README web version of /home/usg/OPS/MTS/readme_xml/readme_79041000

Principal Investigator Email Address

• mark.clampin@nasa.gov

Estimated Total Execution Time (hours, including overheads)

• 10.5

General Description

• Our science goal is to image extremely faint, extended mid-IR emission
   associated 
  with the bright, nearby star Fomalhaut.  To map the entire disk area, we will use
   a 
  2 tile mosaic imaging scheme.  After slewing to Fomalhaut, we will rotate the VISIR
   
  detector by 66 degrees to place the major axis of the Fomalhaut disk in alignment
   with 
  the "x-axis" of VISIR.  We have specified acquisition offsets of RA=-4 arcsec, DEC=9
   arcsec
  for "L1-L5" imaging and RA=4 arcsec, DEC=-9 arcsec for "R1-R4" imaging.  After our
   targets 
  are placed in the center of the VISIR FOV in the acquisition template, the "- Offset"
   
  value sent to the telescope 
  will shift our targets along the +x axis of the rotated FOV (for "L1-L5") and along
   the 
  -x axis of the rotated FOV (for "R1-R4").  Per our 2nd finding chart (see following
   
  sentences), this will allow us to map the "Left-side" of our object's disk ("L1-L5")
   
  and the "Right-side" of our object's disk ("R1-R4").  ***WE HAVE ATTACHED A SECOND
   
  "FINDER CHART" IMAGE WHICH EXPLICITLY SHOWS THE MAPPING STRATEGY WE ARE AFTER. 
   WE 
  REQUEST THAT THE VLT STAFF CHECK OUR PRESENT VISIR SETTINGS IN CONTEXT WITH THIS
   IMAGE TO ENSURE 
  FULL SUCCESS OF THE PROGRAM.***  Immediately following or preceeding 
  each science OB, we will image a CAL_PSF (psf star) OB to facilitate our efforts
   to image 
  faint, extended emission associated with Fomalhaut.
  
  Note that the finder chart for Fomalhaut and HD 217484 are given in the 2MASS k-band.
  Both targets are naked-eye (visual) stars and will be the brightest sources in the
   FOV, 
  thus the observer should have no problems identifying the correct source from our
   
  attached finder charts.
  
  We have successfully requested a phase-II waiver to image sequential Fomalhaut+PSF
   
  OB sequences.  These science-PSF OB pairs are organized into individual folders
   in our 
  phase 2 file, such that our linked sequences are:
  
  1) "Fomal_L1_imaging" is to be immediately followed/preceeded by "CAL_L1_PSF_HD217484"
  2) "Fomal_L2_imaging" is to be immediately followed/preceeded by "CAL_L2_PSF_HD217484"
  3) "Fomal_L3_imaging" is to be immediately followed/preceeded by "CAL_L3_PSF_HD217484"
  4) "Fomal_L4_imaging" is to be immediately followed/preceeded by "CAL_L4_PSF_HD217484"
  5) "Fomal_L5_imaging" is to be immediately followed/preceeded by "CAL_L5_PSF_HD217484"
  6) "Fomal_R1_imaging" is to be immediately followed/preceeded by "CAL_R1_PSF_HD217484"
  7) "Fomal_R2_imaging" is to be immediately followed/preceeded by "CAL_R2_PSF_HD217484"
  8) "Fomal_R3_imaging" is to be immediately followed/preceeded by "CAL_R3_PSF_HD217484"
  9) "Fomal_R4_imaging" is to be immediately followed/preceeded by "CAL_R4_PSF_HD217484"

Waiver Requests

• Waiver request 079.C-0410A.01.WAV was submitted and accepted on 29 Jan
   2007.
  The waiver links sequential observations of target + PSF OB blocks:
  
  1) "Fomal_L1_imaging" is to be immediately followed/preceeded by "CAL_L1_PSF_HD217484"
  2) similarily, "Fomal_L2_imaging" is linked to "CAL_L2_PSF_HD217484"
  3) similarily, "Fomal_L3_imaging" is linked to "CAL_L3_PSF_HD217484"
  4) similarily, "Fomal_L4_imaging" is linked to "CAL_L4_PSF_HD217484"
  5) similarily, "Fomal_L5_imaging" is linked to "CAL_L5_PSF_HD217484"
  6) similarily, "Fomal_R1_imaging" is linked to "CAL_R1_PSF_HD217484"
  7) similarily, "Fomal_R2_imaging" is linked to "CAL_R2_PSF_HD217484"
  8) similarily, "Fomal_R3_imaging" is linked to "CAL_R3_PSF_HD217484"
  9) similarily, "Fomal_R4_imaging" is linked to "CAL_R4_PSF_HD217484"

Critical Observing Condition Constraints

• None; aside from requirement that the seeing be better than 0.8 arcsec
   and the sky transparency be clear.

Time-Critical Aspects

• None

Special Execution Requirements

• As discussed in the General Description and Waiver Requests section, ALL
   of our science 
  target OBs must be immediately followed/preceeded by observations of a PSF calibration
   
  star.  We have specifically outlined these linked observation OBs in the General
   Description.

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 the provided finding chart is at a different wavelength than the observations,
 did you clearly describe in the README file how to identify the target?

• YES

Did you specify a guide star brighter than V=12mag within a field of
 r=5arcmin around the science target?

• YES