Object: DDO163 On scan num: 3 5 53 55 Off scan num: 4 6 54 56 R.A.: 13.087310 hrs Dec.: -7.889066 deg On azimuth: 120.831402 deg On zenith dist.: 67.733527 deg Off azimuth: 120.850559 deg Off zenith dist.: 67.717008 deg MJD: 52806 UTC: 0.881782 Center freq.: 1414.382089 MHz Doppler: -0.00008898 Num. correlators: 2 Spectrom. atten.: 0 0 dB Bandwidth: 12.5 MHz Num. channels: 8192 Eff. integration: 1170 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: 0.131 Jy Lower 20% velocity: 1037.5 km/s Upper 20% velocity: 1210.4 km/s Systemic velocity: 1124.0 km/s Line width (20%): 172.8 km/s Profile integral: 17.75 Jy * km/s A: 17.17 B: 18.32 Ratio B/A: 1.067 Flux integral velocity range: 1015.8 - 1232.9 km/s