astrometry from NACO imaging of the system in
 2006, the ULMcc should be in the slit if only the detector is oriented as specified
 and the slit centered over the _primary_ (the brightest Eastern star of the tight
 inner 0.2" binary). See the zoomed-in finder chart for the spectroscopic OB.

We have prepared the OBs to not saturate the primary under expected conditions (Strehl
 = 50%). Should the conditions improve to the degree that the primary starts to saturate,
 we would prefer if the exposure times were lowered accordingly. If this is not possible
 (e.g. the shortest time 0.3454s is already used), then just continue with the exposures,
 as our primary interest is the ULMcc and not the primary star of the system (which
 would only serve as a valuable, but not critical, calibrator).

Brightest star in the field (for both OBs) is the primary at V=12.4 and K=8.2.

Waiver Requests

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No Waiver Request was submitted
```

Critical Observing Condition Constraints

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No critical conditions.
```

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 ?

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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 PSF reference star OBs, do the names of those OBs begin with PSF_ ?

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N/A
```

If there are Finding Charts attached to your OBs, is the field-of-view of at least one of these charts 2' x 2' (with clearly labelled field orientation) ?

Have you clearly marked and labelled your wavefront reference objects R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding Charts ?

Have you specified the magnitude of the brightest object in the field-of-view for each OB ?

Are there objects in any of your fields (including standard stars) which are brighter than the limits specified in the User Manual and on NACO web Pages ?

If the previous answer is yes, have you given a list of OBs and a justification for the brightness limit violation in the general description field ?

```
N/A
```

Last creation of page: Tue Oct 6 15:40:17 2009
If you have comments, please contact usd-help@eso.org