README web version of /home/usg/OPS/MTS/readme_xml/readme_77043100

Principal Investigator Email Address

• pietrzyn@astrouw.edu.pl

Estimated Total Execution Time (hours, including overheads)

• 18:59:52

General Description

• We want to observe 2 ISAAC  fields through K_s and J filters in the galaxy
   M83. To derive mean K_s and J magnitudes  of Cepheid variables based on our observations
   we need two exposures, taken at significantly different phases of the variables,
   for each filter and for each field.
  
  In order to reach good S/N ratio we need long exposure times in the K_s filter
  (of about 1 hour of intergration per field). To keep our K_s OBs reasonably short,
  each of  them was divided into three parts (e.g. M83-FI-K1-N1, M83-FI-K2-N1 and
  M83-K3-N1, etc ). Please execute these three OBs one after another on the same
  night and follow them immediately with the  corresponding J band OB of this
  particular field. For any given field in M83, we should therefore have three
  K_s OBs, plus the JK OB for this field, all obtained together on the same night.
  Such a sequence will result in a total observing time of about 4 hours, and should
  be repeated ten or more nights later for this same  field (a correspondin weiver
   has been granted).
  Below we list the sequences of OBs which should be executed on 4 different nights:
  
  night1 (photometric conditions):
  M83-FII-K1-N1, M83-FII-K2-N1, M83-FII-K3-N1, M83-FII-JK-N1 + 6 standard star OBs
   STD-FS*-N1
  
  night2 (photometric conditions):
  M83-FI-K1-N1, M83-FI-K2-N1, M83-FI-K3-N1, M83-FI-JK-N1 + 6 standard star OBs STD-FS*-N2
  
  night3 (clear sky):
  M83-FI-K1-N2, M83-FI-K2-N2, M83-FI-K3-N2, M83-FI-JK-N2
  
  night4 (clear sky):
  M83-FII-K1-N2, M83-FII-K2-N2, M83-FII-K3-N2, M83-FII-JK-N2
  
  Of course we take into account that the specified weather conditions can be guaranted
   only during the fist hour of execution of a given sequence of OBs. 
  
  The finding charts for M83 fields were prepared based on infrared DSS plates while
   those for standard strs based on DSS red plates.

Waiver Requests

• A weiver allowing a consequitive execution of several OBs which has been
   granted 
  to our project (077.D-0431A.01).

Critical Observing Condition Constraints

• Since doing precision IR photometry in a galaxy located at about 4 MPs
   is a challange due to blending effect, the excellent seeing is the most important
   limiting factor. We have specified the seeing limit of 0.6 arcsec, but observing
   at better seeing conditions would  significantly help to obtain better results from
   this project.

Time-Critical Aspects

• We have selected 6 different standard stars from the UKIRT list (Hawarden
   et al. 2001)
  to calibrate our observations. For each of our M83 fields we need a full set of
   acompanying standard stars observations (e.g. the six standard star OBs + hoppefully
   more standards observed as the part of the calibration plan on the bright sky) conducted
   on the same night.  
  We will observe each of the two M83 fields on two different nights (see above),
   but it will be sufficient to observe it together with standards on only one of these
   two nights. The standard star
  observations will consume a total time of bit more than two hours.

Special Execution Requirements

• Since our Cepheids have typical periods of about 20-80 days the second
   set of the J,K_s images for a given field should be obtained at least 10 days after
   completing the first set of observations for this particular field.

Special Calibration Information

• Several UKIRT standards were selected to calibrate our data. Please execute
   them together 
  with our M83 fields.

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 ?

• 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 submitted OBs for standard stars, did you use the provided StandardStar
 templates ?

• YES

If you are using a specific offset pattern or position angle, did you
 check carefully the definition in the manual ?

• YES

If you are doing spectroscopy, did you draw the slit on the Finding Charts
 ?

• N/A

Did you enter the magnitude of the brightest star in the field-of-view
 in the 'Instrument Comments' field of each OB ?

• YES

If you use the MoveToPixel acquisition, have you given clear instructions
 on the FC and in the OB comment section as to how the field should be centered ?

• N/A