Object: 1223+05 On scan num: 132 134 136 138 140 142 Off scan num: 133 135 137 139 141 143 R.A.: 12.425885 hrs Dec.: 4.814931 deg On azimuth: 124.277656 deg On zenith dist.: 48.223712 deg Off azimuth: 124.239371 deg Off zenith dist.: 48.248117 deg MJD: 52603 UTC: 0.453194 Center freq.: 1409.093531 MHz Doppler: 0.00008686 Num. correlators: 2 Spectrom. atten.: 38 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1800 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: 0.011 Jy Lower 20% velocity: 2370.4 km/s Upper 20% velocity: 2619.8 km/s Systemic velocity: 2495.1 km/s Line width (20%): 249.4 km/s Profile integral: 1.74 Jy * km/s A: 1.48 B: 1.68 Ratio B/A: 1.138 Flux integral velocity range: 2342.8 - 2789.3 km/s
very shallow high velocity wing