README web version of /home/usg/OPS/MTS/readme_xml/readme_77048601

Principal Investigator Email Address

• halliday@arcetri.astro.it

Estimated Total Execution Time (hours, including overheads)

• 28.49 hours

General Description

• Our programme requests VIMOS/MOS spectroscopy of galaxies in 4 VIMOS fields
   in
  a ~ 30' x 30' region around a z=0.8 galaxy cluster.
  An overall finding chart showing these 4 fields can be found at
  http://www.mpe.mpg.de/~milvang/tmp/cl1216_VIMOS_footprints3.ps.gz
  
  In P75 this programme was first approved, as 075.A-0649. Our pre-imaging was
  acquired (run A) done and the masks and OBs designed etc., but sadly not a
  single MOS OB (run B, 28.4 hours) was ever executed.
  
  In P77 we reapplied and were awarded an almost identical time allocation,
  077.A-0486. We have been informed that our P75 pre-imaging can still be used
  in P77 and we have not used the 2 hours allocated to our P77 pre-imaging
  run, 077.A-0486(A).
  
  Description of our MOS observations, 077.A-0486(B):
  
  For each field we have 4 identical OBs each doing 1 hour 7.5 min of
  integration (split in 5 x 13.5 min), giving a total exposure time of 4.5 hour
  per field. Each OB has an execution time of 1 hour 43 min, for which we have
  a phase 2 waiver. The OBs include night time arcs and flats.
  
  Our targets have total I-band magnitude in the range 19-22. In each quadrant
  we have 2-3 reference "slits" (4" x 4" boxes) with stars that were bright but
  unsaturated in our 100 sec R-band pre-images. In each OB we give the exact
  number of reference slits to look for.
  
  We take 5 exposures (of 13.5 min) at offset positions -1.6 +1.6 -0.8 +0.8 0
  arcsec, where 0 is the preset position, to be able to correct for fringing.
  
  The OBs should be observed within 2 hours of culmination. This corresponds to
  an airmass below 1.17, but we had to enter 1.1 in the constraints set, since
  only 1 decimal was allowed.
  
  We have two night time calibration OBs, called MOS_CAL_*, which
  each observes a hot star (spectral type O or B). The OBs include night time
  arcs.
  
  The total execution time for the run is 28.5 hours. This is 0.5 hours more
  than allocated for this run (run B), but since we will not be using the 2
  hours allocated for run A, we hope that this is acceptable. If it is not, one
  of our hot star calibration OBs (MOS_CAL_*) that has observations for only one
  VIMOS quadrant can be removed. Many thanks.

Waiver Requests

• We submitted a waiver on 7 Feb 2006, and it was approved on 8 Feb 2006;
  it's reference number is 077.A-0486.
  
  The waiver allows us to have OBs with an execution time of 1 hour 43 min.

Critical Observing Condition Constraints

• Targets to be observed within +-2 hours of culmination.

Time-Critical Aspects

• none

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)---

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 ?

• YES

Have you included OBs for any calibrations that you need but which are
 not part of the Calibration Plan ?

• YES

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

Did you specify suitable guide stars for all your OBs using Guidecam
 ?

• N/A

Did you check that the chosen guide stars are suitable for all the offset
 positions and that they do not produce unacceptable vignetting of the field of view
 ?

• N/A