Object: 1225+09 On scan num: 132 134 136 138 140 142 Off scan num: 133 135 137 139 141 143 R.A.: 12.458370 hrs Dec.: 9.338493 deg On azimuth: 195.880891 deg On zenith dist.: 29.906749 deg Off azimuth: 195.856021 deg Off zenith dist.: 29.904006 deg MJD: 52777 UTC: 0.107569 Center freq.: 1412.230950 MHz Doppler: -0.00007756 Num. correlators: 2 Spectrom. atten.: 28 33 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1740 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 spectrum is the same as Figure 1 but with 2 60-second sub-integrations manually deleted because of interference or a bad baseline.
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 2.
Peak intensity: 0.009 Jy Lower 20% velocity: 1704.1 km/s Upper 20% velocity: 1742.3 km/s Systemic velocity: 1723.2 km/s Line width (20%): 38.2 km/s Profile integral: 0.21 Jy * km/s A: 0.19 B: 0.22 Ratio B/A: 1.152 Flux integral velocity range: 1699.6 - 1747.6 km/s