Atacama Pathfinder EXperiment APEX
LABOCA Calibration
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Home > Instrumentation > LABOCA > LABOCA Calibration > Array parameters

Array parameters July 2015
(25/06-06/09)

Main parameter file: laboca-2015-07.rcp

Individual scans

Scan #Date Parameter fileArray plotIndividual channel maps
34532 2015-06-25T05:26 Saturn_34532_Laboca.rcp array_34532.pdf beams_34532.pdf
34622 2015-06-25T09:21 Uranus_34622_Laboca.rcp array_34622.pdf beams_34622.pdf
34852 2015-06-26T05:03 Saturn_34852_Laboca.rcp array_34852.pdf beams_34852.pdf
34966 2015-06-26T08:37 Uranus_34966_Laboca.rcp array_34966.pdf beams_34966.pdf
44364 2015-07-24T03:57 Neptune_44364_Laboca.rcp array_44364.pdf beams_44364.pdf
44466 2015-07-24T07:43 Uranus_44466_Laboca.rcp array_44466.pdf beams_44466.pdf
44493 2015-07-24T08:54 Uranus_44493_Laboca.rcp array_44493.pdf beams_44493.pdf

Notes on individual channels

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

Compared to previous periods, channel 257 is not usable anymore, while channel 309 came back to life. Also channel 93 should be usable for date taken in this period, despite being located in group 4 (see below).

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 (except #93).
114, 116, 117, 118, 119, 120, 126, 128, 129, 130, 131, 132, 133, 134, 141, 147, 148, 152, 153, 154, 155, 156 Channels located in group 5 / cable L. These channels don't show astronomical signal (factor 20 below normal) 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/or cross-talk and are considered bad.
6, 45, 170, 199, 204, 206, 208, 211, 213, 219, 228, 241, 257 Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4, 5, or 7 above.

channel_flags-2015-07.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 or very high noise)
bad = [ 6,  45,  81,  82,  83,  84,  85,  86,  89,  90,  91,  92,  94,  96,
      114, 116, 117, 118, 119, 120, 126, 128, 129, 130, 131, 132, 133, 134,
      136, 141, 147, 148, 152, 153, 154, 155, 156, 159, 160, 170, 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, 257, 241 ]