GMOS SV program 71

	Status: in preparation Data link: not yet available Assessment: not yet available

Title:	Radial velocities of stars in dSph
Modes:	Imaging (for mask preparation) Multi-object spectroscopy
Additional instrument verification:	Data reduction pipeline for imaging data and MOS data; mask preparation software; use of tilted slits.
Telescope verification:	Acquisition and guiding with GMOS for tested modes. Stability of guiding over long periods of time and large hour angles.
Proposed observing sequence:	Imaging: 4-6 dithered observations in order to cover the gaps between the CCDs and clean the combined images for bad pixels and cosmic-ray-events. MOS: Multiple 30-60 min exposures, no dithering.
OT program file:	Not yet available
Science background:	MOS spectroscopy of nearby GC/dwarf to get abundances from Ca triplet. Spectrosocopy of point sources in crowded regions. Some radial velocity information, but the resolution would not be as high as requested by GMOS SV program 57.
Target(s):
	Object	RA (J2000)	Dec (J2000)

Observing condition constraints:	image quality: 80%-ile sky transparency (clouds): 50%-ile sky transparency (water vapour): Any sky background: 80%-ile max air mass: 1.5
Instrument configuration:	Imaging: r', CCD binned 2x2 MOS: R831, 0.5" slitlets, CCD unbinned
Observing time requirements:	Imaging: 4x3 min MOS: 2-3 hours
SV team member(s) responsible for assessment:	Bryan Miller

Last update October 12, 2001; Inger Jørgensen