README web version of /home/usg/OPS/MTS/readme_xml/readme_77068400

Principal Investigator Email Address

• romanow@astro-udec.cl

Estimated Total Execution Time (hours, including overheads)

• 1.2

General Description

• This programme consists of FORS2 pre-imaging of 8 fields around the galaxy
   NGC 4374, followed by MXU, with the aim of measuring radial velocities of globular
   clusters.  Rapid acquisition of the pre-images is requested, to permit adequate
   time to prepare MXU OBs.
  
  Note that rotator is -90 deg (to mimic parallactic angle and minimise refraction).
    
  Field centres in finding chart aren't exact (see OBs).

Waiver Requests

• Request granted to shift 0.2 hours from (B) run to (A) run, hence 1.2
   hrs for (A) run.

Critical Observing Condition Constraints

• Constraints are as given in OBs.  What's critical is to have pre-images
   where we can see our spectroscopic candidates down to R=22.3.
  
  I figure the target has Airmass < 1.3 for up to 2 hrs at a time, but if this
   becomes a problem to schedule, the constraint may be relaxed slightly.  Airmass
   should be low to minimise refraction differences between the pre-imaging and the
   MXU followup.
  
  If observations are taken during really good seeing, exposure times might have to
   be
  shortened to prevent too many saturated targets.
  
  Note the combined exposure times and observing constraints are conservative to allow
   for the worst-case scenario.  But some of the constraints could be relaxed if others
   are better:  in particular, if seeing or transparency is good, Moon illumination
   could be relaxed.  This is an important point, since we would like to receive the
   pre-images by mid-February to have a good amount of time to prepare the masks. 
   So if we're coming up to 5 Feb and some pre-images haven't been taken yet, we could
   consider relaxing the constraints to extend the observing window for a few more
   days.

Time-Critical Aspects

• It's very important that pre-imaging happen well before April, as the
   target fields are already at maximum visibility when Period 77 begins. Target should
   already be visible at maximum elevation towards the end of January, so hopefully
   the pre-images will be available by sometime in February, so we can prepare masks
   in Feb (preparing masks in March would be difficult because of other time constraints).

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• true

Pre-imaging Requirements

• The (A) run consists of the pre-images for 8 fields.

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 ?

• YES

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 FORS2 Phase 2 web page ?

• N/A