README web version of /home/usg/OPS/MTS/readme_xml/readme_83077504

Principal Investigator Email Address

• rsed@ast.cam.ac.uk

Estimated Total Execution Time (hours, including overheads)

• 4.05

General Description

• These observations will provide N band spectra of the sources HD113766
   and HD172555 which will also be observed with MIDI in visitor mode under the same
   proposal ID runs A-D.  These sources are main sequence stars with known mid-infrared
   excess emission from dust which may be a signiture of ongoing terrestrial planet
   formation.  The MIDI observations are designed to allow a determination of the location
   of the dust. The observations in this run (E) are designed to determine the spectrum
   of the sources across the MIDI wavelength range to better accuracy than can be acheived
   with MIDI, as previous experience has demonstrated the importance of such data in
   determining the level of resolution acheived on MIDI targets. The two filters chosen
   (8.8um and 11.4um, labelled as 'short' and 'long' in the OB names) have been chosen
   to optimise coverage of the wavelength range relevant to the MIDI observations.
   
  
  In order to meet our science aims the spectra must have well determined calibration
   accuracy, and so we require standard star observations to be taken immediately before
   and after the science observations. The standard star observations linked to a particular
   science OB are named CAL_nameX where name is the name of the science OB.  Two identical
   calibration (standard star) OBs are provided for each science OB, labelled with
   1 and 2 in the place of the X in CAL_nameX, one of which should be executed immediately
   before the science OB and the other immediately afterwards.  
  
  The finding charts in all cases are based on K band 2MASS images.  In all cases
   the target of the observations will be the brightest object in the field in the
   N band. 
  
  No guide stars have been submitted in the OBs, but the guide star catalogue has
   been checked and all targets have a suitable guide star available within 7.5 arcmins.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• The targets should be observed in clear conditions to allow good photometric
   accuracy.

Time-Critical Aspects

• For each set of observations, the sequence must be calibration observation,
   science observation, calibration observation to allow accurate determination of
   the calibration uncertainty.

Special Execution Requirements

• For each set of observations, the sequence must be calibration observation,
   science observation, calibration observation to allow accurate determination of
   the calibration uncertainty.

Special Calibration Information

• As stated in the previous sections, two observations of a standard star
   (one immediately before the science object and one immediately after), are required
   per science target to allow accurate characterisation of the photometric conditions.
    For each science observation the calibration observations are of the same target,
   so that any affects of airmass and change in seeing can be detected, free from concerns
   over change in target. 
  The standard stars were chosen to be the closest targets in the list of 81 standard
   stars provided on the ESO VISIR webpages. 
  The calibration targets are 
  HD 111915 K3.5III (science target HD113766), flux 16.015Jy at 8.8um, 10.742Jy at
   11.4um.
  HD 156277 K2-III (science target HD172555), flux 8.515Jy at 8.8um, 5.523Jy at 11.4um.

ToO Information

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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 ?

• YES

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