README web version of /home/usg/OPS/MTS/readme_xml/readme_77017400

Principal Investigator Email Address

```
chini@astro.rub.de
```

Estimated Total Execution Time (hours, including overheads)

```
7.0
```

General Description

Straight forward mid IR imaging using the 125 mas/pix scale and the SiC
 filter. 
Per OB, 2-3 finding charts show ISAAC and/or 2MASS K band and (if available) TIMMI2
 N band images. 
In the mid IR all our targets should show extended emission, with expected diameters
 of 4-14 arcsec. 

Hence, we have mostly chosen perpendicular chop/nod directions with throw amplitudes
 of 15 arcsec. 
Exception: parallel chop/nod directions with throw amplitudes of 8 arcsec were chosen
 for target SpN3! 
For all OBs using perpendicular chopping/nodding (i.e., except for target SpN3),
 we kindly ask the 
nighttime astronomer to position our science/reference target at pixel (70,200)
 on the detector: 
1.) to minimize the overlap with badpixel areas and 
2.) to keep it entirely on the detector at all chop/nod positions. 

For telescope guiding, a suitable GSC2 star (RA=18:20:24.007, DEC=-16:08:18.490,
 J2000; V=10.91 mag; 
the same for all OBs) was selected using the VISIR GuideCam tool. 
Nevertheless, in each OB we have set the "Get guide star from" flag to CATALOGUE
 to allow 
the TIO to improve our guide star selection based on his/her experience.

In all OBs, acquisition is doing via a blind offset from a nearby reference star
 according to the following instructions:

--------------------------------

Target: SpN 6
RA (J2000) = 18:20:22.381
Dec(J2000) = -16:11:31.31
ISAAC Ks = 14.9 mag

SPN 6 is a star with Ks = 14.9 mag and a flux density in the TIMMI2 N1 band of 340
 mJy.

The source CEN92 should be used as a reference source exhibiting a brightness of
 Ks = 8.9 mag and a flux density of 2.1 Jy in the TIMMI2 N1 band.  It has offsets
 of delta alpha = -11.7" and delta delta = +13.5" following the P2PP convention.

--------------------------------

Target: SpN 4
(nebula associated with star)
RA (J2000) = 18:20:24.50
Dec(J2000) = -16:13:52.9
2MASS Ks

This is a nebula associated with a star having Ks = 11.9 mag.  It might be usable
 as a reference star and has offsets of delta alpha = -3.0" and delta delta = 0.0"
 following the P2PP convention.

Alternatively, the KW object (see finding chart) can be used as a reference source.
  The photometry results in Ks = 7.3 mag and F(10 micron) = 86.5 Jy.  Its offsets
 are delta alpha = -78.6" and delta delta = +23.0" following the P2PP convention.

--------------------------------

Target: SpN 3
(weak star inside nebula)
RA (J2000) = 18:20:23.312
Dec(J2000) = -16:11:57.08
ISAAC Ks = 16.5 (star only)

SpN 3 is a star with Ks = 16.5 mag embedded inside a nebula.  Altogether, their
 flux density in the TIMMI2 N1-band amounts to 1.2 Jy origininating from a low surface
 brightness of 50 mJy per square-arcsecond.

The source UC 1 (c.f. target IRS 5) should be used as reference source.  It has
 offsets of delta alpha = +23.6" and delta delta = +22.2" following the P2PP convention.

--------------------------------

Target: SpN 2
(centred between N and S)
RA (J2000) = 18:20:34.63
Dec(J2000) = -16:06:25.8
2MASS Ks

In the Ks-band, SpN 2 S has 8.9 mag.  It should be used as a reference star and
 it has an offset of delta alpha = -0.5" and delta delta = -2.5"" following the P2PP
 convention.

Alternatively, the star CEN 102 could be used as a reference object.  In the Ks-band,
 CEN 102 has a brightness of 6.2 mag.  It also has 1 Jy in the Spitzer 5.8 micron
 band.  Its offsets are delta alpha = -182.8" and delta delta = -93.0" following
 the P2PP convention.

--------------------------------

Target: IRS 15
RA (J2000) = 18:20:28.652
Dec(J2000) = -16:12:11.86
ISAAC Ks = 10.1 mag

In the N-band, IRS 15 has 10 Jy and should be used for the acquisition.


Alternatively, the source CEN 0 can be used as a reference star when using the Ks-band.
  Its magnitude is Ks = 5.7 mag.  It has an offset of delta alpha = -15.8" and delta
 delta = +10.8" following the P2PP convention.

--------------------------------

Target: IRS 5
(centred between UC 1 and IRS 5)
RA (J2000) = 18:20:24.728
Dec(J2000) = -16:11:37.02
ISAAC Ks

In the N-band, UC 1 has 14.2 Jy and should be used as the reference object. It has
 an offset of delta alpha = +1.4" and delta delta = +2.1" following the P2PP convention.
 

In the K-band, the source IRS 5 is much stronger than UC 1 and has a brightness
 of Ks = 9.2 mag.

--------------------------------

Target: CEN 92
(centred between UC 1 and IRS 5)
RA (J2000) = 18:20:21.634
Dec(J2000) = -16:11:17.80
ISAAC Ks: 8.9 mag

In the N-band, the target is the strongest source in the central region.

--------------------------------

Waiver Requests

Waiver request 077.C-0174A.01.WAV was accepted on 02nd Feb 2006 
to change the pixel scale (from 75 mas/pix to 125 mas/pix) 
with respect to our Phase 1 proposal.

Critical Observing Condition Constraints

```
N/A
```

Time-Critical Aspects

```
N/A
```

Special Execution Requirements

```
N/A
```

Special Calibration Information

```
N/A
```

ToO Information

```
N/A
```

ToO Activators List

```
N/A
```

Is this a Pre-imaging run ?

```
false
```

Pre-imaging Requirements

```
N/A
```

Source(s) of Pre-imaging

---(Empty)---

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 ?

```
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 ?

```
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 the provided finding chart is at a different wavelength than the observations, did you clearly describe in the README file how to identify the target?

Did you specify a guide star brighter than V=12mag within a field of r=5arcmin around the science target?

Last creation of page: Tue Oct 6 15:40:12 2009
If you have comments, please contact usd-help@eso.org