11cm secondary focus receiver (2.595-2.675 GHz)

This system is mainly used for sensitive continuum observations. Be aware, that this band may be influenced by RFI. Hence, the bandwidth should not be too large.

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
2.6395 A/B LCP/RCP 2.5 17 1.5 11 53 2.3 81 275 Jan 2014
normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) Observed in confirmed
A0 = 1.0A1 = 0.0A2 = 0.0Feb 2007 Nov 2012

Comments:

  • The values for LCP and RCP do not differ significantly.
  • A typical value for the zenith opacity is 0.015.

Version description for OBSINP

RX Name Wavelength [cm] Frequency (center) [GHz] Nr. of Horns
S110mm 11 2.6-2.68 (2.64) 1
Version: Comment
1. All Modes (BW: 80 MHz) Narrow band Continuum + 8 ch. polarimeter
Horn offsets [arcsec] 19.0, 1593.0

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

11cm SFK single horn receiver (multi channel polarimeter 2.595-2.675GHz)
Channel IF Pol. Comment
1 SB LCP center=2.595 GHz, BW=10 MHz, TP A
2 SB RCP center=2.595 GHz, BW=10 MHz, TP B
3 SB cross center=2.595 GHz, BW=10 MHz, cos AB
4 SB cross center=2.595 GHz, BW=10 MHz, sin AB
5 SB LCP center=2.605 GHz, BW=10 MHz, TP A
6 SB RCP center=2.605 GHz, BW=10 MHz, TP B
7 SB cross center=2.605 GHz, BW=10 MHz, cos AB
8 SB cross center=2.605 GHz, BW=10 MHz, sin AB
9–28 continues in 10 MHz steps until
29 SB LCP center=2.675 GHz, BW=10 MHz, TP A
30 SB RCP center=2.675 GHz, BW=10 MHz, TP B
31 SB cross center=2.675 GHz, BW=10 MHz, cos AB
32 SB cross center=2.675 GHz, BW=10 MHz, sin AB
the last 4 channels contain the total IF 2.595-2.675 GHz
33 SB LCP center=2.635 GHz, BW=80 MHz, TP A
34 SB RCP center=2.635 GHz, BW=80 MHz, TP B
35 SB cross center=2.635 GHz, BW=80 MHz, cos AB
36 SB cross center=2.635 GHz, BW=80 MHz, sin AB

Spectroscopy modes and resolution

BW nchan nu Df Dv dv
MHz MHz kHz km/s km/s
100 32768 2600 3.1 0.352 0.408

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

Tcal

Tsys

Trms

 
information_for_astronomers/rx/s110mm.txt · Last modified: 2014/01/20 16:49 by akraus     Back to top