README web version of /home/usg/OPS/MTS/readme_xml/readme_80017900

Principal Investigator Email Address

• tratzka@aip.de

Estimated Total Execution Time (hours, including overheads)

• 01:00:43

General Description

• Science Goal: This is an imaging programme with the goal to determine
   the exact separations and position angles of the companions in two stellar triples
   (T Tau and LHS 1070).
  
  Instrumental Setup: We want to use NACO in it's imaging mode in the K-band! Since
   it provides the highest spatial resolution, the S13-camera is utilised. The reference
   sources for the AO-system are the main components of the triples, i.e. the brightest
   stars in the near-infrared. They should be centered during the acquisition. Afterwards,
   a series of generic offsets shifts the triples to all four quadrants of the detector.
   
  Integration Time: The DIT in in the science template is chosen is such a way that
   we expect to be well inside the linearity range of the detector. Since we used for
   the acquisition exposure a DIT that is equal to the DIT of the science template,
   the acquisition image may help to find the correct DIT for the science template.
   Please adjust the DIT in the science template accordingly after the acquisition!
   The NDIT shall be adapted to the DIT to use in total 20 minutes for each OB.
  
  Calibration: In addition to T Tau and LHS 1070, a field in the Trapezium around
   TCC 039 is observed to calibrate the pixelscale and the orientation of the detector.
   The three OBs shall thus be executed within one night if at all possible. In the
   case that this is not the case, please observe the three OBs as close as possible
   in time. No special PSF-calibrators are required, because the brightest source of
   each triple will serve as reference for the other two objects.
  
  Timing: To allow a good coverage of the orbits, the time interval for run A is restricted
   to October 2007, while run B shall be executed at the end of 2007/beginning of 2008
   (later LHS 1070 is setting too early).
  
  Brightest targets in the field-of-view (all observations done with N90C10 dichroic):
  LHS 1070: 5.3 mag (science target itself)
  T Tau:    8.2 mag (Science target itself)
  TCC 039:  4.4 mag

Waiver Requests

• A request ("TargetChangeRequest") to observe not only LHS 1070 and TCC
   039 but also T Tau has been sent to usd-help@eso.org and was accepted on 3 July
   2007.

Critical Observing Condition Constraints

• Brightest targets in the field-of-view (all observations done with N90C10
   dichroic):
  LHS 1070: 5.3 mag (science target itself)
  T Tau:    8.2 mag (Science target itself)
  TCC 039:  4.4 mag

Time-Critical Aspects

• Timing: To allow a good coverage of the orbits, the time interval for
   run A is restricted to October 2007, while run B shall be executed at the end of
   2007/beginning of 2008 (later LHS 1070 is setting too early).

Special Execution Requirements

• none

Special Calibration Information

• Calibration: In addition to T Tau and LHS 1070, a field in the Trapezium
   around TCC 039 is observed to calibrate the pixelscale and the orientation of the
   detector. The three OBs shall thus be executed within one night if at all possible.
   In the case that this is not the case, please observe the three OBs as close as
   possible in time. No special PSF-calibrators are required, because the brightest
   source of each triple will serve as reference for the other two objects.

ToO Information

• n/a

ToO Activators List

• n/a

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• n/a

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 ?

• 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 ?

• 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 ?

• 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

If you have PSF reference star OBs, do the names of those OBs begin with
 PSF_ ?

• N/A

If there are Finding Charts attached to your OBs, is the field-of-view
 of at least one of these charts 2' x 2' (with clearly labelled field orientation)
 ?

• YES

Have you clearly marked and labelled your wavefront reference objects
 R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding
 Charts ?

• YES

Have you specified the magnitude of the brightest object in the field-of-view
 for each OB ?

• YES

Are there objects in any of your fields (including standard stars) which
 are brighter than the limits specified in the User Manual and on NACO web Pages
 ?

• NO

If the previous answer is yes, have you given a list of OBs and a justification
 for the brightness limit violation in the general description field ?

• N/A