README web version of /home/usg/OPS/MTS/readme_xml/readme_75048001

Principal Investigator Email Address

• mvannier@eso.org

Estimated Total Execution Time (hours, including overheads)

• 1.5 hour

General Description

• We propose to use TIMMI2 for mapping the dust and gas distribution around
   R Aqr, in order to better constrain some characteristic physical processes of Mira
   symbiotic systems. In particular, we want to: 
  - Image a map around the central region, which will be complementary with high-resolution
   measurements of the inner structures made with MIDI at the same wavelengths
  - compare the size and flux density of the (silicate) dust and of the IR continuum
   regions, by measuring them with different spectral filters, respectively centered
   before (N8.9), around (N9.8) and after (N12.9) the silicate peak emission wavelength.
  
  The source is very bright in the mid-IR (1500 Jy). We're conscious that this will
   probably give some saturation around the central source, but the larger structures
   shoud only be marginally affected be non-linearity. 
  We've put large chop and nod throws (50 arcsec) so that negative images fall out
   of the array, in order to minimize cross-talk and/or smear-and-stripe patterns.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Clear Sky. No particular constraints

Time-Critical Aspects

• No time-critical constraint. The run A of this proposal is for HM Sge,
   which is four hours earlier in RA. Actually, the two objects may be observed within
   the same night or run.

Special Execution Requirements

• ---(Empty)---

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 ?

• 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