README web version of /home/usg/OPS/MTS/readme_xml/readme_81071301

Principal Investigator Email Address

• guy.perrin@obspm.fr

Estimated Total Execution Time (hours, including overheads)

• 20

General Description

• The goal of these observations is to obtain visibilities of NGC 1068 on
   0-8m baselines complementary to MIDI visibilities obtained at much longer baselines.
   All filters of VISIR in the N band are used to sample the whole range of wavelengths,
   except the SiC filter.
  
  It is important that OBs corresponding to a same filter for the calibrator star
   and for NGC 1068 be executed consecutively and without a long interruption between
   a calibrator and science target. The aim is that turbulence conditions be stable
   between two successice OBs in a same filter.

Waiver Requests

• This programme was originally to be performed in VISITOR MODE. Due to
   a problem at Paranal (observatory generator problem followed by the failure of an
   electronic chip which induced a one-week recovery for the instrument) the OBs could
   not be executed in visitor mode unfortunately. ESO decided to turn these observations
   from VISITOR to SERVICE mode. But the VISIR burst mode is not offered in service
   mode.
  
  I therefore request a waiver so that these burst mode OBs be executed in service
   mode.

Critical Observing Condition Constraints

• Good seeing is required for these observations : 0.8 arcsec.
  
  Should seeing degrade a little bit (from 0.8 arcsec to 1.2 arcsec) between the calibrator
   and NGC 1068, please get the data on NGC 1068 without resuming data acquisition
   on the calibrator)

Time-Critical Aspects

• None.

Special Execution Requirements

• OBs have been numbered according to the preferred sequence of observation.
  
  It is important that two successive OBs in a same filter (calibrator : HD 11353
   then Science Target NGC 1068) be executed with a short time delay so that turbulence
   can be considered statistically the same for the two OBs.
  
  The first 40 OBs are twice repeated observations of a Calibrator - Science target
   sequence in all filters requested. This first half has the highest priority (1)
  
  
  The next 40 OBs are repeated observations in some filters (Ne_II series, SIV series,
   ArIII and PAH2_2) where the SNR is a priori lower. They have been given second priority.

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 ?

• 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?

• YES