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Christopher Stubbs

Christopher Stubbs

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So within 2 airmasses we can get to 3/4 of the entire sky. A six-band, annual 3pi survey would require 6*3222 = 19K visits. At 50 seconds per visit, this is essentially 16K minutes ~ 270 hours = 30 nights per year. But of course it's only the marginal investment that should count. 

Airmass vs. HA and dec, with field centers for N-up implementation:Image Removed

Image Added

Number of fields vs. declination

-90 0
-87 7
-84 13
-81 19
-78 25
-75 31
-72 36
-69 42
-66 48
-63 53
-60 59
-57 64
-54 69
-51 74
-48 78
-45 83
-42 87
-39 91
-36 94
-33 98
-30 101
-27 104
-24 107
-21 109
-18 111
-15 113
-12 114
-9 115
-6 116
-3 116
0 117
3 116
6 116
9 115
12 114
15 113
18 111
21 109
24 107
27 104
30 101

 

Cadence, coverage, and passband trades.

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