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NIRI Update

12 September 2002

The NIRI maintenance work has now been completed and NIRI has been tested cold in the lab. All the mechanisms are moving and the new bushings are working well. In addition to the preventative maintenance, we also installed the new Shack-Hartmann roof prism in the on-instrument wavefront sensor optics. We look forward to using the 2x2 spot pattern to correct for fast tip-tilt and focus in the coming months. The NIRI science-channel camera optics were realigned and the pupil alignment is nearly identical to that before the shutdown.

NIRI Update

24 September 2002

NIRI Update: guiding issues for NIRI during 2003A

31 Jan 2003

NIRI has been working well recently. NIRI queue observing is scheduled to start 13 Feb 2003. Phase II proposals should be sent to the national project offices for checking as soon as possible (see the 2003A special instructions for deadlines and submission details).

Peripheral wavefront sensor #1 (PWFS1) had a mechanical problem recently and was removed from the telescope for repairs and optical adjustment. Phase II proposals should therefore not request PWFS1 until further notice.

NIRI Update: results from semester 2003A

19 Jun 2003

We recently completed the last scheduled NIRI observing block for semester 2003A. The weather cooperated and we consistently achieved 0.3 arcsec images using PWFS2. We were able to complete about 90% of the queue Band 1 observations.

Phase II Checklist


  • Are observations defined for all targets and for all grating settings (if more than one requested)?

Phase I Checklist

Instrument configuration:

  • Is the appropriate order sorting filter for each desired spectral interval specified in the proposal instrument resource list? 
  • Does your choice of slit give appropriate spectral resolution and sensitivity?

Telescope peripheral wavefront sensors:

  • Have you specified one guide star of adequate brightness for the peripheral wavefront sensor?

Phoenix OT Details

After the queue for a given semester is consolidated, the PIs of approved proposals will be sent a "Phase II skeleton", which is imported in to the Observing Tool (OT) so that individual observations can be defined, by selecting each one at a time.

Phoenix OT layout