Array parameters August 2013
(19/08-22/08)
LABOCA was cooled down during Swedish time in August, but warmed up again while the telescope was not reachable during a snowstorm.
Main parameter file: laboca-2013-08.rcp
Individual scans
| Scan # | Date | Parameter file | Array plot | Individual channel maps |
|---|---|---|---|---|
| 54306 | 2013-08-19T07:32 | Uranus_54306_Laboca.rcp | array_54306.pdf | beams_54306.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.
Compared to April and June 2013, the channels 257 and 307 now seem to be bad, while 309 was okay during the beammap.
| 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, 257, 307 | Bad channels, not showing any astronomical signal or very low signal levels, unconnected to groups 4 or 7 above. |
channel_flags-2013-08.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, 257, 307 ]
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