This directory contains the pre-impact observations of comet Tempel 1
obtained on 2005 May 30 UT. The observations were made with the High Resolution
Echelle Spectrometer (HIRES) at the W. M. Keck Observatory (WMKO). Three 1200s 
exposures of the comet nucleus were obtained along with a 600s exposure of 
the standard star Feige 67. The log of the observations is in "log.txt".

The instrumental setup for these observations, which were made with the HIRES
blue cross disperser, is:
DECKNAME: C1  (7" x 0.861" slit)
XDANGLE:  0.982
ECHANGL:  0.00
BINNING:  2x1 (binned by 2 in the spatial direction)
CCDGAIN:  low

The spectra cover approximately 3000A - 5900A.

No filters were used for the objects (Tempel 1 and Feige 67), but a UG5 was 
used for the flats and NG3 was used for the arcs (Thorium-Argon).  

In addtion to the data FITS files, the following supplementary files are also
provided:
  K1_Nightlog_30_May_05_(UT).txt  - Night log from the night's observing assistant
  tempel1_20050530_cam.fits  - Guider image during one of the comet exposures
  tempel1_20050530.jpg  - A screen snapshot image of the guider camera display

These data are made available through the Keck Observatory Archive (KOA), and 
can be downloaded from:

  http://msc.caltech.edu/deepimpact

For further information about KOA, HIRES and WMKO, visit:

  http://msc.caltech.edu/koa
    or 
  http://www2.keck.hawaii.edu/realpublic/koa/public/koa.php.

The Keck Observatory Archive has been made possible by funding provided by 
the National Aeronautics and Space Administration to Caltech and the 
W. M. Keck Observatory. The W. M. Keck Observatory Director Fred Chaffee is 
thanked for donating his director's time for the HIRES observations of Tempel 1 
and for providing the data to the public.

Many thanks to Dr. Mike Bolte for making part of his observing time available
for these pre-impact observations.