README web version of /home/usg/OPS/MTS/readme_xml/readme_78050901

Principal Investigator Email Address

• boehnhardt@mps.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 13h33m

General Description

• Science: Imaging polarimetry IPOL and filter photometry IMG of comet 9P/Tempel
   1 to measure micro-roughness and grain albedo of the nuclear surface and to test
   geometric albeo - polarimetry correlation for comets.
  
  Requirements: IPOL and IMG OBs have to be measured quasi-simultaneously, i.e. IPOL
   OB first immediately followed by IMG OB, to be repeated at 8 epochs (which set in
   the OB time constraints field) corresponding to different phase angles of the comet.
   hence, one observing epoch consists of one IPOL and one IMG OB. The time window
   for the observing epoch is part of the OB names and is set in the time constraints
   field of the OBs.
  
  Dummy OBs: these OBs are meant to re-image fields taken with THN sky, again under
   CLR conditions (upon request by PI via USD).
  
  
  IMPORTANT NOTES
  ===============
  
  - For each observing epoch execute first IPOL OB followed immediately by corresponding
   IMG OB!
  
  - In case sky changes from CLR to THN during IPOL+IMG OB execution, please continue
   to end of OB pair. It was agreed with the USD responsible for the program, that
   the same field will be re-imaged by an IMG dummy OB a-posteriori. The PI will provide
   the respective pointing information to USD in-time and USD will schedule the respective
   OB for execution.
  
  - Minimum time difference between pairs of IPOL+IMG OBs must be 4 nights!
  
  - Do not execute OBs of this program for very good seeing conditions (<0.45arcsec)
   since object may saturate!
  
  - Blind acquisition, i.e. object identification is not necessary, though easily
   possible. Please check telescope pointing through DSS image!
  
  - If possible, do not interrupt or time-split OB execution!
  
  
  Ephemeris file: The ephemeris provides in 10min time steps for the daily visiblity
   window of the comet at Paranal
  * RADEC positions (hh mm ss.ss, sdd mm ss.s)
  * RADEC velocities (arcsec/s)
  * Airmass
  * Vis. Brightness (mag)
  * distance comet-moon TOM (deg)
  * moon phase (%)
  
  
  Cook instructions for OB execution (for IPOL and IMG OBs, not applicable for IMG
   dummy OBs):
  ============================================================================================
  - perform only ONE OB per night, minimum time difference to last OB = 4 nights
  - select OB for execution
  - check time constraints and requirement for environmental conditions (CLR, seeing
   > 	0.45arcsec, moon distance)
  - in OB enter RA and DEC from target ephemeris (fields RA and DEC) that are closest
   in time to the expected start time of the OB
  - in OB enter differential velocity in RA and DEC (fields VEL_RA and VEL_DEC) from
   target ephemeris that are closest in time to the expected start time of the OB
  - perform preset and take acquisition image
  - check field by DSS
  - for IPOL OB: in acquisition image click on FORS field center to acknowledge target
   position (object is within few arcsec)
  - execute science templates of OB

Waiver Requests

• Waiver to use IPOL and IMG templates in same OB: granted, but impossible
   to check-in, hence separate IPOL and IMG OBs to be executed one immediately after
   the other.
  
  Waiver to extend OB execution time to 2h10m: granted

Critical Observing Condition Constraints

• Seeing should be WORSE than 0.45" to avoid object saturation!

Time-Critical Aspects

• Critical observing windows are defined in Time Intervals field of each
   OB.

Special Execution Requirements

• IPOL+IMG OB of same epoch (see OB names) must be executed one immediately
   after the other!
  
  Continue execution of IPOL+IMG OB pair in case sky conditions change from CLR to
   THN! The respective field will be re-imaged a posteriori through activation of one
   of the IMG dummy OBs by the PI via USD.
  
  Minimum time difference between pairs of IPOL+IMG OBs must be 4 nights!
  
  If possible, do not interrupt or time-split OB execution!

Special Calibration Information

• According to FORS1 calibration plan: one IPOL polarized standard star
   per observed OB.
  According to FORS1 calibration plan: one IPOL non-polarized star per year (would
   be great to get it measured not to long in time away from this program).

ToO Information

• Not a ToO program.

ToO Activators List

• Not applicable.

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• Not aplicable.

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 ?

• 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?

• YES

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

• N/A

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 ?

• N/A