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LABOCA Calibration
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Home > Instrumentation > LABOCA > LABOCA Calibration > Array parameters

Array parameters August 2011 (11/07-10/10)

LABOCA warmed up during the big snow storm at the beginning of July. When the telescope was reachable, it was cooled down again and used starting on the 11th of July. It was continuosly used until the 10th of October, when it was warmed up to nitrogen temperature in order to concentrate on heterodyne projects.

Main parameter file: laboca-2011-08.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
41995 2011-07-11T08:26 Uranus_41995_Laboca.rcp array_41995.pdf beams_41995.pdf
41997 2011-07-11T08:58 Uranus_41997_Laboca.rcp array_41997.pdf beams_41997.pdf
42156 2011-07-12T00:21 Saturn_42156_Laboca.rcp array_42156.pdf beams_42156.pdf
44364 2011-07-19T22:53 Saturn_44364_Laboca.rcp array_44364.pdf beams_44364.pdf
45812 2011-07-26T05:13 Uranus_45812_Laboca.rcp array_45812.pdf beams_45812.pdf
49142 2011-08-05T05:41 Uranus_49142_Laboca.rcp array_49142.pdf beams_49142.pdf
49284 2011-08-05T11:21 Mars_49284_Laboca.rcp array_49284.pdf beams_49284.pdf
59795 2011-08-30T05:08 Uranus_59795_Laboca.rcp array_59795.pdf beams_59795.pdf
60091 2011-08-31T08:41 Uranus_60091_Laboca.rcp array_60091.pdf beams_60091.pdf
63401 2011-09-10T03:50 Uranus_63401_Laboca.rcp array_63401.pdf beams_63401.pdf
65502 2011-09-16T07:43 Uranus_65502_Laboca.rcp array_65502.pdf beams_65502.pdf
66345 2011-09-19T05:04 Uranus_66345_Laboca.rcp array_66345.pdf beams_66345.pdf
67239 2011-09-22T03:06 Uranus_67239_Laboca.rcp array_67239.pdf beams_67239.pdf
72163 2011-10-09T04:13 Uranus_72163_Laboca.rcp array_72163.pdf beams_72163.pdf

Notes on individual channels

Note: Channels which are terminated with a resistor are not listed in the following table anymore.

Channel #Description
101, 103, 106, 110 Strong cross-talk: 101↔106 and 103↔110. 101 and 103 may be usable for point sources only.
81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 96, 136, 159, 160 Channels located in group 4 / cable M. These channels usually don't show any astronomical signal. Channels 92 and 93 are variable, the latter may be usable.
177, 179, 180, 182, 183, 184, 185, 191, 192, 201, 202, 203, 205, 207, 217, 218, 220 Channels located in group 7 / cable A. These channels mostly don't show astronomical signal and are considered bad.
6, 114, 133, 199, 204, 206, 208, 211, 213, 228, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above.
216 Variable channel (towards the end of the period). Check your data.
241 No proper signal. Picks up signal from channels 248 (strong) and 296 (weak).

channel_flags-2011-06.boa:
The channels which have to be considered bad are identical to those in period 2011-06 (but see comments on channels 92, 93, and 216 above). Thus the same macro can be used for flagging them.

# 25 channels not connected to any bolometer
not_connected = [ 29,  33,  35,  40,  64,  66, 124, 135, 142, 144, 146, 151,
                 158, 189, 193, 195, 200, 224, 226, 284, 295, 302, 304, 306,
                 311 ]
# 20 channels with 1MOhm resistor
resistor = [  15,  16,  87,  88,  95, 139, 143, 145, 149, 150, 157, 178,
             181, 186, 187, 188, 190, 255, 310, 317 ]
# 2 channels sealed with an absorber
blind = [ 4, 163 ]
sealed = blind
# channels showing strong cross-talk
cross = [ 101, 103, 106, 110, 241 ]
# Bad channels (no/low signal)
bad = [ 6,  81,  82,  83,  84,  85,  86,  89,  90,  91,  92,  93,  94,  96, 114,
      133, 136, 159, 160, 177, 179, 180, 182, 183, 184, 185, 191, 192, 199, 201,
      202, 203, 204, 205, 206, 207, 208, 211, 213, 217, 218, 220, 228, 309 ]