Overview

• ‘Nod and shuffle’ observational technique

  • Superior sky-subtraction at faint (R=24-26) magnitudes
  • Greatly increased multiplex gain per observation

• Demonstration of the basic technique at the AAO

  • We’ve done it, and it works - “The LDSS++ Project”
  • New modes we’ve recently tried (i.e. last week)

• How this can be used for just about any spectrograph

  • Example - 2dF experiment

• Case studies of possible microslit surveys

  • High-z LSS, ultra-deep redshifts, emission line searches, etc.

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