DATE: 3-4 August 2000

TELESCOPE: WHT

INSTRUMENT: ISIS double spectrograph
      Blue arm: R300B l/mm grating, EEV12 detector, covering 3000A
      Red arm; R150R l/mm grating, TEK4 detector, covering 3000A
      Dichroic at 5700
      Red blocking filter for red arm at 4950A
      Slit width was 1"

OBSERVERS: Xavier Barcons (IFCA) &  Julian Osborne (LU)

TECHNICAL REPORT:  No techincal problems to report this time.  

WEATHER: Dust (which settled down the seeing, especially in the second
night with <1") and high clouds, especially on the first hours of the first
night. In spite of this, we observed the full two nights.

REPORT

The run went very well.  Target acquisition was done very efficiently
and no time was lost. Thanks to the contribution of several people
we had target lists of candidate counterparts, and nearby bright
stars for target acquisition for the following fields:

  * Mkn205
  * G2.05-09  
  * RT Ser 
  * G133 

For the extragalactic fields (Mkn205 & G133), most X-ray sources had
in many cases a unique counterpart. For the galactic fields,
especially G21, there were various candidates and these were sorted
out by Christian Motch in view of the previous fibre spectroscopy. For
virtually all the extragalactic fields, the ISIS exposure time was
1800s (except where the target was unusually bright).  For the
galactic fields, we tried to do our best in adjusting exposure time to
magnitude.  We repeated some sources on the second night, in view of
the first night's data. 

We concentrated on Mkn205, G21 and G133 fields, given their
distribution on the sky.