README web version of /home/usg/OPS/MTS/readme_xml/readme_78048800

Principal Investigator Email Address

• bsilva@astro.up.pt

Estimated Total Execution Time (hours, including overheads)

• 3

General Description

• The relation between the x-ray emission and the accretion in young stars
   is not yet understood. In this observation we have selected Chandra Orion Ultradeep
   Project (COUP) X-Ray sources, that we will observe spectroscopically in 2 different
   bands, using GIRAFFE (MEDUSA) filters HR12 and HR21. We will do veiling measurements
   in the HR12 wavelength range (as well as some emission line analysis), and we will
   do model line fitting to the CaII Infrared Triplet lines observed in the HR21 wavelength
   range. In this way we can correlate accretion tracers with the X-Ray emission.
  
  We use 3 observing blocks (OB) of 1 hour. In each OB, 20 min. are needed for calibration
   and overheads. This leaves us 40 minutes, that we divide into 2 sets of 20 minutes,
   to avoid saturation in some of the more bright stars. We use two OBs for the HR21
   filter and one OB for the HR12 filter. With the two OBs on the HR12 filter we want
   to calculate veilings on about 85% of our sample. The rest of the sample will be
   used for the analysis of HeI and NaD lines. In relation to the analysis of the infrared
   CaII triplet line profiles, with the two exposures of 20 min we will be able to
   make line model fits on about 85% of our sample.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• * Observe with seeing less than 1.0
  * Observe with sky transparency CLEAR
  * Observe with a moon more than 20deg away from our field

Time-Critical Aspects

• No special requirements but observe preferentially in December.

Special Execution Requirements

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Special Calibration Information

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ToO Information

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ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

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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

Did you specify in your OBs the hour angle range for which your Target
 Setup files are valid ?

• YES

Did you specify in your OBs the magnitudes of FACBs and Guide Star for
 all your fields ?

• YES

Are the FACBs and Guide Star in the brightness ranges specified in the
 FLAMES manual ?

• YES

Did you enter the expected signal to noise in your OBs ?

• YES