README web version of /home/usg/OPS/MTS/readme_xml/readme_83094001

Principal Investigator Email Address

• a.m.shone@durham.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 17.83

General Description

• Spectroscopic redshifts of B-R, R-I colour selected galaxies
  that have a limiting magnitude R>25
  are to be determined using VIMOS MOS. These are in the
  surrounding field-of-view of the central HDF quasar J2233-6033.
  2 masks have been designed for two pointings with OBs that
  will use the LR-red grism. 
  
  The first pointing has the quasar in the centre of
  the field-of-view and will be exposed for 13 sub-eposures
  each lasting 1700 seconds. This is to be achieved by
  4 sets of 2 hour OBs that comprise of 3 sub-exposures 
  for each set of calibration overheads, the necessary waiver
  has been granted. 
  A jitter of +/- 1" along the slit is to be done between each of the 3 sub-exposures
  to aid in the sky subtraction. The sequence of off-sets is
  1. on target
  2. -1" along the slit.
  3. +2" along the slit.
  
  There will then be a final 1-hour OB comprising of 1 1700 s
  exposure with overheads. These OBs all have the prefix
  MOS_J2233_P1.
  
  The exact same procedure is then carried out for the
  second pointing that has an off-set 3' x 3' from
  the central quasar. These OBs have the prefix
  MOS_J2233_P2.
  
  This program is the 3rd in three that have targetted galaxies
  in the foreground of quasars in order to correlate the
  galaxy positions with lya absorbers in the quasar absorption
  spectra.

Waiver Requests

• A waiver has been granted to allow 2 hour OBs
  to pertmit 3 sub-exposures of 1800 to each
  calibration and aquisition overhead.
  WaiverID:  083.A-0940B.01

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• None

Special Calibration Information

• None

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

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

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