README web version of /home/usg/OPS/MTS/readme_xml/readme_75051500
Principal Investigator Email Address
Estimated Total Execution Time (hours, including overheads)
General Description
This is an imaging and spectroscopic run on Saturn's rings, to observe
both longitudinal variation of emission, and spectrumin the N band.
The are 2 runs in imaging mode. Observations of rings with the Q3 filter need first
to center perfectly the planet on the detector. It extremely important for us to
capture all rings. This is why we rotate the field to align the matrix's diagonale
with the equator of the planet.
So, before any scientific acqusition, the field must contain all A, B and C rings
(cf finding charts)(A ring can touch the edge of the field). (think also to verify
that this is always the case during the run).
On Q3 band, we also want to image the 2 ansa of rings (with an offset in nodding).
The field center must be shift from Saturn's center to point approximately on the
edge of the planet, at the equator.
The third OB is for Low resolution spectroscopy.
The aim is to rotate the slit parallel to the equatorial ligne, and centering along
the West ansa of rings. This is to obtain spectra of all rings simultaneously. Noding
throw must be greater than 15" to point outside the rings in the B position.
Waiver Requests
Critical Observing Condition Constraints
Saturn must me at an airmass lower than 1.5
The centering of the planet and the rotation of the field to contain all rings is
extremely important for us.
For the spectroscopic mode, the slit must be align with the equator plane of Saturn,
and centered on the west ansa of rings.(cf finding charts)
Time-Critical Aspects
Special Execution Requirements
Ideally, both offset images in Q3 filter with the generic chopNod might
contain the planet ( cf finding charts)
For spectroscopy, the position of the slit is very important. The center of the
slit must be placed near the equator limbe of the planet. It's not very important
if there are a few incertainties in positions slit in declinaition (but less than
1.5 - 2 ")
Special Calibration Information
standard calibration, exept for imaging in Q3 band filter.
We need to observ the star HD61338 ( RA= 07 39 28.5925 and DEC=+17 40 28.268) at
the same airmass of Saturn, just after or before Q3 science imaging
(Mv=6.670 , Spectral type = M0III)
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 15:40:07 2009
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