6.7 GHz Spectroscopy with the 26m telescope at HartRAO

HartRAO Home > Spectra Contents > 6.7GHz / 4.5cm Spectroscopy

6.7 GHz / 4.5 cm Spectroscopy with the 26m telescope

**Table 1. 6.7 GHz / 4.5 cm Receiver characteristics. PSS and SEFD for each sense of polarized radiation.**
Receiver type	dual cryogenic HEMTs
Polarization	LCP+RCP
RF filter	6658-6682 MHz
Zenith System Temperature	57 K
Point Source Sensitivity	5.1 Jy/K/Pol
System Equivalent Flux Density	700 Jy
Half Power Beamwidth	0.116 degrees

**Table 2. Lines observable at 6.7 GHz**
Spectral Line	Rest Frequency (MHz)
5_-1-6₀ A-methanol	6668.518
H99alpha	6676.078

Table 3. Velocity range, spectral resolution with 1024 channels, and minimum rms noise after 1 minute integration, for the given correlator bandwidth, for each sense of polarized radiation, at 6668 MHz.
Correlator	Velocity	Correlator	RMS Noise	RMS Noise
Bandwidth	Range	Resolution	in 1 min	in 1 min
MHz	km/s	km/s	K	Jy
32.000	1439.7	1.406	0.045	0.35
16.000	719.9	0.703	0.064	0.50
8.000	359.9	0.351	0.090	0.70
4.000	180.0	0.175	0.128	1.00
2.000	90.0	0.088	0.180	1.41
1.000	45.0	0.044	0.255	1.99
0.500	22.5	0.022	0.361	2.81
0.250	11.2	0.011	0.510	3.98
0.125	5.6	0.005	0.722	5.63