README web version of /home/usg/OPS/MTS/readme_xml/readme_77068401

Principal Investigator Email Address

• romanow@astro-udec.cl

Estimated Total Execution Time (hours, including overheads)

• 14.8

General Description

• This is an MXU programme to take spectra of globular clusters (to V=22.7)
   around the galaxy NGC 4374, for the purpose of obtaining radial velocities.  Pre-imaging
   came from FORS2 R_Special-band images.
  
  See Special Execution Requirements.

Waiver Requests

• Waiver Request has been granted for long OB execution time.

Critical Observing Condition Constraints

• See constraints in OBs.  Probable acceptable dates for sky surface brightness
   (Moon below horizon) are:
  
  1-2 Apr
  3-4,19-20 Apr (parts of the night)
  21-30 Apr
  1,2,17-18 May (parts of night)
  19-29 May
  15-22 Jun

Time-Critical Aspects

• N/A.

Special Execution Requirements

• Note that the rotator angle is -90 deg.
  
  There are several important alignment peculiarities.  Long integration times for
   acquisition and thru-slit are needed with B filter, and even then not all the reference
   stars may be visible.  This is because of bright star saturation in the pre-images,
   and unavailability of workable g or V filter with FORS2.  We do not want to use
   R as in the pre-images because of differential refraction between R and the spectral
   range down to 4200 Ang.  If B really isn't working out, please go to R_SPECIAL as
   a back-up (exposure times then needn't be so long).  Note that some reference stars
   are bluer than average, so should show up better in the acquisition images than
   is apparent in the pre-images.
  
  When checking the thru-slit alignment, note that most of the objects are intentionally
  off-centre in the 'y' direction (they should be centred in the 'x'=dispersion direction).
  So for 'y' alignment, look only at reference star slits (which are centred).  See
   also special comment for Field 01.

Special Calibration Information

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ToO Information

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ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

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Source(s) of Pre-imaging

• FORS2

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 ?

• 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