Array parameters August 2008 (25/07-08/09)

LABOCA was warm between the 3rd and 22nd of July. It was cooled down afterwards and was operational from July 25th until September 7th, when we decided to warm it up to 77K because of a shortage of liquid Helium.

Main parameter file: laboca-2008-08.rcp

Individual scans

Scan #	Date	Parameter file	Array plot	Individual channel maps
34178	2008-07-26T07:22	Uranus_34178_Laboca.rcp	array_34178.pdf	beams_34178.pdf
35710	2008-07-31T05:15	Uranus_35710_Laboca.rcp	array_35710.pdf	beams_35710.pdf
35797	2008-07-31T22:29	Mars_35797_Laboca.rcp	array_35797.pdf	beams_35797.pdf
37013	2008-08-06T22:58	Mars_37013_Laboca.rcp	array_37013.pdf	beams_37013.pdf
37213¹	2008-08-07T18:12	Mars_37213_Laboca.rcp	array_37213.pdf	beams_37213.pdf
38771	2008-08-15T05:29	Uranus_38771_Laboca.rcp	array_38771.pdf	beams_38771.pdf
38903¹	2008-08-15T18:48	Mars_38903_Laboca.rcp	array_38903.pdf	beams_38903.pdf
39585	2008-08-19T22:27	Mars_39585_Laboca.rcp	array_39585.pdf	beams_39585.pdf
39814	2008-08-20T08:26	Uranus_39814_Laboca.rcp	array_39814.pdf	beams_39814.pdf

¹ Scan 37213 and 38903 are not usable because of extreme atmospheric instability. They are just listed here for completeness.

Notes on individual channels

Channel #	Description
101, 103, 106, 110	Strong cross-talk: 101↔106 (also noisy) & 103↔110.
81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 96, 136, 159, 160	Active channels located in group 4 / cable M. No signal/noisy or cross-talk with channel 83.
6, 184, 192, 220, 257	Bad channels not showing any astronomical signal.
201, 205, 207, 218, 228, 309	Insensitive channels, showing very low signal levels.
98, 179, 191, 202, 219	Suspicious channels (sometimes bad, sometimes not)
241	No proper signal. Picks up signal from channels 248 (strong) and 296 (weak).

channel_flags-2008-08.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, 241 ]
# Bad channels (no astronomical signal, noisy or insensitive)
bad = [ 6, 98, 179, 184, 191, 192, 201, 205, 207, 218, 220, 228, 257, 309 ]
# Suspicious channels (sometimes bad, but usually not - check your data)
bad_maybe = [ 202, 219 ]
# Remaining bolometers on cable M / group 4 (bad and/or cross-talk)
cable_M = [ 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 96, 136, 159, 160 ]
# Cable_M is considered bad
bad = bad + cable_M

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