README web version of /home/usg/OPS/MTS/readme_xml/readme_84083701

Principal Investigator Email Address

• sofia@astro.lu.se

Estimated Total Execution Time (hours, including overheads)

• 2h 35min

General Description

• The observations concerns spectroscopic observations of dwarf stars situated
   in the galactic bulge but that are, at the time of observation, lensed by a foreground
   object. In this way the star is greatly magnified. At the time of the lensing event
   the star gets many magnitudes brighter, reaching magnitudes brighter than about
   V=15 (when the star is not lensed it has a magnitude of V=19-20). Our programme
   is designated to obtain high-resolution spectra at the time of the lensing event.
  The observations are standard observations with
  UVES. The finding charts (FC) will be unusual as they are prepared _prior_ to the
   lensing event producing the full magnification. The triggers for these observations
   come from the MOA and OGLE collaborations. Both monitor in I, hence our triggers
   will in practice be based on the I-band magnitudes. The FC will also be in the I-band.
  For each trigger we have two OBs - one for the science target and one for a B star
   (for removal/identification of telluric lines).
  Also for the Bstar we will submit the coordinates and perhaps modify the exposure
   time at the time of the trigger. This B star should be observed within 2 hours of
   the observation of the lensed bulge dwarf star but need not be observed straight
   after. The finding chart for the B star will be submitted at the time of the trigger.

Waiver Requests

• We have submitted a waiver request. This was granted.
  
  We have been allowed to obtain the full exposure (4x1800s) in one single OB.
  
  Copy of waiver request granted: 27 July 2009
  
  Hi Sofia,
  
  The requested waivers for all three runs 084.B-0837(A), (B) and (C) are approved.
  Of course, OB classification will be done based on the first hour only.
  
  regards,
  Gayandhi.

Critical Observing Condition Constraints

• N/A

Time-Critical Aspects

• N/A

Special Execution Requirements

• As we are observing towards the Galactic Bulge the fields are crowded.
   It therefore becomes important to chose an appropriate slit angle in order to ensure
   that contaminating light from nearby stars does not enter the slit. We will provide
   a suitable angle at the time of triggering. Hence, the observer should not have
   to worry about this.

Special Calibration Information

• N/A

ToO Information

• Each activation includes the observation of one lensed Bulge dwarf star
   and one B star (for the removal of telluric lines). The B star should be observed
   close in time to the main science observation. But they need not be observed straight
   after each other. The activator will provide coordinates for the Bulge dwarf star
   and for the B star. S/he will also provide finding charts for both targets. These
   finding charts will be based on the MOA and OGLE images (both these projects regularly
   monitor the Bulge for lensing events and we take our triggers from the analysis
   of their data). Web-sites for the projects http://sirius.astrouw.edu.pl/~ogle/ or
   http://bulge.astro.princeton.edu/~ogle/ and http://www.phys.canterbury.ac.nz/moa/
   One of the possible triggers comes from the MOA project that operates in New Zeeland.
   Due to the time differences and how that project operates we can get to know about
   very interesting, quickly rising, targets as late as 5-6pm local Paranal time. We
   understand that the normal requirement for ToO observations to be carried out the
   same night as the trigger goes in is that the trigger reaches Paranal beofer 6pm
   local time. However, for Period 82 on the direct question to the USD we got the
   reply that the ToO would still be executed if we triggered no later than 7 pm. We
   thus will assume that we can trigger until 7pm Please let us know if there are issues
   with this.

ToO Activators List

• List of Activatorrs (in alphabetic order)
  Daniel Aden daniela@astro.lu.se
  Martin Asplund asplund@MPA-Garching.MPG.DE
  Thomas Bensby tbensby@eso.org
  Sofia Feltzing sofia@astro.lu.se
  Jennifer Johnson jaj@astronomy.ohio.state.edu
  Sara Lucatello sara.lucatello@oapd.inaf.it
  Jorge Melendez jorge@astro.up.pt
  Jennifer Simmer jennifer@astro.lu.se

Do all your OBs comply with the instrument-specific requirements listed
 on the instrument-specific Phase 2 web page ?

• YES

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 specified the S/N ratio at given wavelength in the User Comments
 field of each OB?

• YES

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 need secondary guiding, are there suitable objects within 30 arcsec
 from your target ?

• N/A