README web version of /home/usg/OPS/MTS/readme_xml/readme_84110601

Principal Investigator Email Address

• ejehin@ulg.ac.be

Estimated Total Execution Time (hours, including overheads)

• 1.5h

General Description

• This is a ToO program to target the first bright new comet (mv=6.0) that
   will be observed by the Herschel IR space telescope (one target). Three VLT spectrometers
   will be used : UVES on UT2 and CRIRES and FORS2 on UT1. The observations will be
   trigered at the same time for the three instruments to be executed as close as possible
   (the same night is best or within a few days) to the Herschel observations.
  
  This README is for the FORS2 run (B) that was allocated 1.5h.
  
  There are 3 idendical science OBs, using LSS slit of 1.0" and Grism 300V (none).
  The goal of these OBs is to take a few short exposures on the nucleus of the comet
   and one long exposure several arcminutes away.
   
  The exptimes and offsets are indicative, the final informations (exptime, slit PA,
   etc.) will be provided at the time of the trigger.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none, except it is a moving target

Time-Critical Aspects

• FORS2 OBs should be done just before or just after CRIRES OBs are executed
   (comets are variable objects). This should be possible because FORS2 and CRIRES
   are on the same telescope.
  Several OBs are provided as CRIRES observations will be split on several nights
   and we need (if possible) a FORS observation each time we get CRIRES data.
  The strategy will be specified during the trigger.

Special Execution Requirements

• The detailed observing strategy (exptime, PA, offset for the long exposure
   etc.) is depending on the target and will be provided during the ToO trigger.
  
  Please note :
  ------------
  
  - There are 3 identical OBs using LSS 1.0", GRISM 300V(none). Each OB contains 2
   shorts exposures on nucleus and 1 long far from the nucleus (offset of 15 arcmin)
  
  - A 60 arcsec offset is applied along Y to the first exposure to put the false nucleus
   far from the CCD gap
   
  - A fixed position of the slit on the sky will be used (PA will be provided during
   trigger), 
  
  - 3 OBs have been provided to execute them on the same night as the CRIRES observations
   (which will mostly be split on 2 or 3 different nights).
  
  - The coordinates *and* the differential tracking rates have to be updated in the
   OBs before the 1rst execution. 5 min step ephemeris will be provided at the time
   of the trigger. The position angle (PA) will also be given to be updated in the
   acquisition template.

Special Calibration Information

• We need the usual specphot std star with the MOS slit open at the position
   of the 1.0 arcsec LSS slit (no OB provided).

ToO Information

• The ToO target will be a bright new comet (mag 6) that will be observed
   by Herschel IR space telescope.
  The date of observation will be known about one week before the trigger.

ToO Activators List

• ejehin@ulg.ac.be
  manfroid@astro.ulg.ac.be
  hutsemekers@astro.ulg.ac.be

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 ?

• 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?

• N/A

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 ?

• YES

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