README web version of /home/usg/OPS/MTS/readme_xml/readme_79042800

Principal Investigator Email Address

• wgieren@astro-udec.cl

Estimated Total Execution Time (hours, including overheads)

• 9:57:28

General Description

• We want to observe one ISAAC  field through K_s and J_s filters in the
   galaxy Cen A. To derive mean K and J magnitudes  of Cepheid variables based on our
   observations we need two exposures, taken at significantly different phases of the
   variables.  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 observation). To keep our K_s OBs
   reasonably short, each of  them was divided into three parts (e.g. CENA-N1-K1, CENA-N1-K2
   and CENA-N1-K3, etc ). Please execute these three OBs together with the  corresponding
   J band OB of this particular field.  We should therefore have three K_s OBs, plus
   the JK OB for a given field, all obtained together on the same night. Such a sequence
   (e.g. CENA-N1-K1, CENA-N1-JK, CENA-N1-K2 and CENA-N1-K3) will result in a total
   observing time of about 4 hours, and should be repeated five or more nights later
   (e.g. CENA-N2-* OBs). One full sequence of observations should be executed under
   photometric conditions and together with a set of selected UKIRT standard stars.

Waiver Requests

• A weiver allowing a consequitive execution of several OBs  has been granted
  to our project.

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 prepared 7  standard star OBs ( standards are from the UKIRT list
   (Hawarden et al. 2001) to calibrate our observations. For one  of our Cen A field
   we need a full set of acompanying standard stars observations (e.g. the seven standard
   star OBs + hoppefully more standards observed as the part of the calibration plan
   on the bright sky) conducted on the same night. The standard star
  observations will consume a total time of bit more than one hour.
  
  The second set of OBs (CENA-N2-xx) should also be executed in a consecutive sequence
   and must be executed at least 5 days after the first set of OBs (CENA-N1-xx).

Special Execution Requirements

• Since our Cepheids have typical periods of about 10-50 days the second
   set of the J,K_s images for  our field should be obtained at least 5 days after
   completing the first set of observations.

Special Calibration Information

• Several UKIRT standards were selected to calibrate our data. Please execute
   them together
  with one set of observations of our Cen A field. 
  
  Please make sure that standards have counts < 10000 (e.g. are in the linear range
   of the detector).

ToO Information

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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