AXIS Observing Run Report
   --------------------------

Dates		Oct 27, 28 2000
Instrument	WFC imaging at INT prime focus
Observers	Diana Worrall (U. Bristol) and Gyula Szokoly (AIP)

Filters		z(GUNN) i'(SDSS)  r'(SDSS)  Ha(narrowband)  g'(SDSS)   u(RGO)
Nominal exps    1200      1200     600        1200          600        1200
Nom Landolt exps  60        30      20         120           15         120


Observing conditions
	Both nights clear and dark.  On Oct 27th the humidity and seeing
	rose dramatically during first half of night, peaking soon after midnight and
        then improving towards dawn.  Seeing between 1 arcsec and 1.4 arcsec.
	On Oct 28th the humidity stayed low, but the air was very unstable and
	the seeing dreadful (3 to 5 arcsec for much of the night, when winds were
	southerly).

No time lost due to technical problems.

Targets Observed
-----------------
	  Name		Filters			Comments
Oct 27th
	S5_0014+813	z i r  	       High dec target. Airmass ~1.7, but not going
						to improve with time. (See summary.) 
        HD_108                  g      deteriorating seeing. g missing from earlier
						observations.
     *  EQ_Peg		    r   g u    u,g,r missing from earlier observations
     *  CL0016+16                 u    seeing ~1.5''. u missing from earlier observations.
     *  A399               r    g u    800s in g. Seeing ~1.4''. u,g,r missing from
						earlier observations.
    **  HD_33798       z i r Ha g u    seeing particularly good for Ha (sub-arcsec) and g.
					     Started slightly earlier than optimal
					     (airmass 1.5(z) - 1.2(u)) since bunch of
					     high-priority targets at end of night.
     *  Hawaii_167     z i r    g u    subarcsec seeing for z,i,r
    **  GL_182         z i r    g u    subarcsec seeing for i
    **  GRB001025          r           900s exposure to match WFS/WCF observation of
					     Simon Hodgkin during prev night.
					     New GRB observed by XMM in schedule change.
    **	Cl0939+472       i r    g	


Oct 28th
     +  PB5062	      z  i r    g      seeing deteriorated to several arcsec. g repeated.
				       z ~ 1.3''; i ~ 1.8''; r and g 3'' to 5''
     +  LBQS221          i             2400s.  seeing several arcsec. i and u were
						missing from earlier observations
     +	A2670                   g      2400s.  seeing still bad. g and u were missing from
						earlier observations
     +  NGC7770          i r    g      seeing improved to 2.5''!   r 1200s; g 1800s.
     *  HCG16              r    g      r 1800s; g 2400s  seeing ~4''.  r,g,u missing from
						earlier observations
        MBM12            i r           r 1800s; i 2400s
     *  geminga          i r    g      r 900s; i 2400s; g 900s. Seeing improved to ~1.6''
     *  0738+313         i r    g      r 900s; i 1500s
    **	Cl0939+472    z                
    **  GRB001025     z  i

** Priority A 
*  Priority B
+  Early-night target added to list for 2nd night 

   Unless otherwise noted the nominal exposure time was used

Calibrations
----------
  It takes good planning to fit in all the required sky flats.  The
automatic programme for calculating exposure times is not always
satisfactory, particularly when the light gradient is large. We found
that the best filter order for the flats is Halpha, u, g, r, z, i in
the evening (and the reverse in the morning).  For some flats, the
FITS file header 'name' string typed manually, e.g. 'sky flat u', has
the wrong filter by mistake, but there is a correct filter keyword
written by the system, and the observing log is correct.

 The exposures for standards given above seemed to be good. The g, r,
and i integration times are a little shorter than in the report for
Oct 7/8th, to reduce saturation.

Summary
--------
 Oct 27th was first good night after several during which the clouds
had risen and engulfed the telescope in fog.  We concentrated on
getting good coverage of the priority A targets, although the
gamma-ray burst field and Cl0939+472 were both only available
approaching twilight.  The lists provided had a shortage of low-airmass
targets for early in the night, and there was insufficient time
to correct this until night 2.  The observations completed filter
coverage of HD_108 (missing u but at b=1.25), EQ_Peg, 
CL0016+16, A399, HD_33798, Hawaii_167, and GL_182.

 Oct 28th was a great disappointment -- despite being cloud-free the
air was unstable and the seeing mostly several arcsec.  We increased
integration times (but not beyond 2400s), used a restricted set
of filters (no u-band), and gave high priority to critical
missing filters from earlier runs as long as they weren't u.

 Data were deposited by ftp to ifca, starting during the night and
completing during the following day.  Transfer time and data
acquisition time are comparable for a night's observing.