README web version of /home/usg/OPS/MTS/readme_xml/readme_77057000

Principal Investigator Email Address

```
boekel@mpia.de
```

Estimated Total Execution Time (hours, including overheads)

```
1
```

General Description

This proposal adresses the nature of the low mass companion to the intermediate
 mass
pre-main sequence star HD 100453. It was discovered in a NACO K-band image taken
 in
2003. Based on it's K-band flux and some assumptions, a very rough mass estimate
 of 
0.3 Msun could be made. We now seek to characterize the companion as follows:

1. by measuring it's brightness at J, H, K, L' and M' in order to adequately sample
 the SED
2. by taking an H-band spectrum to measure the strengths of lines of OH, Mg and
 CO, allowing
   determination of the effective temperature by means of the NIR spectral classification
   scheme by Meyer et al. 1998.

These data will allow a much more robust determination of the companion's parameters,
and they will also reveal whether the close companion itself has a circumstellar
 disk
(by means of L and M excess).

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

None other than identified in phase 1 (seeing <=0.8 arcsec)

Time-Critical Aspects

```
None
```

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 ?

```
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?

```
N/A
```

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

```
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 ?

```
N/A
```

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

```
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 15:40:13 2009
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