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Table 1. Using a special external LO, frequencies down to 77 GHz can be measured with good sideband rejection. For frequencies below 77 GHz, the sideband recection becomes weaker, and the sideband ratio reaches unity at 72 GHz 2. Noise increasing with frequency 3. 2x(3x3) pixel receiver with a 24" separation of the pixels. Equipped with a derotator allowing to follow a source in the sky maintaining the same "footprint". == Bolometer Parameters == Table local contact for bolometers: Stephane Leon == Efficiencies and Half-power beam width == Below you find the most recent values for the forward and beam efficiencies. We have also compiled the value of the efficiencies in the past . Here you can find the plot with the most recently measured beam efficiencies. |
This page summarizes the present instrumentation at the 30m observatory. The current status is described on another [http://www.iram.es/IRAMES/mainWiki/TelescopeSystemStatus page].
[TableOfContents(3)]]
Receiver Parameters
A maximum of four receivers, from the total of eight, can be used simultaneously. The following table summarizes the allowed combinations and some of the most important receiver characteristics. Plots of the receiver characteristics. HERA cannot be combined with other receivers; up to now not all frequencies have been pretuned. Hera has 18 pixels separated by 24". Local contact for HERA: Albrecht Sievers
Table
- Using a special external LO, frequencies down to 77 GHz can be measured with good sideband rejection. For frequencies below 77 GHz,
the sideband recection becomes weaker, and the sideband ratio reaches unity at 72 GHz
- Noise increasing with frequency
- 2x(3x3) pixel receiver with a 24" separation of the pixels. Equipped with a derotator allowing to follow a source in the sky maintaining the same "footprint".
Bolometer Parameters
Table
local contact for bolometers: Stephane Leon
Efficiencies and Half-power beam width
Below you find the most recent values for the forward and beam efficiencies. We have also compiled the value of the efficiencies in the past .
Here you can find the plot with the most recently measured beam efficiencies.