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Mambo Bolometers at IRAM-30m

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Description

The Mambo-1 and Mambo-2 bolometers have been developed at the [http://www.mpifr-bonn.mpg.de/div/bolometer/ Max-Planck-Institut fur Radiostronomie] in Bonn by the group of Ernst Kreysa.

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Status

Online

• Mambo1 is currently not available.
• Mambo2 is currently online

He-Refilling

Mambo1 or Mambo2 are currently refilled with He4 every 48 hours.

OnOff pixel

• Mambo1: pixel 1 is the most sensitive.
• Mambo2: pixel 20 is the most sensitive.

Dead/Noisy Pixels

Instabilities

• Acceleration problem:
• Gradient noise: about 6 % of scans are affected (stats. between 20.03.2007 and 30.03.2007)

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Observing modes

The bolometers have two basic modes of observations:

• On-Off: flux measurement with a single pixel on a point-like source, using the wobbler switching.

• Mapping: On-the-fly map using the wobbler switching. By default the on-the-fly scanning is along the azimuth direction together with the wobbler switching. It is now possible to rotate the wobbler with the scanning direction to get rotated map. The rotated angle is currently in the range [-60,60] degrees.

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Data Reduction

The data from the bolometer observations are recorded in IMBfits format. The data can be reduced using the Mopsic program MailTo(zylka@iram.fr)) which is part of the GILDAS package.

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Contact Persons

Pool Manager: S. Leon (MailTo(leon@iram.es)) BR Bolometer Expert: A. Sievers (MailTo(sievers@iram.es)) BR Mopsic development: R. Zylka (MailTo(zylka@iram.fr)) BR Mambo/Abba expertise: G. Siringo (MailTo(gsiringo@mpifr-bonn.mpg.de))

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Useful Links

• [:http://www.iram.es/IRAMES/mainWiki/PoolObserving:Mambo Pool] at the IRAM-30m:

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