README web version of /home/usg/OPS/MTS/readme_xml/readme_76501100

Principal Investigator Email Address

• jahnke@mpia.de

Estimated Total Execution Time (hours, including overheads)

• 4:00:00

General Description

• We want PAH2 imaging of the QSO HE0450-2958 and a PSF calibrator star.
   The QSO is in a complex system:
  There is substantial MIR flux (known from IRAS), but the source is unclear. To the
   E-S-E there is a companion galaxy (1.5" distance) which might be the main emitter
   of MIR emission. To the W-N-W there is a foreground star (also 1.5" distance).
  
  
  Information from the NIR H-band: The QSO is 6x brighter than the integrated companion
   galaxy and 3x brighter than the star in the H-band. In the N-band the star might
   be absent or faint.
  
  
  Strategy: We need the PSF observed close in time to the science target, so we can
   use it to remove the QSO nucleus afterwards. So we need contiguous execution of
   first one PSF OB then of one science OB. There are 3 pairs of such OBs to be executed,
   totaling 4h, so each pair 80 minutes. We have an approved waiver for this (276.B-5011A.01.WAV).
  
  
  How to find the object: We submit two finding charts for the science OBs, one from
   2MASS K-band, one with higher resolution in H-band (SOFI). The target is the central
   source in the SOFI H-band image, the three objects are not separated in 2MASS K-band.
   In acquisition:
  
  *if there are 3 objects visible, it is the CENTRAL source
  *if there are 2 objects visible, and ONE is a point source, it is the POINT SOURCE
  *if there are 2 objects visible, and TWO are point sources, then it is the SOUTH-EASTERN
   point source
  *if there are 2 objects visible, but it is not clear if any is a point source or
   not, point IN THE CENTER BETWEEN THOSE OBJECTS
  *if there is 1 object visible, POINT TO THIS OBJECT
  
  Since our chopping throw is 8", "pointing" means 4" offset both in RA and DEC from
   the detector center.
  
  
  Pointing: We already entered coordinates that put the target into the top-left (N-E)
   quadrant of the detector. This is true for both PSF stars and science target.

Waiver Requests

• Waiver request 276.B-5011A.01.WAV (requested 17 Nov 2005, granted 18 Nov
   2005): Extention of OB length to a maximum of 93 minutes. We wanted to reduce overheads
   by being allows to do both deep science obs plus contiguous PSF calibrator observation.
  
  We put these now in SEPARATE OBs, one for the PSF, one for the science target, but
   they are to be executed contiguously.

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• There are 6 OBs, 3 for point spread function stars, 3 for the science
   target. These must be executed in pairs, first one PSF OB, then one science OB.
   The pairs are
  
  "CAL PSF1_HE0450_1"   and     "HE0450_2"
  "CAL PSF3_HE0450_3"   and     "HE0450_4"
  "CAL PSF3_HE0450_5"   and     "HE0450_6"

Special Calibration Information

• We have point spread function calibrator OBs. The execution contraints
   are described in "Special Execution Requirements".

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 ?

• 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 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?

• NO