README web version of /home/usg/OPS/MTS/readme_xml/readme_77500500

Principal Investigator Email Address

• gianluca@mporzio.astro.it

Estimated Total Execution Time (hours, including overheads)

• 3hr

General Description

• This program deals with the discovery and monitoring of the variable IR
  counterpart of the magnetar candidate SGR1900+14.  The run is devided into two epochs,
   each one being 1.5hr long. The OBs of the first epoch (*1stepoch*) have to be carried
   out as soon as the sky costraints will be met. 
  
  
  The second epoch OBs (*2ndepoch*) have to be executed after 1-2 months apart from
   the 1st one.
  
  
  Bright Sources
  --------------
   
   OBs                         IR magnitudes
                                within S27
  --------------------------------------------
  SGR1900*                    H = 7   Ref1

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Seeing better than 0.8 arcsec is a MUST !!!

Time-Critical Aspects

• The first 2 OBs (*1stepoch*) have to be carried out as soon as possible.
  
  The second 2 OBs (*2ndepoch*) have to be carried out after 1-2 months.

Special Execution Requirements

• the target has been already observed by NACO on 31st March 2006. The astronomer
   on duty had a number of problems due to two bright objects a 10 arcsec from the
   target. We modified the OBs following the successful strategy of the astronomer
   on duty. Below is his original night log
  
  -- There was no flux on the VIS WFS to close the loop. Hence, we switched to the
   IR WFS (mode 2-1) using dichro N20C80. Then, a high flux level was obtained, and
   we could close the loop with very good and stable correction (SR around 50%).
        
        Furhtermore, to avoid strong artefacts through the high saturation of the
   two extremely bright stars at the very left side of the detector, we moved these
   stars completely out of the FOV. Hence, the SGR is not centered anymore, but shifted
   to the left. To avoid that the SGR is shifted close to the border of the FOV. And
   to avoid that one of the bright stars enters the FOV, the jitter width was adjusted
   from 7'' to 3''. The modified setup should ensure that the science goals can be
   achieved. Note that despite all this improvements still two strong ghosts (from
   the two extremely bright stars) are visible a bit south of the SGR.......  ---
  
  
  NOTE THAT THE MINIMUM JITTERING WIDTH ACCEPTED BY P2PP IS 4 ARCSEC. IF NEEDED WE
   ASK TO MODIFY THE OB JITTER FROM 4 TO 3 ARCSEC . 
  
  
  FINALLY, WE REQUEST TO DOWNLOAD THE SCIENTIFIC AND CALIBRATION FILES THROGH THE
   FTP SERVER IN PARANAL AT THE END OF THE NIGHTS DURING WHICH OBS ARE EXECUTED.

Special Calibration Information

• NONE

ToO Information

• N/A

ToO Activators List

• N/A

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