Object: 1500+8343 On scan num: 127 129 131 Off scan num: 128 130 132 R.A.: 14.935202 hrs Dec.: 83.523041 deg On azimuth: 353.926990 deg On zenith dist.: 55.732092 deg Off azimuth: 353.919379 deg Off zenith dist.: 55.725038 deg MJD: 52421 UTC: 0.521759 Center freq.: 1402.057801 MHz Doppler: -0.00002050 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 900 seconds
This spectrum is the integration of all data for the scan with spectra from both polarizations added together. The spectral intensities are Ssys * (on - off) / off, where Ssys is the system temperature in Jy. The system noise flux density equivalent is calibrated for each scan with a calibration noise source firing during each scan. The cal value, in Jy, is calibrated by comparison with a number of continuum sources as described in the summary web page
This is the section of spectrum measured to obtain the parameters listed below. The three horizontal dotted lines are the baseline, the peak level selected, and 20% of the peak level. The two vertical dotted lines mark the selected 20% line width edges. The solid horizontal line marks the velocity range chosen for the the line profile flux density integral. This spectrum has a second-order least squares fit baseline removed using most of the baseline shown in Figure 1.
Peak intensity: 0.071 Jy Lower 20% velocity: 3819.1 km/s Upper 20% velocity: 4014.6 km/s Systemic velocity: 3916.9 km/s Line width (20%): 195.4 km/s Profile integral: 9.37 Jy * km/s A: 8.64 B: 9.87 Ratio B/A: 1.142 Flux integral velocity range: 3781.8 - 4061.0 km/s
The off postion was not far enough away because of high declination.