CCD:
 QUAR 6'x6'arcmin (XSTART=513, YSTART=513, same as CTIOPI)

READOUT:
 ONE AMP 

GAIN INDEX:		
 4: Read Noise ~ 5.0 

FILTER SET:
UBVRI 



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NOTES FOR OBSERVING
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The goal is to get a simple time series photometry of an eclipse by U
Sco (a recurrent nova at I~18 at minimum) so as to get an exact time
of minimum.  [Many such eclipse timings are being accumulated with a
goal of looking for the period change caused by U Sco's 1999
eruption.] The times *must* start at the given UT time listed below.
Take 300 second integrations in the I-band, and keep repeating for the
entire four hour period.

CIVIL DATE        UT DATE(start)    UT TIME START         JD mid-eclipse
___________       ______________    _____________         ______________
29-Jul             30-Jul            1:10 (21:10 Local)    2454677.631


Take the observations through any conditions, as I'll be doing 
differential photometry with respect to nearby stars.  Even a sporatic 
light curve through holes in clouds can return an eclipse time of some 
use.

The finder chart for U Sco can be found from the Downes & Shara catalog at 
http://archive.stsci.edu/prepds/cvcat/Forms/varcat_query.html
Enter the name of the target (U Sco) in the box at upper left labelled 
"GCVS Name", click the "Submit" box on the upper right, then click on the 
name on the left.  In the target list below, I give the full link for the 
finder chart without any further clicking.

At the start of the four hour period, move to U Sco, take a focus (if 
needed), check the center (so U Sco does not fall on a bad column or join 
line), then start the sequence with the 'MORE' command.  And stop when the 
four hours is up.  This program should be very easy.

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NOTES FOR CALIBRATION FIELDS
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Please take a set of bias and dome flats in I.

No calibration, the photometry will be all differential with respect to 
nearby stars (of known magnitude).

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DETAILS ON TARGET (J2000.0)
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TARGET         U Sco
PRIORITY       1
COORDINATES    16 22 30.7   -17 52 42
FINDER CHART   http://archive.stsci.edu/prepds/cvcat/query_processor.cgi?setup_file=varcat.setup.cgi&query_decision=single_record&uid=7729
AIRMASS        given times will give good airmass
FILTER(S)      I
INTEGRATION(S) 300 seconds (do series continuously for 4 hours)
TOTAL TIME     4.0 hours from the start time given above
NOTES          Do under any conditions, even only occassional cloud holes