README web version of /home/usg/OPS/MTS/readme_xml/readme_79506500

Principal Investigator Email Address

• cassan@ari.uni-heidelberg.de

Estimated Total Execution Time (hours, including overheads)

• 1.5 h

General Description

• Time critical JHKs - Imaging of planetary Microlensing
  event in progress in crowded Galactic Bulge field with the 
  aim to resolve the event from unrelated background sources.
  
  To be observed as soon as possible, but valid until 31st October.
  
  We prefer the use of the LGSF, but if the laser is not available, 
  we prefer an earlier NGS observation compared to a later laser 
  observation.
  
  There are two suitable NGS marked as R1 and R2 
  in the finding chart(s) 
  
  NGS R1 is the safe first choice. If star R2 however turns out not
  to be double and bright enough for the AO system then the NA can choose R2, 
  since it is closer to the target and may provide better corrections.
  
  
  
  
  Scientific objective:
  
  We want to separate the ongoing planetary Microlensing event
  OGLE-2007-BLG-349 using NACO-S27-JHKs Imaging from
  any unrelated background sources in order to get an estimate
  of the magnitude and type of the lens, the planetary host star.
  
  This observation will establish a reference epoch to be compared
  to an epoch (P81) when the source star will not be magnified anymore.
  
  We will not be able to spatially separate the lens star from the 
  source star (they are aligned within about 1 mas),  but a two epoch
  light curve will enable us to measure the flux of the lens using our
  microlens model.
  
  Obtaining this way a "direct" flux measurement of the planet host star
  will yield to much more precise estimates of the mass and orbit of
  the planet and the properties of its host than compared to 
  the standard analysis based on statistical assumptions of the 
  Galactic lens and source star population.
  
  The earlier the observation of the first epoch (this OB) is
  carried out the larger the gradient of the light curve and the
  better the estimates of the lens and source star fluxes.

Waiver Requests

• Our OB is 1.5 h and exceeds the 1h limit. A request to violate this constraint
   was submitted
  on 9th Oct under WaiverID:  279.C-5065A.01 and was granted on 10th Oct.

Critical Observing Condition Constraints

• Since the target is in crowded Galactic Bulge field the better the seeing
  the better our chances to resolve the microlensing event.
  We ask for SEEING < 0.8 " , AIRMASS < 1.4 and CLEAR conditions.

Time-Critical Aspects

• The earlier the event is observed, the more the source flux 
  will be still amplified, which benefits the scientific return
  by providing a good gradient in flux with the planned 2nd epoch in Period 81 
  when the event will have ended.

Special Execution Requirements

• ---(Empty)---

Special Calibration Information

• We request only the standard calibration plan.

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

If you have PSF reference star OBs, do the names of those OBs begin with
 PSF_ ?

• N/A

If there are Finding Charts attached to your OBs, is the field-of-view
 of at least one of these charts 2' x 2' (with clearly labelled field orientation)
 ?

• YES

Have you clearly marked and labelled your wavefront reference objects
 R1, R2, R3, ... (as specified in the NAOS Preparation Software) on your Finding
 Charts ?

• YES

Have you specified the magnitude of the brightest object in the field-of-view
 for each OB ?

• YES

Are there objects in any of your fields (including standard stars) which
 are brighter than the limits specified in the User Manual and on NACO web Pages
 ?

• NO

If the previous answer is yes, have you given a list of OBs and a justification
 for the brightness limit violation in the general description field ?

• N/A