1.0cm primary focus receiver (26500-38500 MHz)

This receiver was build for spectroscopic observations. It has a linearly polarized feed.

Calibration Information

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
27.0 A linear 7.2 68 0.94 71 34 1.8 54 30.5 Mar 2010
30.0 A linear 7.0 85 0.90 84 32 1.5 60 30.0 Mar 2017
34.0 A linear 12.0 75 0.86 86 30 1.5 61 25.0 Mar 2010
36.1 A linear 15.0 82 0.56 146 20 1.4 49 25.8 Sep 2014
normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) Observed in / confirmed
A0=0.8473A1=1.0795E-2 A2=-1.9074E-4Sep 2014 (36 GHz)

Comments:

  • Typical zenith opacities range from 0.05 to 0.2 depending on the sky frequency and weather conditions.

Version description for OBSINP

RX Name Wavelength [cm] Frequency (center) [GHz] Nr. of Horns
P10mm 4-Box (26,5-38,5 GHz) 1.0 26.5-38.5 1
Version: Comment
1. Cont./Line: 26,5-29,1 GHz (BW: 500 MHz) Continuum and spectroscopy 1st freq. range
2. Cont./Line: 28,52-32,7 GHz (BW: 500 MHz) Continuum and spectroscopy 2nd freq. range
3. Cont./Line: 32,3-38,5 GHz (BW: 500 MHz) Continuum and spectroscopy 3rd freq. range
4. Pulsar (BW: 500 MHz) Pulsar version 1st freq. range (26.5-29.1 GHz)
Horn offsets [arcsec] -972.8, 1086.6

Channel assignment in the MBFITS data files

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

1.0cm PFK (Multi-RX-Box I)
Channel IF Pol. Comment
1 BB linear TP A
2 VLBA linear TP A

Spectroscopy modes and resolution

BW nchan nu Df Dv dv
MHz MHz kHz km/s km/s
100 32768 27000 3.1 0.034 0.039
100 32768 29000 3.1 0.032 0.037
100 32768 31000 3.1 0.030 0.034
100 32768 33000 3.1 0.028 0.032
100 32768 35000 3.1 0.026 0.030
100 32768 37000 3.1 0.025 0.029
500 32768 27000 15.3 0.169 0.197
500 32768 29000 15.3 0.158 0.183
500 32768 31000 15.3 0.148 0.171
500 32768 33000 15.3 0.139 0.161
500 32768 35000 15.3 0.131 0.152
500 32768 37000 15.3 0.124 0.143

BW … band width
nchan … number of spectral channels
nu … center frequency
Df … Channel separation (in frequency)
Dv … Channel separation (in velocity)
dv … Velocity resolution (dv=1.16*Dv)

Tcal and Tsys measurements

 
information_for_astronomers/rx/p10mm.txt · Last modified: 2017/08/10 11:37 by akraus     Back to top