README web version of /home/usg/OPS/MTS/readme_xml/readme_84067400

Principal Investigator Email Address

• marusa@physics.ucdavis.edu

Estimated Total Execution Time (hours, including overheads)

• 20

General Description

• We use 3 masks, and are splitting the observing time of 20 hours in three
   blocks, 6 OB's per mask. The three masks go with the corresponding files Mask1=mxu2.8,
   Mask2=mxu2.10, and Mask3=mxu2.11. Mask1 is the highest priority, Mask3 the lowest.
  
  Allignment stars. All our alignment stars are 17-18mag. If needed, please increase
   exp.time for acquisition.
  
  TARGETS:
  All of the highest priority targets were selected from the ACS image (also used
   to prepare finding charts). Some extra targets were added, selected from Magellan
   Image (all targets outside the FOV of the ACS image in the finding charts, labelled
   either @mips* or m*). However, these extra targets might not be perfectly aligned
   (accuracy of only 0.4" was achieved), so do not center masks on these images. They
   are bright and large sources (all cluster members).  
  
  Some of the slits will appear empty, i.e. there is no object visible from F606W
   image. These are the V and i-band dropouts that were selected from F850LP image.
   This image, however only covers a half of what F606W does, so we decided to use
   F606W. They are, however aligned to high accuracy.
  
  Most of the high-priority targets are very faint. The brightest targets for each
   mask that coincide with ACS field are
  MASK1 #24 and #32, followed by #8, #34, #10
  MASK2 #24 (not centered on the slit lengthwise - "lower" part of the slit - see
   ) #32 #16 (not centered-"upper" part on the slit - see Mask2_3b.jpg, slit on the
   brightest arc) #7 #40 (not centered - upper part of the slit - see Mask2_4.jpg -
   slit close to Star5)
  MASK3 #33 #27
  
  Most of these targets are also extended, and will not appear perfectly centered
   on the slit (see finding charts for examples).
  
  DITHERING: since our main priority is obtaining the redshifts, we use dithering
   for all three masks.

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• Constraint set: All OB should be set to Clear, seeing < 0.8, airmass
   < 1.5, lunar illumination < 0.2, moon angular distance > 60.

Time-Critical Aspects

• N/A

Special Execution Requirements

• N/A

Special Calibration Information

• Only standard calibration is required.

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

• HST/ACS

Pre-imaging sources not listed above

• Magellan Image for priority 0 targets (@mips* and m*) aligned to 0.4"
   accuracy

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

• N/A