README web version of /home/usg/OPS/MTS/readme_xml/readme_80088101

Principal Investigator Email Address

• cdumas@eso.org

Estimated Total Execution Time (hours, including overheads)

• 4:01

General Description

• Simple high-res UVES spectroscopy (346B setting and 1" slit) of the surroundings
   of the largest asteroid Ceres (moving target) to attempt detecting its escaping
   atmosphere (in the form of weak OH emissions at 310nm). The slit is oriented perpendicular
   to the direction of the rotation axis of the asteroid (the PA is already set in
   the OB). After centering the slit on the object, the slit will be offsetted to its
   final position outside Ceres, but in its immediate vicinity. 
  
  Please mind the user constraints priorites: If the seeing constraint is not respected,
   Ceres, which is very bright, will spill some light in the slit and saturate the
   CCD.
  
  The Northern and Southern OBs can be executed independently from each other, although
   as close in time as possible is *preferable*. 
  
  To summarize, the acquisition is done as following: 
  (1) the slit is ~ centered on the asteroid
  (2) the template makes an offet of +1" (resp. -1") to position the slit **outside**
   Ceres, but near its Northern (resp. Southern) poles.
  
  We expose for ~ 50min per OB (21 OB near South pole, 2 OBs near North pole).
  
  *** Autoguider should be ON and Ceres used as "offset star" so the slit does not
   move wrt Ceres ***

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• PHO, seeing better than 0.8", low airmass (<1.6). These constraints
   are *very* important to respect.

Time-Critical Aspects

• Should be executed ASAP, before April 01, 2009. See ephemeris file attached.

Special Execution Requirements

• Moving targets - please update both coordinates and Diff RA/DEC in the
   OB using the provided ephemeris.
  *** Autoguider should be ON and Ceres used as "offset star" so the slit does not
   move wrt Ceres ***

Special Calibration Information

• Special daytime calibration : 
  Please, obtain 20 daytime flatfield frames (in both blue and deuterium lamps) instead
   of the default 5 frames, this is order to get the best flatfielding as possible
   in the blue region of the spectrum

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 ?

• YES

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 ?

• N/A

If you submitted OBs for standard stars, did you specify the magnitude
 and spectral type of all standard stars in the OBs ?

• YES

Have you specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• YES

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• YES

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

• YES

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

• YES

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 need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A