README web version of /home/usg/OPS/MTS/readme_xml/readme_77010502

Principal Investigator Email Address

• gaspard.duchene@obs.ujf-grenoble.fr

Estimated Total Execution Time (hours, including overheads)

• 5h36m

General Description

• The goal of this proposal is to obtain a high-SNR 8-13 micron spectrum
   of the source WL 20 S, known as an "infrared companion" to 2 well-known T Tauri
   stars. It is unclear whether this infrared companion is an embedded protostar associated
   with more evolved sources or a T Tauri star observed with a peculiar geometry. We
   plan on studying the shape and strength of the silicate absorption/emission feature
   in combination with previously obtained K- and L-band NACO images, which revealed
   that the object could indeed be an edge-on disk source, and with upcoming N- and
   Q-band broadband images. We also will be searching for the presence of PAH emission
   features in the spectrum of this source.
  
  The source is slightly elongated along PA 73 degrees (measured East from North),
   with an expected intrinsic FWHM of about 0.3-0.4" in the mid-infrared. We have selected
   to align the slit with the source elongation to obtain the full spectrum of the
   target.
  
  WL 20 S is the south-eastern component of a tight triple system. In the K-band image
   used in the finding chart, WL 20 S is the faintest of all thrre components. In the
   mid-infrared however, WL 20 A is the brigthest component of the system, the other
   two stars being at least 6 times fainter. The target should therefore be easy to
   identify; its brightness at 12.5 micron is 610 mJy.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• N/A

Time-Critical Aspects

• N/A

Special Execution Requirements

• N/A

Special Calibration Information

• Standard calibrations, performed under the calibration plan for VISIR
   low-resolution spectroscopy, is sufficient for our purposes.

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

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 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