README web version of /home/usg/OPS/MTS/readme_xml/readme_76075700

Principal Investigator Email Address

• feldt@mpia-hd.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 2.4

General Description

• MIDI investigation of several massive young stellar objects.
  
  The objects are very faint in the optical, so guiding and tip/tilt correction on
   the science
  targets themselves is not possible.
  Since the regions mostly suffer from strong dust extinction, also the stars in the
   further
  vicinity of the science targets remain faint.
  
  With the AT's we aim for quite specific baseline length / projected position angle
  combinations to complement our MIDI observations already performed with the UT's.
   This 
  is more or less reflected in the siderial time constraints.
  
  We hope for the following orientations for the 16m baseline:
  
  AFGL4176     : 1 visibility point around 31 deg
  
  MonR2IRS3 SW : 1 visibility point around 55 deg
  
  Orion BN     : 1 visibility point around 56 deg
  
  For MonR2 IRS3 SW, two objects might appear in the FOV (see second finding chart).
   We
  intend to obtain visibilities for the much stronger SW component. (The NE component
   is
  too weak for AT observations.)

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• none

Time-Critical Aspects

• none

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• Due to the presently quite high correlated flux limits for the ATs, we
   included OBs 
  for the strong calibrators HD48915 (to be used together with OrionBN and Mon R2
   IRS3 SW) and
  HD150798 (to be used together with AFGL4176). However, these objects have a quite
   large
  angular distance from the science objects and no experience seems to exist about
   their
  viability as MIDI calibrators. O.k., try these calibrators. Nevertheless, we 
  let the original choice of calibrators (HD50778 and HD107446) remain in the OB package.
   
  For these calibrators we had good experience at the UTs. Perhaps they can be checked
   some
  time despite their N band flux being smaller than 50 Jy ...

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 ?

• YES

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 ?

• 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

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 ?

• N/A