CCD:
 FULL 13'x13'armin - 2x2 binning!

READOUT:
 QUAD

GAIN INDEX:
 1: Read Noise ~ 1.5 ADU = 5.5 e-

FILTER SET:
 Narrow Band  (3996/1042 and 656375-3)



-----------------------------------------------------------------------
NOTES FOR TARGET FIELDS
-----------------------------------------------------------------------

1. When first acquiring the comet, check that the background stars 
   have reasonable focus. Please do not spend more than 5 minutes 
   attempting to improve the focus; at higher airmass, the stars will not 
   be sharp! 

2. Check to make sure that the coordinates are correct; the comet is 
   moving rapidly, so the coordinates appropriate for the specific 
   UT time should be used (to the nearest quarter hour).  

3. Take 1 exposure (60 seconds) using the 3996/1042 filter, and confirm 
   that the comet (an extended, diffuse blob, perhaps with a bright core) 
   is present and near the middle of the frame. 

4. Adjust the pointing of the telescope only if the comet is near the edge 
   of the frame.

5. Take a series of 60-second exposures with the 3996/1042 filter for 
   a total of 20-25 minutes. The comet should appear to move about 
   2-4 arcminutes during this sequence.

6. Recenter the comet (use the coordinates from the ephemeris for the 
   current UT.

7. Take 1 exposure (60 seconds) using the 3996/1042 filter, and confirm 
   that the comet (an extended, diffuse blob, perhaps with a bright core) 
   is again near the middle of the frame. 

8. Change to the 656375-3 filter, and take a series of 60-second exposures 
   for a total of 20-25 minutes. In this filter, the comet will be fainter 
   (a nearly point-like object plus a faint, small extended fuzz).


-----------------------------------------------------------------------
NOTES FOR CALIBRATION FIELDS 
-----------------------------------------------------------------------

1. Biases should be obtained every night.

2. Flats (preferably twilight, dome if necessary) should be obtained 
   for both filters, at least every other night.

3. The standard star, HD 19712, should be imaged once in both filters, 
   before the comet observations, and after every comet set of 
   45-50 minutes. 
   The star is 7th magnitude, so fairly short exposures (1 second for 
   the 3996/1042 filter; 3 seconds for the 656375-3 filter) will 
   be needed to prevent saturation. 



-----------------------------------------------------------------------
OBSERVING SEQUENCE
-----------------------------------------------------------------------

TARGET          HD 19712 (standard star)
PRIORITY        2
COORDINATES     03 10 18.0   -01 41 41 (J2000)
FINDER CHART    
AIRMASS         whatever it is at just prior to the comet observations
FILTER(S)       3996/1042, 656375-3
INTEGRATION(S)  2s, 3s 
TOTAL TIME      2-4 minutes
NOTES           any conditions acceptable
 

TARGET          Comet 8P/Tuttle
PRIORITY        1
COORDINATES     See detailed ephemeris, using correct UT Date and Time
FINDER CHART    
AIRMASS         <3.0
FILTER(S)       3996/1042, 656375-3 (see target notes for detailed sequence)
INTEGRATION(S)  60s, 60s, (approximately 20 frames per filter; see notes)
TOTAL TIME      45-50 minutes
NOTES           any conditions acceptable


TARGET          HD 19712 (standard star)
PRIORITY        2
COORDINATES     03 10 18.0   -01 41 41 (J2000)
FINDER CHART    
AIRMASS         whatever it is at just after comet observations
FILTER(S)       3996/1042, 656375-3
INTEGRATION(S)  1s, 3s 
TOTAL TIME      2-4 minutes
NOTES           any conditions acceptable
 

TARGET          Comet 8P/Tuttle
PRIORITY        1
COORDINATES     See detailed ephemeris, using correct UT Date and Time
FINDER CHART    
AIRMASS         <3.0
FILTER(S)       3996/1042, 656375-3 (see target notes for detailed sequence)
INTEGRATION(S)  60s, 60s, (approximately 20 frames per filter; see notes)
TOTAL TIME      45-50 minutes
NOTES           any conditions acceptable


TARGET          HD 19712 (standard star)
PRIORITY        2
COORDINATES     03 10 18.0   -01 41 41 (J2000)
FINDER CHART    
AIRMASS         whatever it is at just after comet observations
FILTER(S)       3996/1042, 656375-3
INTEGRATION(S)  1s, 3s 
TOTAL TIME      2-4 minutes
NOTES           any conditions acceptable
 

TARGET          Comet 8P/Tuttle
PRIORITY        1
COORDINATES     See detailed ephemeris, using correct UT Date and Time
FINDER CHART    
AIRMASS         <3.0
FILTER(S)       3996/1042, 656375-3 (see target notes for detailed sequence)
INTEGRATION(S)  60s, 60s, (approximately 20 frames per filter; see notes)
TOTAL TIME      45-50 minutes
NOTES           any conditions acceptable


TARGET          HD 19712 (standard star)
PRIORITY        2
COORDINATES     03 10 18.0   -01 41 41 (J2000)
FINDER CHART    
AIRMASS         whatever it is at just after comet observations
FILTER(S)       3996/1042, 656375-3
INTEGRATION(S)  1s, 3s 
TOTAL TIME      2-4 minutes
NOTES           any conditions acceptable
 

TARGET          Comet 8P/Tuttle
PRIORITY        1
COORDINATES     See detailed ephemeris, using correct UT Date and Time
FINDER CHART    
AIRMASS         <3.0
FILTER(S)       3996/1042, 656375-3 (see target notes for detailed sequence)
INTEGRATION(S)  60s, 60s, (approximately 20 frames per filter; see notes)
TOTAL TIME      45-50 minutes
NOTES           any conditions acceptable


TARGET          HD 19712 (standard star)
PRIORITY        2
COORDINATES     03 10 18.0   -01 41 41 (J2000)
FINDER CHART    
AIRMASS         whatever it is at just after comet observations
FILTER(S)       3996/1042, 656375-3
INTEGRATION(S)  1s, 3s 
TOTAL TIME      2-4 minutes
NOTES           any conditions acceptable
 

Note: Repeat comet and standard star sets as many times as possible until 
either the comet reaches 3.0 airmasses or until the 1/2 night is over. 

   8P/Tuttle   Comet Topocentric Ephemeris for Cerro Tololo Observatory
   Cal. U.T. Date   J.E.D.       RA            DEC         Hourly   Com
                      24+             (2000.0)              Motion   Alt
   Yr  Mo Da Hr Mi             H  M   S     D     "      "      "    D
   2008  1 25  0 45 54490.532   2 38 26.37 -35 37 22.5   52.2 -162.0 69
   2008  1 25  1  0 54490.542   2 38 27.44 -35 38  3.0   52.4 -161.7 66
   2008  1 25  1 15 54490.553   2 38 28.52 -35 38 43.4   52.5 -161.5 63
   2008  1 25  1 30 54490.563   2 38 29.59 -35 39 23.7   52.6 -161.2 59
   2008  1 25  1 45 54490.574   2 38 30.67 -35 40  4.0   52.7 -161.0 56
   2008  1 25  2  0 54490.584   2 38 31.76 -35 40 44.2   52.9 -160.8 53
   2008  1 25  2 15 54490.595   2 38 32.84 -35 41 24.3   53.1 -160.6 50
   2008  1 25  2 30 54490.605   2 38 33.93 -35 42  4.5   53.3 -160.4 47
   2008  1 25  2 45 54490.615   2 38 35.03 -35 42 44.5   53.5 -160.2 44
   2008  1 25  3  0 54490.626   2 38 36.13 -35 43 24.5   53.7 -160.0 41
   2008  1 25  3 15 54490.636   2 38 37.23 -35 44  4.5   53.9 -159.8 38
   2008  1 25  3 30 54490.647   2 38 38.34 -35 44 44.4   54.1 -159.6 35
   2008  1 25  3 45 54490.657   2 38 39.46 -35 45 24.3   54.4 -159.4 32
   2008  1 25  4  0 54490.667   2 38 40.57 -35 46  4.1   54.6 -159.3 30
   2008  1 25  4 15 54490.678   2 38 41.70 -35 46 43.9   54.8 -159.1 27
   2008  1 25  4 30 54490.688   2 38 42.83 -35 47 23.7   55.1 -159.0 24
   2008  1 25  4 45 54490.699   2 38 43.96 -35 48  3.4   55.3 -158.9 21
   2008  1 25  5  0 54490.709   2 38 45.10 -35 48 43.1   55.6 -158.8 18
   2008  1 26  0 45 54491.532   2 40 15.51 -36 40 35.7   50.5 -152.3 68
   2008  1 26  1  0 54491.542   2 40 16.56 -36 41 13.7   50.6 -152.1 65
   2008  1 26  1 15 54491.553   2 40 17.61 -36 41 51.7   50.7 -151.8 62
   2008  1 26  1 30 54491.563   2 40 18.67 -36 42 29.6   50.9 -151.6 59
   2008  1 26  1 45 54491.574   2 40 19.73 -36 43  7.5   51.0 -151.4 56
   2008  1 26  2  0 54491.584   2 40 20.79 -36 43 45.3   51.2 -151.2 53
   2008  1 26  2 15 54491.595   2 40 21.86 -36 44 23.0   51.3 -151.0 50
   2008  1 26  2 30 54491.605   2 40 22.93 -36 45  0.8   51.5 -150.8 47
   2008  1 26  2 45 54491.615   2 40 24.00 -36 45 38.4   51.7 -150.6 44
   2008  1 26  3  0 54491.626   2 40 25.08 -36 46 16.0   51.9 -150.4 41
   2008  1 26  3 15 54491.636   2 40 26.16 -36 46 53.6   52.1 -150.2 38
   2008  1 26  3 30 54491.647   2 40 27.25 -36 47 31.1   52.3 -150.1 35
   2008  1 26  3 45 54491.657   2 40 28.34 -36 48  8.6   52.6 -149.9 32
   2008  1 26  4  0 54491.667   2 40 29.43 -36 48 46.1   52.8 -149.8 29
   2008  1 26  4 15 54491.678   2 40 30.54 -36 49 23.5   53.0 -149.6 27
   2008  1 26  4 30 54491.688   2 40 31.64 -36 50  0.9   53.3 -149.5 24
   2008  1 26  4 45 54491.699   2 40 32.76 -36 50 38.2   53.5 -149.4 21
   2008  1 26  5  0 54491.709   2 40 33.87 -36 51 15.6   53.8 -149.3 18
   2008  1 27  0 45 54492.532   2 42  2.49 -37 40  7.1   48.9 -143.4 67
   2008  1 27  1  0 54492.542   2 42  3.52 -37 40 42.9   49.0 -143.2 64
   2008  1 27  1 15 54492.553   2 42  4.55 -37 41 18.7   49.1 -143.0 62
   2008  1 27  1 30 54492.563   2 42  5.59 -37 41 54.4   49.2 -142.8 59
   2008  1 27  1 45 54492.574   2 42  6.63 -37 42 30.1   49.4 -142.6 56
   2008  1 27  2  0 54492.584   2 42  7.67 -37 43  5.7   49.5 -142.4 53
   2008  1 27  2 15 54492.595   2 42  8.72 -37 43 41.3   49.7 -142.2 50
   2008  1 27  2 30 54492.605   2 42  9.76 -37 44 16.8   49.9 -142.0 47
   2008  1 27  2 45 54492.615   2 42 10.82 -37 44 52.2   50.1 -141.8 44
   2008  1 27  3  0 54492.626   2 42 11.88 -37 45 27.6   50.3 -141.6 41
   2008  1 27  3 15 54492.636   2 42 12.94 -37 46  3.0   50.5 -141.5 38
   2008  1 27  3 30 54492.647   2 42 14.00 -37 46 38.4   50.7 -141.3 35
   2008  1 27  3 45 54492.657   2 42 15.07 -37 47 13.7   50.9 -141.2 32
   2008  1 27  4  0 54492.667   2 42 16.15 -37 47 48.9   51.2 -141.0 29
   2008  1 27  4 15 54492.678   2 42 17.23 -37 48 24.2   51.4 -140.9 26
   2008  1 27  4 30 54492.688   2 42 18.32 -37 48 59.4   51.6 -140.8 24
   2008  1 27  4 45 54492.699   2 42 19.41 -37 49 34.5   51.9 -140.7 21
   2008  1 27  5  0 54492.709   2 42 20.51 -37 50  9.7   52.1 -140.6 18
   2008  1 28  0 45 54493.532   2 43 47.45 -38 36 14.7   47.4 -135.3 67
   2008  1 28  1  0 54493.542   2 43 48.46 -38 36 48.5   47.5 -135.1 64
   2008  1 28  1 15 54493.553   2 43 49.48 -38 37 22.2   47.6 -134.8 61
   2008  1 28  1 30 54493.563   2 43 50.49 -38 37 55.9   47.7 -134.6 58
   2008  1 28  1 45 54493.574   2 43 51.51 -38 38 29.5   47.9 -134.4 55
   2008  1 28  2  0 54493.584   2 43 52.54 -38 39  3.1   48.0 -134.2 52
   2008  1 28  2 15 54493.595   2 43 53.56 -38 39 36.6   48.2 -134.1 49
   2008  1 28  2 30 54493.605   2 43 54.59 -38 40 10.1   48.4 -133.9 46
   2008  1 28  2 45 54493.615   2 43 55.63 -38 40 43.5   48.6 -133.7 43
   2008  1 28  3  0 54493.626   2 43 56.67 -38 41 16.9   48.8 -133.5 41
   2008  1 28  3 15 54493.636   2 43 57.71 -38 41 50.3   49.0 -133.4 38
   2008  1 28  3 30 54493.647   2 43 58.76 -38 42 23.6   49.2 -133.2 35
   2008  1 28  3 45 54493.657   2 43 59.81 -38 42 56.9   49.4 -133.1 32
   2008  1 28  4  0 54493.667   2 44  0.87 -38 43 30.1   49.6 -133.0 29
   2008  1 28  4 15 54493.678   2 44  1.93 -38 44  3.4   49.8 -132.9 26
   2008  1 28  4 30 54493.688   2 44  3.00 -38 44 36.6   50.1 -132.8 24
   2008  1 28  4 45 54493.699   2 44  4.07 -38 45  9.7   50.3 -132.7 21
   2008  1 28  5  0 54493.709   2 44  5.15 -38 45 42.9   50.5 -132.6 18
   2008  1 29  0 45 54494.532   2 45 30.53 -39 29 14.5   46.0 -127.8 66
   2008  1 29  1  0 54494.542   2 45 31.53 -39 29 46.4   46.1 -127.5 63
   2008  1 29  1 15 54494.553   2 45 32.52 -39 30 18.3   46.2 -127.3 60
   2008  1 29  1 30 54494.563   2 45 33.52 -39 30 50.1   46.3 -127.1 58
   2008  1 29  1 45 54494.574   2 45 34.53 -39 31 21.8   46.5 -126.9 55
   2008  1 29  2  0 54494.584   2 45 35.53 -39 31 53.5   46.6 -126.8 52
   2008  1 29  2 15 54494.595   2 45 36.54 -39 32 25.2   46.8 -126.6 49
   2008  1 29  2 30 54494.605   2 45 37.55 -39 32 56.8   47.0 -126.4 46
   2008  1 29  2 45 54494.615   2 45 38.57 -39 33 28.4   47.1 -126.2 43
   2008  1 29  3  0 54494.626   2 45 39.59 -39 33 59.9   47.3 -126.1 40
   2008  1 29  3 15 54494.636   2 45 40.62 -39 34 31.4   47.5 -125.9 37
   2008  1 29  3 30 54494.647   2 45 41.65 -39 35  2.9   47.7 -125.8 35
   2008  1 29  3 45 54494.657   2 45 42.68 -39 35 34.3   48.0 -125.7 32
   2008  1 29  4  0 54494.667   2 45 43.72 -39 36  5.7   48.2 -125.6 29
   2008  1 29  4 15 54494.678   2 45 44.77 -39 36 37.1   48.4 -125.5 26
   2008  1 29  4 30 54494.688   2 45 45.82 -39 37  8.4   48.6 -125.4 24
   2008  1 29  4 45 54494.699   2 45 46.87 -39 37 39.7   48.9 -125.3 21
   2008  1 29  5  0 54494.709   2 45 47.93 -39 38 11.0   49.1 -125.2 18
   2008  1 30  0 45 54495.532   2 47 11.88 -40 19 21.2   44.7 -120.8 66
   2008  1 30  1  0 54495.542   2 47 12.85 -40 19 51.4   44.8 -120.6 63
   2008  1 30  1 15 54495.553   2 47 13.83 -40 20 21.5   44.9 -120.4 60
   2008  1 30  1 30 54495.563   2 47 14.82 -40 20 51.6   45.0 -120.2 57
   2008  1 30  1 45 54495.574   2 47 15.80 -40 21 21.6   45.2 -120.0 54
   2008  1 30  2  0 54495.584   2 47 16.79 -40 21 51.6   45.3 -119.9 51
   2008  1 30  2 15 54495.595   2 47 17.78 -40 22 21.6   45.5 -119.7 49
   2008  1 30  2 30 54495.605   2 47 18.78 -40 22 51.5   45.7 -119.5 46
   2008  1 30  2 45 54495.615   2 47 19.78 -40 23 21.3   45.8 -119.4 43
   2008  1 30  3  0 54495.626   2 47 20.79 -40 23 51.1   46.0 -119.2 40
   2008  1 30  3 15 54495.636   2 47 21.80 -40 24 20.9   46.2 -119.1 37
   2008  1 30  3 30 54495.647   2 47 22.81 -40 24 50.7   46.4 -119.0 34
   2008  1 30  3 45 54495.657   2 47 23.83 -40 25 20.4   46.6 -118.8 32
   2008  1 30  4  0 54495.667   2 47 24.85 -40 25 50.1   46.9 -118.7 29
   2008  1 30  4 15 54495.678   2 47 25.88 -40 26 19.7   47.1 -118.6 26
   2008  1 30  4 30 54495.688   2 47 26.91 -40 26 49.4   47.3 -118.5 23
   2008  1 30  4 45 54495.699   2 47 27.95 -40 27 19.0   47.5 -118.5 21
   2008  1 30  5  0 54495.709   2 47 29.00 -40 27 48.6   47.7 -118.4 18
   2008  1 31  0 45 54496.532   2 48 51.61 -41  6 48.3   43.5 -114.4 65
   2008  1 31  1  0 54496.542   2 48 52.57 -41  7 16.9   43.6 -114.2 62
   2008  1 31  1 15 54496.553   2 48 53.54 -41  7 45.4   43.7 -114.0 59
   2008  1 31  1 30 54496.563   2 48 54.51 -41  8 13.9   43.8 -113.8 57
   2008  1 31  1 45 54496.574   2 48 55.48 -41  8 42.3   44.0 -113.7 54
   2008  1 31  2  0 54496.584   2 48 56.45 -41  9 10.7   44.1 -113.5 51
   2008  1 31  2 15 54496.595   2 48 57.43 -41  9 39.1   44.3 -113.3 48
   2008  1 31  2 30 54496.605   2 48 58.41 -41 10  7.4   44.5 -113.2 45
   2008  1 31  2 45 54496.615   2 48 59.40 -41 10 35.6   44.6 -113.0 42
   2008  1 31  3  0 54496.626   2 49  0.39 -41 11  3.9   44.8 -112.9 40
   2008  1 31  3 15 54496.636   2 49  1.38 -41 11 32.1   45.0 -112.8 37
   2008  1 31  3 30 54496.647   2 49  2.38 -41 12  0.2   45.2 -112.6 34
   2008  1 31  3 45 54496.657   2 49  3.39 -41 12 28.4   45.4 -112.5 31
   2008  1 31  4  0 54496.667   2 49  4.40 -41 12 56.5   45.6 -112.4 29
   2008  1 31  4 15 54496.678   2 49  5.41 -41 13 24.6   45.8 -112.3 26
   2008  1 31  4 30 54496.688   2 49  6.43 -41 13 52.6   46.1 -112.2 23
   2008  1 31  4 45 54496.699   2 49  7.45 -41 14 20.7   46.3 -112.2 21
   2008  1 31  5  0 54496.709   2 49  8.48 -41 14 48.7   46.5 -112.1 18