README web version of /home/usg/OPS/MTS/readme_xml/readme_82047100

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 NGC 821 (aka CIG89), to study its dark matter
   content. The high-multiplexity offered by FORS2/MXU is fully exploited, with more
   than 100 candidate GCs targetted per mask (in addition to a few simultaneous stellar
   templates and plenty of sky slits defined by hand in empty areas -- PLEASE NOTE
   the latter have been removed from the finding charts for clarity).
  The highest resolution 1400V grism and full wv range will be used with 1" slits
   centered on the faint (V ~ 20 up to 24) point-like targets, using a single exposure
   of 2669 s per OB. Three identical 1-hr OBs per pointing will thus fill up the 6
   hours allocated. The "Northern" n821 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 through slit exposure of 1 min in I is neede 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 3 OBs for a given pointing (preferably the Northern one which includes
   more targets) must be acquired in order to obtain sufficient S/N 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

• WHT PFIP

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