README web version of /home/usg/OPS/MTS/readme_xml/readme_84053400
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
Dear observer,
The target is the central MIR emitting region of starburst galaxy NGC1808. This
region has a size of about 20\"x10\" with its the longest direction aligned along
PA=135degrees approximately. This region contains one bright MIR central source
(the probable AGN) of about 1Jy at 13microns (TIMMI2 filter) and several compact
MIR sources (the embedded clusters) of about 100-200mJy in this same filter.
The image reproduced in the finding charts is the TIMMI2 12.9micros image.
The program is divided in two parts:
The first is the imaging of the whole region through 5 different filters (OBs called
NGC1808_img_*). This is also the priority number one.
Given the size of the MIR emitting region and the recommendations about the choppping
throw values in the user manual, we chose a value of 15arcsec. This is enough to
avoid self chopping (the source size along the chopping direction PA=0. is about
10arcsec) and the user manual does not recommend to use values larger than 15arcsec.
We are aware that we will only be able to use the central beam, and that the other
two will be partially lost. The central point source (the ~1Jy AGN) will be used
for presetting, and shall be positioned at the centre of the detector.
The second part is the full N-band spectroscopy along two slit positions:
- First (the OBs called N1808_spec_pos2_*), the slit is positioned in order to
record the spectra of two off-nucleus sources (the MIR knots, see FC). Blind offset
using the central AGN as a reference will be performed. This is priority number
two.
- Second (the OBs called N1808_spec_pos1_*) the slit is positioned over the central
source + one off-nucleus emission knot (see FC).
Since the central source is used for reference, in that case no blind offset has
to be performed. This is priority number three.
For each slit position, we need to obtain the full N-band spectrum (four settings
8.5, 9.8, 11.4, 12.4). In order to achieve our scientific goal, we need the full
specgral coverage, and hence the priority is to complete the observations on one
slit position before starting the other one.
good luck with everything and other best wishes
Emmanuel Galliano
Please contact me at manolight76@gmail.com for any doubt or problem.
Waiver Requests
Critical Observing Condition Constraints
Time-Critical Aspects
Special Execution Requirements
Special Calibration Information
ToO Information
ToO Activators List
Is this a Pre-imaging run ?
Pre-imaging Requirements
Source(s) of Pre-imaging
Pre-imaging sources not listed above
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 ?
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 ?
Have you included OBs for any calibrations that you need but which are
not part of the Calibration Plan ?
If you are observing Moving Targets, have you attached suitable ephemeris
files to your OBs?
If you have preferences which OBs should be executed first, did you make
use of the User Priority field in the OBs ?
If this is a run that requires coordinated observations with other facilities,
did you give proper instructions in the Time-Critical Aspects Section ?
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 15:40:32 2009
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