README web version of /home/usg/OPS/MTS/readme_xml/readme_80010500

Principal Investigator Email Address

• danziger@oats.inaf.it

Estimated Total Execution Time (hours, including overheads)

• 25h

General Description

• Imaging of supernova SN 1987A. 
  
  Imaging should be straightforward. However, for posterior deconvolution and
  estimates of limiting magnitudes, a close reference star (2MASSJ05355628-6917507)
   will be imaged too
  EACH TIME (PRIOR OR AFTER) an OB is executed for SN1987A in the PAH filter. 
  
  We would like to get OB302246, OB302248 and OB288617 executed consecutively during
   the same night, if possible. Would this be impossible, OB 288617 should be executed
   without accompanying PSF. 
  NO PSF measurements are required for the Q2 filter. 
  
  Finding charts are provided from the visible to the near-IR light only, as no usable
   10 micron
  image is available. Although they should not be really needed for imaging for which
   a blind pointing
  should be accurate enough, they can be used for all the OBs.
   - FC1: 3'x3' V band image with a few identifications and corresponding coordinates.
    
   - FC3: 4.5'x4.4' I band image of the field comprising the three stars of interest
  (SN, EQJ, REF)
   - FC4: 4.4'x4.4' K band showing the 2 MACHOS objects in the field which will be
   imaged 
  (REF and EQJ), while the supernova complex is NOT seen at this wavelength. 
   - FC5: 45"x45" HST image showing the close environment of the supernova. This image
   comes
  from the HST Gallery and has the spatial resolution necessary for separating the
  two brighest companions (stars S2, S3) and the equatorial ring which should be resolved
   with
  VISIR.  
  
  PLEASE NOTE that due to the faintness of the object it is very important that the
   four
  beams for both SN1987A (and 2MASSJ0535) be usable on the chip. 
  
  Good luck and thanks a lot in advance!

Waiver Requests

• The IR signal from the supernova is very weak and we might not see it
   (indeed, we didn't see
  it during our observations in period 78). On an other hand, the field will be absolutely
  empty and thus recentering/merging of separate frames would be venturous. We need
   thus
  to get a minimum of 1 hour continued integration. That translates into 1h39min for
   the imaging OB. 
  We therefore requested that these long OBs be allowed, which was accepted.

Critical Observing Condition Constraints

• As usual thermal IR observations require dry AND STABLE conditions.
  Further, due to the high spatial resolution required for our program,
  and the very low flux level to be detected, we DO need to be 
  diffraction-limited at 10 micron and we request the 
  HIGHEST QUALITY ATMOSPHERIC CONDITIONS (= BETTER THAN EXCELLENT).
  We stress that observing under less than excellent conditions would
  be a waste of telescope time.

Time-Critical Aspects

• No time-critical aspects

Special Execution Requirements

• Imaging should be straightforward. 
  The PSF star should be imaged each time an OB for SN1987A through the PAH filter
   is executed
  (prior or after, it doesn't matter for our purpose).

Special Calibration Information

• No special photometric calibrations are requested. Note however taht,
   as stressed in the "Special Execution Requirements", that the PSF star EQJ0535 must
   be imaged for each OB of SN1987A through the PAH filter.

ToO Information

• N/A

ToO Activators List

• N/A

Is this a Pre-imaging run ?

• false

Pre-imaging Requirements

• N/A

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

If the provided finding chart is at a different wavelength than the observations,
 did you clearly describe in the README file how to identify the target?

• YES

Did you specify a guide star brighter than V=12mag within a field of
 r=5arcmin around the science target?

• N/A