README web version of /home/usg/OPS/MTS/readme_xml/readme_79042000

Principal Investigator Email Address

• mark.clampin@nasa.gov

Estimated Total Execution Time (hours, including overheads)

• 14.4

General Description

• Our science goal is to image extremely faint, extended emission surrounding
   a bright star in J and Ks, using the NACO coronagraph.  As remarked by NACO support
   scientist Dr. L. Tacconi-Garman, it is inherently difficult to chose the most apropriate
   DIT time for coronagraphic imaging, as the amount of "spill-over" of the target
   star outside of the coronagraphic mask will depend on observing conditions and placement
   of the star behind the mask itself.  We have used NACO GTO observing programs publically
   available in the VLT science archive to assist our DIT choices, along with the online
   NAOS exposure time calculator.  Our goal is, of course, to sample as much of the
   linear full-well depth of the detector as possible.  **As such, we request that
   the VLT staff use their best judgement in executing our program in real time service
   mode, to the extent allowable under present VLT observing rules.  If conditions
   allow, we would of course welcome the use of longer DIT times (at the expense of
   less NDITs, for example).**
  
  Our science and PSF stars are bright (as is clear from the attached finder charts);
   hence, these stars will serve as their own natural guide stars.  Our science target,
   HD 107146, is the brightest star in its FOV (V=7.1).  Our PSF reference star, HD
   120066, is the brightest star in its FOV (V=6.3).
  
  Per our waiver request, EACH of our science OBs should be immediately followed by
   the execution of a linked PSF star OB.  We have used the nomenclature of these OBs
   as requested by ESO.

Waiver Requests

• Waiver request 079.C-0420A.01.WAV was submitted and approved on January
   30, 2007.  This 
  requests grants us permission to link each of our 1 hour duration science OBs with
   a 
  complimentary PSF star OB.  PSF star OBs are to be observed IMMEDIATELY 
  following our science target OBs.

Critical Observing Condition Constraints

• Aside from the stated requirements of better than 0.8 arcsec seeing and
   clear sky transparency, there are no critical observing condition constraints.

Time-Critical Aspects

• None

Special Execution Requirements

• As discussed in the General Description and Waiver request section, each
   of our science OBs 
  MUST be immediately followed by a PSF reference star OB.  We have followed the 
  requested nomenclature in naming these PSF star OBs and linking them to the appropriate
   
  science OBs.

Special Calibration Information

• ---(Empty)---

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• ---(Empty)---

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 ?

• 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 PSF reference star OBs, do the names of those OBs begin with
 PSF_ ?

• YES

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