Object: IC5078 On scan num: 2201 Off scan num: 2202 R.A.: 21.042205 hrs Dec.: -16.816083 deg On azimuth: 202.083979 deg On zenith dist.: 58.087586 deg Off azimuth: 202.052246 deg Off zenith dist.: 58.078737 deg MJD: 52253 UTC: 0.929653 Center freq.: 1413.340484 MHz Doppler: -0.00008189 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 120 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 6 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: 0.168 Jy Lower 20% velocity: 1336.7 km/s Upper 20% velocity: 1617.4 km/s Systemic velocity: 1477.1 km/s Line width (20%): 280.7 km/s Profile integral: 37.72 Jy * km/s A: 30.34 B: 36.54 Ratio B/A: 1.204 Flux integral velocity range: 1321.2 - 1628.3 km/s
something peculiar about calibration of unedited or edited spectrum, or both