README web version of /home/usg/OPS/MTS/readme_xml/readme_75048000

Principal Investigator Email Address

• mvannier@eso.org

Estimated Total Execution Time (hours, including overheads)

• 2.5 hours

General Description

• We propose to use TIMMI2 for mapping the dust and gas distribution around
   HM Sge in various N band filters, 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
   measurments 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 fairly bright in the mid-IR (120 Jy) so they should be easily visibile
   in the RTD. 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 smear-and-stripe patterns.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Clear sky ; no other particular constraint

Time-Critical Aspects

• No time-critical aspect. The run B of this proposal is for R Aqr, which
   is four hours later 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