README web version of /home/usg/OPS/MTS/readme_xml/readme_79027202

Principal Investigator Email Address

• kohnaka@mpifr-bonn.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 2.0

General Description

• MIDI/AT observations of the oxygen-rich non-Mira AGB star RX Boo.  The
   aim is to probe the physical properties of the outer atmosphere and the dust formation
   zone and to obtain clues
  to understanding the mass-loss mechanism in non-Mira AGB stars.  Note that the target
   RX Boo is observable from April only till June/July.  All OBs in the runs 079.D-0272(A/B/C/D/E)
   should be preferably carried out as close in time as possible.  
  
  Our request for a change from the grism to prism mode has been approved (23.Jan.07).
    The reason for this change is that there are only a very limited number of runs
   executed in the grism mode.  This means that calibrators associated to other programs
   but observed on the same night as our science target will be quite likely (though
   not 100% certain) observed in the prism mode and, therefore, cannot be used for
   calibration of our measurements in the grism mode.  Since our scientific goals can
   be achieved in the prism mode as well, changing to the prism mode would increase
   the reliability of calibration by using other calibrators.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• OBs should be carried out under thin cirrus or better conditions.

Time-Critical Aspects

• None

Special Execution Requirements

• None

Special Calibration Information

• We first selected HD129989 as a calibrator.  However, it turned out to
   be rather faint for MIDI/AT after executing some OBs.  The new calibrator is the
   following:
  
  Name       : del Oph
  Coordinates: 16:14:20.740 -03:41:39.563
  V magnitude: 2.74
  N magnitude: -1.8
  Spec. Type : M0.5III
  UD diam.   : 9.3 +/- 0.5 mas
  Source     : CHARM2
  
  --------------- Information on the old calibrator -------------------------------------
  The calibrator HD129989 is a double system.  The brighter component with V=2.7 is
   the calibrator.  The fainter component with V=5.1 is 3 arcseconds away at a PA of
   339 degrees.
  
  Name       : HD129989
  Coordinates: 14:44:59.208 +27:04:27.38
  V magnitude: 2.7
  N magnitude: -0.53
  Spec. Type : K0II-III
  UD diam.   : 4.2 +/- 0.06 mas
  Source     : MIDI calibrator list

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 ?

• 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

Did you indicate for each science star OB the corresponding calibrator
 star OB (and vice versa) in the 'Instrument Comments' field ?

• YES

Did you check that your chosen calibrator is bright enough for the instrument
 mode used ?

• YES

If you use calibrator stars which are not in the CalVin database, did
 you specify their characteristics in the README file and in the OBs ?

• YES