README web version of /home/usg/OPS/MTS/readme_xml/readme_78080600

Principal Investigator Email Address

• rcwh@astro.ox.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 2

General Description

• This is an imaging programme with NACO to detect eccentric disks (akin
   to that of M31) in the centres of elliptical galaxies. Essentially we are looking
   for anomalies (asymmetries) within the central 1" of the surface brightness profiles
   of the galaxies. Below is a summary of the most important points to note.
  
  1) The targets are the centres of the galaxies. The centre is defined as the region
   within 1" of the most luminous part of the galaxy surface brightness.
  
  2) Please try to ensure that the galaxy centre and the tip-tilt star / natural guide
   star are BOTH in the field of view for OB_img_NGC1374 and OB_img_NGC1399, respectively.
   This should be possible given that the separations are < 18", the jitter box
   width is only 4" and the field of view of the S27 camera is 28". The DIT of the
   exposures have been kept short to avoid the TTS saturating the detector. We wish
   to use the tip-tilt star to aid alignment of the individual frames; a star in the
   field of view allows very accurate frame alignments with errors <0.01" which
   aids detection of small (0.2") asymmetries in the surface brightness profiles. The
   TTS can also be used as a PSF reference. However, please note that priority must
   be given to good, clean imaging of the galaxy centre (see note 3 below); having
   the TTS in the FoV is an additional request, not a requirement. 
  
  3) Please ensure that the galaxy centre does not fall too near the edge of the chip;
   in particular, ensure that the galaxy centre is not badly affected by bad/hot pixels
   which can cluster near the edges of the detector. If the images of the galaxy centre
   were strongly affected by bad/hot pixels, it would be impossible to accurately detect
   eccentric disks.
  
  Additional Requirements for NACO:
  3) For OB_img_NGC1374, the brightest object in the S27 field of view is the tip-tilt
   star m_k = 13.95
  4) For OB_img_NGC1399, the brightest object in the S27 field of view is the tip-tilt
   star m_k = 12.43

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• It is critical to the science goals that the seeing be <=0.6" to achive
   optimal AO correction on the targets.

Time-Critical Aspects

• None.

Special Execution Requirements

• 1) Preference should be given to OB_img_NGC1399 over OB_img_NGC1374. 
  
  2) Please ensure that the galaxy centre and the tip-tilt star are BOTH in the field
   of view for OB_img_NGC1374 and OB_img_NGC1399. This should be possible given that
   the separations are < 18" and the jitter box width is only 4".

Special Calibration Information

• None.

ToO Information

• None.

ToO Activators List

• None

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• None.

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 ?

• 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 ?

• 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_ ?

• 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