README web version of /home/usg/OPS/MTS/readme_xml/readme_80041100

Principal Investigator Email Address

• jsilverman@mpe.mpg.de

Estimated Total Execution Time (hours, including overheads)

• 57:00

General Description

• This OB is designed to acquire pre-imaging used to design masks for MOS
   observations with VIMOS
  using the LRblue grism in P80.
  
  We request that two exposures are taken with the R filter: one short (5 minute integration)
   and one long exposure (15 minute integration).  Two exposures will be taken with
   B-band filter with an integration time of 10 minutes each with one of the exposures
   offset by 10" to the south and 10" to the east.  This enables
  us to combine B-band images while removing artifacts due to cosmic rays and bad
   pixels. 
  
  The short (5 minute exposure) R band image will be used for transforming our user-supplied
   input catalog into the astrometric system of VIMOS. The deep R (15 minute exposures)
   and B (10+10 minutes) band images will enable us to identify faint optical counterparts
   to X-ray sources that are the science targets of our program.

Waiver Requests

• A waiver submitted on July 27, 2007 was approved on July 31st, 2007 to
   acquire a B-band image in addition to the required R-band pre-images.

Critical Observing Condition Constraints

• The pre-images are taken in dark time preferably with the moon down. We
   have set the lunar illumination
  to be less than 0.4 and angular distance to the moon to be greater than 60 degrees.
   These are relaxed
  a bit from our desired conditions in order to get these observations completed.
  
  We do request, if feasible and no delay in acquiring our preimages occurs, that
   the B-band exposure
  be taken with the lunar illumination less then 0.30.
  
  For each observation, the seeing must be less than 1.0" and the airmass less than
   1.3.

Time-Critical Aspects

• None.

Special Execution Requirements

• None.

Special Calibration Information

• None.

ToO Information

• ---(Empty)---

ToO Activators List

• ---(Empty)---

Is this a Pre-imaging run ?

• true

Pre-imaging Requirements

• This OB is designed for a pre-imaging run.  The only non-standard requests
   is the acquisition of
  a B band image as described in the General Description and Waiver Requests sections
   of this README
  file.

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 ?

• YES

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

Did you specify suitable guide stars for all your OBs using Guidecam
 ?

• YES

Did you check that the chosen guide stars are suitable for all the offset
 positions and that they do not produce unacceptable vignetting of the field of view
 ?

• YES