README web version of /home/usg/OPS/MTS/readme_xml/readme_80047800

Principal Investigator Email Address

• gilles.bergond@gmail.com

Estimated Total Execution Time (hours, including overheads)

• 6.0

General Description

• We aim at determining the radial velocities of globular clusters (GCs)
   around the isolated
  early-type galaxy cig89 (aka NGC 821), to study its dark matter content. The high-multiplexity
  offered by FORS2/MXU is fully exploited, with more than 60 candidate GCs targetted
   per mask
  (in addition to simultaneous stellar templates and plenty of sky slits defined by
   hand in 
  empty areas).
  The highest resolution 1400V grism and full wv range will be used with 1" square
   slits 
  centered on the faint (V ~ 20 up to 24) point-like targets, using twice (to limit
   the impact 
  of cosmics) exposures of 1314 s per OB.
  Three identical 1-hr OB per pointing therefore fill up the 6 hours allocated. The
   "Southern" cig89 mask includes about 10 more candidate GCs, so it should be considered
   as prioritary.
  The targets have been selected from deep 4.2-m WHT prime focus camera BVR images
   and should have accurate astrometry, to be checked with the 6 reference stars of
   mag. V ~ 16-20 (so 5 s 
  exp. in I are fine to get central S/N ~> 30 w/o saturation) selected per field.
   An addtn'l though-slit exposure of 1 min in I is needed to see the faintest targets
   (S/N ~ 5 for V = 24)
  and, if possible, should be kept for further scientific use (getting a 4th color
   for the GCs).

Waiver Requests

• No Waiver Request was submitted

Critical Observing Condition Constraints

• None

Time-Critical Aspects

• None

Special Execution Requirements

• All the 3 OBs for a given pointing (preferably the Southern one which
   includes more targets)
  must be acquired in order to obtain sufficient S/N spectra for the faintest targets,
   most 
  of them having V ~ 22-24.

Special Calibration Information

• ---(Empty)---

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 ?

• 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