README web version of /home/usg/OPS/MTS/readme_xml/readme_82002900

Principal Investigator Email Address

• b.borguet@ulg.ac.be

Estimated Total Execution Time (hours, including overheads)

• 24.0

General Description

• This is a simple run in order to measure linear polarimetry of some quasars
   in the V-band (i.e. with the V-high filter). The exposure time computed with the
   ESO ETC are such that there should be no saturation even if the seeing = 1.0 arcsec.
   If the seeing is better than 1.0 arcsec, please reduce the exposure time for the
   brightest objects in order to not saturate the images:
  -if the seeing is around 0.8", reduce the exposure time given in the OB of targets
   with a magnitude Mv < 20 by a factor 0.7 (the faintest objects (Mv>20) will
   not saturate, so no correction have to be applied).
  -if the seeing is around 0.6", reduce the exposure time given in the OB of targets
   with magnitude Mv < 20 by a factor 0.4 (once again the faintest objects (mag>20)
   will not saturate)
  We give in each OB the magnitude Mv of the target in the 'User comment' line.

Waiver Requests

• A Phase 2 waiver request was submitted for this run on the 8 of July 2008
   and was approved on the 16 of July 2008.
  The Phase 2 waiver request was asked in order to override the 1 hour execution time
   limit for OBs in the service mode with the ESO FORS1 instrument during P82. Indeed
   5 of our 30 OBs ovveride the one hour limit but always with a total OB execution
   time lying between 1.0 to 1.5 hour. Since the seeing is not really critical for
   polarimetry (our constraint on the seeing is < 1.2" for this run) we think it
   is preferable to be able to make longer OBs for those 5 targets than increasing
   the overheads by splitting these OBs into two.

Critical Observing Condition Constraints

• No critical observing condition constraints associated with this run

Time-Critical Aspects

• No time-critical aspects associated with this run

Special Execution Requirements

• We give a "User Priority" (1,2 or 3) in each OBs in order to execute some
   OBs in priority.
  Objects with user priority 1 are part of another program ranked in the B class (Prog082.B-0029(B));
   obtaining polarimetry for those objects is mandatory in order to complete the scientific
   goals of this second program. In addition to these objects, there is another object
   with a user 1 priority : COMBO_52963 (=Target name). Obtaining polarimetry for this
   object would be much appreciated since it is one of our best candidates to fulfill
   one of the principal goal of the current program (obtaining linear polarimetry for
   Type1 quasars with a resolved HST image). Please pay attention that we divided the
   total exposure time requested for this object into two OBs (COMBO_52963-1 and COMBO_52963-2)
   in order to allow a better schedulability (the overheads may be decreased if you
   observe the two OBs consecutively).
  
  We do not need more calibrations than those indicated in the FORS1 calibration plan
   (i.e. observation of a polarized standard at the end of the night and imaging sky
   flat without polarizers).

Special Calibration Information

• ---(Empty)---

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 ?

• 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 ?

• YES

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

• N/A

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?

• N/A

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