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INSTRUMENT SETUP
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CONDITIONS:
 ANY   

CCD:
 FULL 13.7'x13.7' 

READOUT:
 QUAD   


GAIN INDEX:
 3: Read Noise ~ 3.5 ADU = 3.5 e-

FILTER SET:
 ugriz        

CALIBRATION FRAMES:
 BIAS       -    11
 DOME FLAT  g    11  ~20000 counts
 DOME FLAT  r    11  ~20000 counts
 DOME FLAT  i    11  ~20000 counts
 DOME FLAT  z    11  ~20000 counts

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NOTES FOR TARGET FIELDS
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I have two targets that are undergoing eclipses on May 03/04.

Please observe the target, J101445, continuously from the start of the
night until 04:45 UT.

Please observe J150057 from 05:00UT until morning twilight.

Please defocus the telescope so that the FWHM of the images are
approximately 2.0-2.5 arcsec.

The target stars are bright and short exposures will probably be required 
so as not to saturate the target.

Please determine the best exposure times in each filter by observing
the star once until the peak counts reach approximately 30000 ADU.
Exposure times of 10-30s in the four different SDSS griz filters will
be typical. If exposures take less than 7 seconds, it will be
necessary to defocus the telescope more than the requested 2.5 arcsec
in order not saturate the target star.

Once the exposure times are chosen for each filter, please keep those
fixed all the observations cycling through the SDSS griz filters for
the duration of the observations.

Please use the full CCD, so that many reference stars are also visible
in the FOV.  Please use the Quad amplifier mode to reduce the readout
time to 0.8min and move the target star off the center of the quad
readout frame.

Observe continuously while cycling through the four filters SDSS griz.

Please keep target star on the same exact pixel position for the
duration of the observations.  Realistically, we are usually able to
keep the star centered on the same pixel position within +- 5 pixels.

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NOTES FOR CALIBRATION FIELDS 
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NO Standard star fields are required

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OBSERVING SEQUENCE
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TARGET         J101445
PRIORITY       1
COORDINATES    10 14 45.10 -07 13 33.5   (J2000)
FINDER CHART   http://vpac00.phy.vanderbilt.edu/~hebbl/findingcharts/0.9m/12A/J101445.png
AIRMASS        (Airmass =  1.0-2.0)
FILTER(S)      griz
INTEGRATION(S) Exposure times set to get approx 30000 peak cts in target
                in each of the filters.  B=9.7, V=9.3, R=8.8, I~8.6
TOTAL TIME     Start of the night  until 04:45 UT. Each griz cycles will take ~5 min 
NOTES          Move the target off the center of the quad readout frame
               Defocus the telescope to FWHM approximately 2.0-2.5
                arcsec.  If the exposures take less than 7
                seconds, defocus the telescope further.
               Please keep the target on the same pixels for the
                entire time.
               Please observe this target continuously from the start
               of the night until 04:45 UT.  


TARGET         J150057
PRIORITY       1
COORDINATES    15 00 57.38 -33 26 20.7 (J2000)
FINDER CHART  
http://vpac00.phy.vanderbilt.edu/~hebbl/findingcharts/0.9m/12A/J150057.png
AIRMASS        (Airmass =  1.0-2.0)
FILTER(S)      griz
INTEGRATION(S) Exposure times set to get approx 30000 peak cts in target
                in each of the filters.  B=12.6, V=12.6, R=11.8, I=11.0
TOTAL TIME     05:00UT to morning twilight. Each griz cycles will take ~5 min 
NOTES          Move the target off the center of the quad readout frame
               Defocus the telescope to FWHM approximately 2.0-2.5
                arcsec.  If the exposures take less than 7
                seconds, defocus the telescope further.
               Please keep the target on the same pixels for the
                entire time.
               Please observe this target continuously from 05:00 UT
               until morning twilight.