README web version of /home/usg/OPS/MTS/readme_xml/readme_82503100

Principal Investigator Email Address

• Fabien.Malbet@obs.ujf-grenoble.fr

Estimated Total Execution Time (hours, including overheads)

• 2.5

General Description

• The goal of the observations is to get a visibility triplets on 2 components
   of a YSO binary Z Cma. The two components are Z CMa NW and Z CMa SE separated by
   100ms at PA=120deg.
  NIR and V magnitudes might not be accurate since the Z CMa system is currently under
   an outburst of 2 magnitude which may changes the repartition of flux. We have:
   + in Dec 1989 (1991AJ....102.2073K):
       - Vtot = 9.5
       - Htot = 5.1, with H(SE)=5.4 and H(NW)=6.5
       - Ktot = 3.8, with K(SE)=5.1 and K(NW)=4.2
    + 2 Dec 2008 (Grankin et al. priv. comm.):
       - Vtot = 9.04 , i.e. DeltaVtot = -0.5
  
  Therefore we can anticipate: Htot = 4.6-5.1, Ktot= 3.3-3.8, H(SE)=4.9-5.4, H(NW)=6.0-6.5,
   K(SE)=4.6-5.1 and K(NW)=3.7-4.2 depending on which component is undergoing the out
   burst. The outburst might be also bluer. So we took the averaged values:
   - Htot=4.8, H(SE)=5.1, H(NW)=6.2
   - Ktot=3.5, K(SE)=4.8, K(NW)=3.9
  
  We chose the UT2-UT3-UT4 configuration, but the program can also be conducted with
   any other UT triplets (see Note of Table 15 of P1 proposal).
  
  The acquisition might be tricky (see finding chart) since the UTs will resolve the
   binary. We suggest to first acquire Z CMa and get the brightest component with IRIS
   and check that the second component is there by applying an offset of -0.1*sin(120deg)=-0.086
   arcsec in RA and 0.1*cos(120deg)=-.05 arcsec in Dec or the inverse quantity (unknown
   position) and come back.
  
  The sequence of acqusition would be then SCI_ZCMa_NW/CAL_HD45420/ZCMa_SE/CAL_HD60742
   several times if time allows it.
  
  Be careful the position of target Z CMa for NW and SE are the same since we do not
   have the accuracy to have them. It is probably the position of the photocenter.
  
  we want to observe the full Medium_K_1_2.1 band using FINITO with the minimum DIT.
   We therefore took 200ms for the DIT.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Conditions required to have FINITO working.

Time-Critical Aspects

• Must be observed during the UT run between 12-dec-2008 and 17-dec-2008,
   because we want to follow the decline of the outburst.

Special Execution Requirements

• We propose the following sequence:
  - acq of Z CMa NW first and check of Z CMa SE (see general description)
  - sequence of SCI_ZCMa_NW/CAL_HD45420/ZCMa_SE/CAL_HD60742

Special Calibration Information

• No. The sequence SCI_ZCMa_NW/CAL_HD45420/ZCMa_SE/CAL_HD60742 is preferred.
  
  - CAL_HD60742: diam from CalVin 1.09+/-0.01 mas
  - CAL_HD45420: diam from Calvin 0.96+/-0.01 mas

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 ?

• YES

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 indicate for each science star OB the corresponding calibrator
 star OB (and vice versa) in the 'Instrument Comments' field ?

• YES

Did you check that your chosen calibrator is bright enough for the instrument
 mode used ?

• 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 ?

• YES

Do you use the same DIT for pairs of science target and associated calibrator?

• YES

Are the magnitudes of science target and calibrator within +/- 1 mag
 ?

• YES

Did you verify that your coordinates are as accurate as possible (2Mass
 coordinates recommended) and that they include proper motions if available ?

• YES

Did you specify the LST range of the calibrators such that they cover
 the range from 30 min before the start of the LST range of the science target to
 30 min after the end of the LST range of the science target ?

• YES