README web version of /home/usg/OPS/MTS/readme_xml/readme_60941400

Principal Investigator Email Address

• pmoller@eso.org

Estimated Total Execution Time (hours, including overheads)

• 1 hour 59 mins

General Description

• The target is very faint and it is located 1.4 arcsec to the south-east
   (PA=136.5 deg)
  of the V=18.9 quasar 2138-4427. The target is too faint to be visible during acq.
   The
  target is aquired by choosing a slit PA of -43.5 deg (placing the target below the
   QSO
  on the slit), and then perform the acq directly on the QSO. A generic "nod-pattern"
  of +2, -4, +3.3, -4, +3.3, -4 will move the target 2 arcsec down, 4 up, 3.3 down,
   etc.
  For the "poor seeing" OB we do only 5 offsets so the offsets are chosen a bit larger
  but the general idea is the same.
  
  The arrow on the FC points to the QSO. The target is below/left of the QSO on the
   FC.
  The arrow also marks the slit orientation (slit PA + 180 deg) on the sky. In defining
   the
  offset pattern I have assumed that "+X along the slit" is in the direction of the
  arrow, and that the QSO will be centered on the slit. Note that because the actual
   target
  is then *NOT* centered on the slit, the offset pattern is not symmetrical, and it
   is
  very important to use the chosen slit PA and not (slit PA + 180) which would cause
   the
  target to wander off the slit. It is also important that my assumption about which
   way
  X is positive along the slit (down/south in the default PA=0 position) is correct
   (I have
  followed the definition in the manual closely so it *should* be correct). If you
   see that
  it is not, then the signs of the offsets are wrong.
  
  The run has two OBs. The exact redshift of the target is not known, so it is not
   known if
  the target emission lines will be close to or far away from sky emission lines.
   Therefore,
  to optimize the search for emission lines we use two strategies. In one OB we use
   a narrow
  NIR slit (requiring good NIR seeing), in the other we use a wider NIR slit.
  
  Note that it is the seeing in the NIR which is important so execution decision should
   be
  based on NIR seeing conditions.
  
  Standard calibrations (telluric standard) is enough. I have no preference for spectral
  type. TS taken close in time and at roughly the same airmass would be best, but
   if it does
  not fit well into the nightly schedule then a bit of flexibility is also OK.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• One OB has no strong requirements, the other should only be executed in
   good seeing, but
  the seeing relevant for this OB is the NIR seeing.

Time-Critical Aspects

• none

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• 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 specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• 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