README web version of /home/usg/OPS/MTS/readme_xml/readme_83024000

Principal Investigator Email Address

```
jgroh@mpifr-bonn.mpg.de
```

Estimated Total Execution Time (hours, including overheads)

```
2:58:05
```

General Description

The goal of the program is to obtain *spatially-resolved* spectra of Eta
 Carinae and its inner nebula after the
periastron passage of the companion in January and early February 2009. For each
 reference wavelength the slit should be centered on the
central star, with a position angle of 325. Note that this PA is slightly misaligned
 (8 degrees) relative to the major axis of the
nebula (see finding chart 1). Finding chart 1 shows how the star+nebula should look
 in the CRIRES acqisition image (image is saturated
in this case). After the slit in centered on the central star, 1s exposures repeated
 NDIT times should be made in order to not saturate
the spectrum of the central star. A large number of NDIT (17-25 depending on the
 reference wavelength) should be used in order to build
up the desired high S/N. After that, longer exposures of 41-55s (depending on the
 reference wavelength) should be made at specific
offset positions from the central star in order to obtain the spectrum of the nebula.
 The offset positions for the long exposures should
be, in DETECTOR coordinates:
-grating angle 26, both ref. wave. 2150.0 and 2156.5: (X,Y)=(-0.2,0), (X,Y)=(-0.2,0),
 (X,Y)=(0.6,0), and (X,Y)=(0.2,0).
-grating angle 27, both ref. wave. 2070.4 and 2076.6: (X,Y)=(-0.2,0), (X,Y)=(-0.2,0),
 (X,Y)=(0.6,0), (X,Y)=(0.2,0) and (X,Y)=(20,0).
-grating angle 52, both ref. wave. 1087.3 and 1090.4: (X,Y)=(0.2,0), (X,Y)=(0.2,0),
 (X,Y)=(0.4,0) , (X,Y)=(-1.0,0), (X,Y)=(-0.2,0), (X,Y)=(-0.4,0), and (X,Y)=(20,0).

Note that the above offsets are cumulative from the previous one (i.e. we are assuming
 that the telescope is not returning to 0,0 after each offset position). The absolute
 offsets *relative to the central star* in detector coordinates (shown in Finding
 chart 2 for each OB), corresponding to the cummulative offsets given above, are:
-grating angle 26, both ref. wave. 2150.0 and 2156.5: (X,Y)=(-0.2,0), (X,Y)=(-0.4,0),
 (X,Y)=(0.2,0), and (X,Y)=(0.4,0). 
-grating angle 27, both ref. wave. 2070.4 and 2076.6: (X,Y)=(-0.2,0), (X,Y)=(-0.4,0),
 (X,Y)=(0.2,0), (X,Y)=(0.4,0), and (X,Y)=(20.4,0).
-grating angle 52, both ref. wave. 1087.3 and 1090.4: (X,Y)=(0.2,0), (X,Y)=(0.4,0),
 (X,Y)=(0.8,0) , (X,Y)=(-0.2,0), (X,Y)=(-0.4,0), (X,Y)=(-0.8,0), and (X,Y)=(19.2,0).

Waiver Requests

```
No Waiver Request was submitted
```

Critical Observing Condition Constraints

There are no critical observing constraints other than those specified
 in each OB.

Time-Critical Aspects

```
No time critical aspects.
```

Special Execution Requirements

Special attention should be made in order to observe the correct spatial
 offsets (see finding chart 2 for each science OB).

Special Calibration Information

Telluric OB should be observed after each science OB.

ToO Information

```
None.
```

ToO Activators List

```
None.
```

Do the README file and the instrument comments of the telluric stars OBs include the required S/N/pixel of the spectrum of the telluric star, its spectral type and allowed spectral range?

Do any OBs include wavelength or flatfield calibrations?

If you are observing Moving Targets, have you attached suitable ephemeris files to your OBs?

```
N/A
```

If the slit viewer guide star is different from the target, are the RA and DEC offsets accurate to within 0.05 arcsec and do they take into account the relative proper motion between the two objects?

```
N/A
```

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

Last creation of page: Tue Oct 6 15:40:29 2009
If you have comments, please contact usd-help@eso.org