README web version of /home/usg/OPS/MTS/readme_xml/readme_77061502

Principal Investigator Email Address

• frederic.courbin@epfl.ch

Estimated Total Execution Time (hours, including overheads)

• 19.5

General Description

• This program is the continuation of Program 177.B-0615(B) which is a long-term
   spectrophotometric monitoring of the "Einstein Cross", in view of a study of chromatic
   microlensing.  Accurate mask alignment both of the PSF stars AND the target is *crucial*.
    We have planned 13 epochs, with two masks per epoch. The epochs are separated by
   about 15 days (sometimes 1 months when no service runs are planned with FORS1).
   If technical time becomes available, please don't hesitate to run OBs that were
   previously not run, e.g., due to bad weather. The following tentative schedule 
   http://obswww.unige.ch/~eigenbro/Q2237.html  gives the ideal observing dates, given
   the moon illumination and moon distance. We have tried to put our prefered dates
   during planned service mode runs, as scheduled on the ESO pages. Please tell us
   if this schedule is modified. We will update our page regularly. 
  A key issue is to keep as close as possible to the 15 days sampling and to execute
   the "mask1" and "mask2" OBs of the same epoch on the same night or on two consecutive
   nights max. It is also very important to continue the observations as long as possible
   in the period, even at high airmass.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Observations with conditions slightly worse than those specified are still
   acceptable in exceptional cases --> we prefer 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.
    In practice we can accept seeing up to 0.9 arcsec. 
  However, note that this is the kind of program that will not be hurt by excellent
   seeing, if possible at all.

Time-Critical Aspects

• This is a monitoring program, with the goal of taking 1 observing point
   per period of 15 days. See :  http://obswww.unige.ch/~eigenbro/Q2237.html 
  for optimal time observation dates (2 masks per epoch).

Special Execution Requirements

• ---(Empty)---

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

• 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 ?

• N/A