README web version of /home/usg/OPS/MTS/readme_xml/readme_75035000

Principal Investigator Email Address

• frederic.courbin@epfl.ch

Estimated Total Execution Time (hours, including overheads)

• 14.9h

General Description

• !!! Please execute imaging OB (number 213399) before taking the next epoch,
   this is necessary to us to check the masks alignements !!!
  
  
  This is the continuation of our spectrophotometric monitoring of the Einstein cross,
   with the VLT and FORS1. The goal is to take spectra of the four components of the
   lensed quasar (seeing < 1"), and to deconvolve the data using the spectra of
   PSF stars in order to remove the spectrum of the lensing galaxy and study the spectra
   of the quasar images alone.
  
  We have 10 epochs, with two masks per epoch (the two masks should be taken on the
   same day or with 1 day interval max). 
  
  The epochs are separated by about 15 days, sometimes 1 month when no service runs
   are planned with FORS1. But since service runs scheduling is not 100% reliable,
   try to stick to the 15 days +- 5 days interval between two epochs as much as possible).
  
  http://obswww.unige.ch/~eigenbro/Q2237.html
  
  gives the *ideal* (but not imposed !) observing dates given the moon illumination
   and moon distance. 
  
  WE CONSTANTLY UPDATE OUR PAGE, SO THAT IT IS EASY FOR THE ESO STAFF TO SEE WHEN
   
  WAS THE LAST OBSERVING DATE. THE GOAL IS ONE OBSERVING POINT EVERY 15 DAYS +- 5
   DAYS.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• The constraint set only reflects the *average* acceptable weather conditions.
  The ideal situation would be to have most data taken with seeing
  STRICTLY BELOW 1 arcsec (0.9 is fine), with some exceptions with seeing
  of 1.00 1.05, but no more.
  
  Observations with conditions slightly worse than those specified are still acceptable
   in exceptional cases --> we prefere getting good temporal sampling and good temporal
   coverage in conditions slightly off the ideal, rather than always excellent weather
   conditions but sparce sampling. This should however be applied *only* if one or
   several
  epochs have been missed due, e.g. to very bad weather.

Time-Critical Aspects

• This is a monitoring program, with the goal of taking 1 observing point
   per period of 15 days +- 5 days.
  
  See http://obswww.unige.ch/~eigenbro/Q2237.html for the best dates.
  
  Given the random changes in the scheduling of service mode runs, we can unfortunately
  not provide more precise observing dates. It is up to the night astronomer to decide
  on when exactly to run an observing epoch (two masks), but we will track daily how
  operations go and send reminders regularly.

Special Execution Requirements

• None

Special Calibration Information

• None

ToO Information

• Not a ToO.

ToO Activators List

• Not ToO

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• Not a Preimaging run.

Source(s) of Pre-imaging

• FORS1 after 03/03

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 ?

• 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 ?

• YES