. . meaning those preceded by pointing/focus/align_x/align_y/pointing and in close temporal proximity to a skydip.
UT date # UT tau_cso see skydip# tau_850 tau_450
Dec 2000
08 83 17:40 0.12 0.69 84 0.464 +- 0.014 -
09 74 17:57 0.10 0.39 68,77 +0.419 +- 0.013 -
09 83 19:32 0.11 0.89 77,86 +0.387 +- 0.008 2.17 +- 0.06
10 46 18:19 0.07 0.42 47 0.232 +- 0.011* 1.43 +- 0.02
19 89** 16:49 0.09 0.24 92 0.344 +- 0.011 1.91 +- 0.16
24 97 18:40 0.09 0.26 98 0.152 +- 0.002 0.69 +- 0.01
* - strangely poor
+ - used equal time divisions for night of UT 20001209 between
skydips and jiggle maps.
** - chop 45" LO : others are 120" AZ
Beam Parameters (after rebinning into AZ coordinates)
850um
UT # ratio orient Gamma FHWM_min stats_max FCF
max/min deg " volts Jy/V
20001208:83 1.079 175 2.122 14.67 1.289 225
09:74 1.068 177 2.144 14.82 1.339 218
09:83 1.058 166 2.120 14.91 1.311 223
10:46 1.061 2 2.134 14.97 1.229 240
19:89 1.041 175 2.214 15.42 1.504 212
24:97 1.041 21 2.148 15.05 1.585 210
------- ------ ------ -----
1.058 2.147 14.97 221
+- 15 34 25 11
c.f. 1.057 2.154 14.97 219
+- 4 7 25 21
from the June 2000 analysis of early-2000 data.
450um
from the same analysis.
Conclusion
The 850W and 450W beams of SCUBA are unchanged from a year ago
in all measurable ways.
UT # ratio orient Gamma FHWM_min stats_max FCF
max/min deg " volts Jy/V
20001209:83 1.113 114 1.887 7.557 3.72 260
10:46 1.141 95 1.812 7.273 3.17 308
19:89 1.092 138 2.119 8.147 3.83 273
24:97 1.022 95 1.990 8.119 3.91 278
------- ------ ------- -----
1.09 1.95 7.8 280
+- 5 13 5 20
cf 1.17 1.94 7.6 308
+- 9 12 6 109
04 Jan 2001