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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 Apr 11/12.  Please
observe the target, J094849, continuously from the start of the night
until 02:00 UT.  Please observe J103727 from 02:10UT 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.

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         J094849
PRIORITY       1
COORDINATES    09 48 49.45 -08 29 36.4   (J2000)
FINDER CHART   http://vpac00.phy.vanderbilt.edu/~hebbl/findingcharts/0.9m/12A/J094849.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=9.0, I~8.8
TOTAL TIME     Start of the night  until 02:00 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 observe this target continuously from the start
               of the night until 02:00 UT.  

TARGET         J103727
PRIORITY       1
COORDINATES    10 37 27.52 -45 21 48.3 (J2000)
FINDER CHART   http://vpac00.phy.vanderbilt.edu/~hebbl/findingcharts/0.9m/12A/J103727.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=12.9, V=12.7, R=12.6, I=11.5
TOTAL TIME     02:10UT 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 observe this target continuously from 02:10 UT
               until morning twilight.

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