README web version of /home/usg/OPS/MTS/readme_xml/readme_77066607

Principal Investigator Email Address

• dante@astro.puc.cl

Estimated Total Execution Time (hours, including overheads)

• 5 hours

General Description

• R-band Photometric observations of a planetary transit. Warning, the HR
   collimator is used.  We have selected 2 possible observing dates: April 27/28 and
   May 20/21 2008. We strongly prefer the april sequence as the target airmass will
   be lower.
  Time intervals have been set in the OBs (see also Time critical aspects). The duration
   of the full sequence of OB is 5 hours.
  
  The LADC should be resetted from time to time as long as sec(z) is lower the 1.5.
   For this purpose, the OB has been divided in several science template for allowing
   the observations to be paused.
  
  The support astronomer shoud check the counts obtained for the target (see finding
   charts) and adjust the exposure times/number of exposures if necessary (see special
   execution requirements).

Waiver Requests

• Waiver 177.C-0666H.001.wav: we have requested the authorization for executing
   OBs (or sequence of OBs) longer than 1 hour. This waiver was approved on April 11th
   2008.

Critical Observing Condition Constraints

• At the beginning of the sequence, the following constraints must be matched:
    seeing<2.0'' clear skies (thin clouds are OK if at low altitude).
  If the conditions get clearly out of constraints during the first hour, please stop
   the sequence. If conditions degrade after the 1st hour, please continue the sequence.

Time-Critical Aspects

• The planetary transits we plan to measure can be observed during the following
   nights:  April  27/28 2008 (1st choice) or May 20/21 2008 (2nd choice).
  
  -UT intervals are the following (also specified in the OB)  
  2008-04-27T23:30:00 -> 2008-04-28T04:30:00
  2008-05-21T00:15:00 -> 2008-05-21T05:15:00
  
  
  -Predicted Transit times
  
  Night        1st contact       Mid-transit       4th contact
  -----        -----------       -----------       -----------
  April 27/28  2008-04-28T00:41  2008-04-28T03:04  2008-04-28T05:23
  May   20/21  2008-05-21T01:13  2008-05-21T03:32  2008-05-21T05:51
  
  In both cases, our observations will not cover the transit egress but this is fine.
   More than half of the transit will be covered and the transit signal is symetric
   around the mid-transit time.

Special Execution Requirements

• Exposure times have been set to 6 seconds in all the observing templates.
   This value value should be fine for clear skies and a seeing between 0.8 and 1 arcsec.
   The support astronomer should check the counts of our target. Two finding charts
   have been attached (1 DSS image + 1 higher resolution OGLE image: the target is
   clearly marked on both images). Ideally, we would like to obtain a flux at peak
   of 30000 ADUs (background+target). Exposure times have to be adapted to the conditions.
   In clear conditions, the following exposure times have to be used:
  
  seeing < 0.6''            exptime =  3 sec
  0.6'' <= seeing <= 0.8''  exptime =  4 sec
  0.8'' <= seeing <= 1.0''  exptime =  6 sec
  1.0'' <= seeing <= 1.2''  exptime = 10 sec
  1.2'' <= seeing <= 1.5''  exptime = 15 sec
  seeing > 1.5''            exptime = 25 sec
  
  The first science template only contains 5 exposures and has to be used for checking
   the counts and the seeing. If the exposure times need to be modified, then it will
   necessary to adjust the number of templates/exposures of this sequence. The support
   astronomer should make sure that the requested time intervals are fully covered.
  
  In any case:  
  -avoid to change the exposure time too often: do not modify exptime if conditions
   change but the peak flux remains between 15000 and 30000 ADUs
  -min exposure time: 2 sec 
  -max exposure time: 90 sec (in case of bad seeing + thin clouds)

Special Calibration Information

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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 ?

• 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 prepared your finding charts with tools other than FIMS,
 do they comply with the specifications on the FORS1 Phase 2 web page ?

• YES