README web version of /home/usg/OPS/MTS/readme_xml/readme_76505704

Principal Investigator Email Address

• dotto@mporzio.astro.it

Estimated Total Execution Time (hours, including overheads)

• 1.5h

General Description

• This observing run is devoted (1.5h) to the polarimetric investigation
   of the NEO 2004 VD17
  We need high signal to noise exposures in order to reach the desired precision in
   the evaluation of the object polarization. Polarization is evaluated repeating 3
   times the exposure at 4 rotator angle position (0, 22.5, 45, 67.5 deg). As the target
   is a fast moving object,
  we divided the full scientific observation into 2 separate obx: a first one (mov_2004vd17_dates_A,
   shortly run_A) to acquire images at two rotator angles (0 and 45 deg), and a second
   one (mov_2004vd17_dates_B [run_B]) to acquire images at rotator angles = 22.5 and
   67.5 degrees.
  This splitting in 2 obx of the total observing time is needed to check the position
   of the target ( a fast moving object) after the first part of the observations and
   eventually re-center it, IN THE SAME POSITION OF THE CCD, inside the mask.
  WE put the ephemeris selected from one of the nigth of the short observing run proposed,
   of course they (and the differential tracking, first column of the sky motion is
   the RA motion, second column the DEc. motion) must be changed.
  We attach a finder chart as an example, as the obj moves fast. On time asteroid
   finder charts could be retrived on line at the web: http://asteroid.lowell.edu/cgi-bin/koehn/astfinder
   (insert the observatory (Paranal, N. 309) the date of obs. and the name of the obj
   : 2004 VD17), or finder charts with the sky star bacground culd be retrive with
   the ESO DSS.

Waiver Requests

• No Waiver Request was submitted; the total obsrving run (1h 19m for a
   consecutive observation at 4 rotator angle pos), has been splitted in two part to
   check the object position and the correct differential tracking of the telecope.

Critical Observing Condition Constraints

• The target is visible at the beginning of the nigth. It is preferable
   to observe it at airmass not higher then 1.7. We need clear sky.

Time-Critical Aspects

• These observations (run E) must be run between 28-31 may 06 (this run,
   together with run F, has been moved after run I as the observations initially proposed
   for april were not performed due to bad weather conditions/visitor mode) 
  in order to evaluate the polarization of 2004 VD17 in the phase angle range 73-80
   degrees. In our project we ask for 7 distinct observations in polarimetric mode
   to cover 7 different targets phase angle aspects. This observations must be repeated
   with a preferential time step of 3-5 days (excluded the periods of full moon or
   when the target is too close to the moon).
  PLEASE NOTE THAT IN CASE OF PROBLEMS (WEATHER or other things), if
  these observations cannot be performed in the indicated dates, they
  can be shifted in the following days (4-7 june, as during 1-3 june it is too close
   to the moon, during the run F period, getting
  so in this run two observations (the delay run_E one and the foreseen run_F) , with
   a MINIMUM time separation between the 2 observations of about 24 hours

Special Execution Requirements

• Run_B (mov_2004vd17_dates_B, rotator position angle=22.5 and 67.5 deg)
   must be performed immediately after run_A (mov_2004vd17_dates_A, rotator position
   angle= 0 and 45 deg) ; as the pointing is the same, please do not preset the telescope.

Special Calibration Information

• WE need a not polarized std star as calibrator of the instrumental poalrization,
   to be observed nearby the asteroid investigation. 
  We propose here star WD1344+106 (please verify according to the nigth condition
   the exp time in order to have a high S/N ratio but not saturation), but any star
   taken from the ESO list of not pol stars ("closest" as possible to the target) is
   good for our purpose

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• ---(Empty)---

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 ?

• N/A

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 ?

• YES

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 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?

• 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 have prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS1 Phase 2 web page ?

• YES