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This is a 4-channel two horn system for continuum, spectroscopy and VLBI observations.
Attention: When frequencies lower than 35 GHz are selected, the receiver operates in
double sideband mode for some parts of the observed bandpass. Please contact staff for
advice.
Frequency [GHz] | Channel | Polarisation | Tcal [K] | Tsys [K] | Sensitivity [K/Jy] | SEFD [Jy] | Aperture Eff. [%] | TMB/S [K/Jy] | Main Beam Eff. [%] | FWHM [arcsec] | Last update |
---|---|---|---|---|---|---|---|---|---|---|---|
36.25 | A/B | LCP/RCP | 10.6 | 124 | 0.78 | 160 | 27 | 1.7 | 44 | 23.0 | Oct 2021 |
38.75 | A/B | LCP/RCP | 15.0 | 144 | 0.73 | 197 | 26 | 1.8 | 40 | 21.2 | Oct 2021 |
41.25 | A/B | LCP/RCP | 12.2 | 110 | 0.73 | 171 | 23 | 1.7 | 38 | 20.7 | Oct 2021 |
43.75 | A/B | LCP/RCP | 10.8 | 136 | 0.73 | 228 | 21 | 1.6 | 36 | 19.7 | Oct 2021 |
44.1 (narrow band) | A+B | LCP+RCP | 13 | 100 | 0.66 | 140 | 23 | 1.67 | 40 | 19.5 | Dec 2019 |
46.25 | A/B | LCP/RCP | 10.2 | 125 | 0.73 | 214 | 20 | 1.6 | 36 | 19.1 | Oct 2021 |
48.75 | A/B | LCP/RCP | 10.0 | 187 | 0.73 | 369 | 18 | 1.6 | 32 | 18.1 | Oct 2021 |
normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) | Observed in | confirmed | ||
---|---|---|---|---|
A0 = 0.8349 | A1 = 8.312E-3 | A2 = -1.046E-04 | Below 40 GHz, Oct 2021 | |
A0 = 0.7852 | A1 = 1.126E-2 | A2 = -1.475E-04 | 40-45 GHz, Oct 2021 | |
A0 = 0.7608 | A1 = 1.487E-2 | A2 = -2.310E-04 | 45-50 GHz, Oct 2021 |
Comments:
RX Name | Wavelength [cm] | Frequency (center) [GHz] | Nr. of Horns |
---|---|---|---|
S7mm double beam RX | 0.7 | 33.5-50.0 (42.0) | 2 |
Version: | Comment | ||
1. Continuum (BW: 2.5 GHz) | Broad Band Continuum | ||
2. Line (BW: 2500 MHz) | Spectroscopy/Continuum using optical IF | ||
Horn offsets [arcsec] | 107.7,-451.8; 219.2,-451.8 |
Note that the narrow line and VLBA IF channels are usually only available when the specific line version of the receiver was selected. In addition for most receivers with narrow line channels the cables at the patch board need to be connected by the receiver group.
To select different channel numbers in OBSINP, the online plot, or the toolbox the numbers have to be specified like c(1)+c(2) to add channel 1 and 2. E.g. channel 1 and 2 contain the LCP and RCP broadband channels, then "OnlPlot pen='c(1)+c(2)'" or "toolbox use='c(1)+c(2)'" will select these channels. In OBSINP the pen can be directly specified in the receiver selection menu.
Abbreviations:
SB: narrow band channel (Schmalband-Kanal), 100 MHz band width
BB: digital broad band channel (Breitband-Kanal), band width varies for different receivers
VLBA: VLBA IF, 500 MHz band width
BW: band width
TP: total power
7mm SFK dual horn receiver | |||
---|---|---|---|
Channel | IF | Pol. | Comment |
1 | 2.5 GHz | LCP | TP A, horn 1 |
2 | 2.5 GHz | RCP | TP B, horn 1 |
3 | 2.5 GHz | LCP | TP A, horn 2 |
4 | 2.5 GHz | RCP | TP B, horn 2 |
To be done.
To be done.