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

Array parameters October 2010 (15/09-20/11)

LABOCA was not used during the first half of September (but always kept cold). After that period, the channel offsets were found to have changed, thus a new set of array parameters has been created.
LABOCA was in continuous use until it has been warmed up on the 20th of November.

Main parameter file: laboca-2010-10.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
69187 2010-09-16T21:44 Mars_69187_Laboca.rcp array_69187.pdf beams_69187.pdf
69328 2010-09-17T07:10 Uranus_69328_Laboca.rcp array_69328.pdf beams_69328.pdf
69478 2010-09-17T19:06 Mars_69478_Laboca.rcp array_69478.pdf beams_69478.pdf
73594 2010-09-29T01:22 Uranus_73594_Laboca.rcp array_73594.pdf beams_73594.pdf
73977 2010-09-30T03:58 Uranus_73977_Laboca.rcp array_73977.pdf beams_73977.pdf
74276 2010-10-01T06:01 Uranus_74276_Laboca.rcp array_74276.pdf beams_74276.pdf
77888 2010-10-14T01:43 Uranus_77888_Laboca.rcp array_77888.pdf beams_77888.pdf
80078 2010-10-23T00:44 Uranus_80078_Laboca.rcp array_80078.pdf beams_80078.pdf
83942 2010-11-09T04:43 Uranus_83942_Laboca.rcp array_83942.pdf beams_83942.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. Although they are variable to some extent, we consider them as bad.
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, 204, 208, 213, 228, 257, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above. Channel 257 is variable and may be usable.
241 No proper signal. Picks up signal from channels 248 (strong) and 296 (weak).

channel_flags-2010-10.boa:

# 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, 136, 159, 160, 177, 179, 180, 182, 183, 184, 185, 191, 192, 201,
       202, 203, 204, 205, 207, 208, 213, 217, 218, 220, 228, 257, 309 ]