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

Array parameters June 2013
(16/06-19/06)

LABOCA was cooled down in the first half of June. It was used only a few days during Chilean time, before a major snow storm blocked the access to the telescope. As a consequence, LABOCA warmed up, and was not used again during the following weeks.

Main parameter file: laboca-2013-06.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
38813 2013-06-16T23:55 Saturn_38813_Laboca.rcp array_38813.pdf beams_38813.pdf

Notes on individual channels

Note: Channels which are terminated with a resistor are not listed in the following table anymore.
Also, from 2013 onward channel #241 is listed under "bad channels" and not under "cross-talk", since the cross-talkers may be usable for point sources, while #241 is not usable at all.

Bad channels are identical to those from the April 2013 period.

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 and are considered 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 don't show astronomical signal and are considered bad.
6, 45, 114, 133, 199, 204, 206, 208, 211, 213, 219, 228, 241, 309 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above.

channel_flags-2013-04.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 ]
# Bad channels (no/low signal)
bad = [ 6,  45,  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,
      219, 220, 228, 241, 309 ]