Object: N00496 On scan num: 857 859 861 863 865 Off scan num: 858 860 862 864 866 R.A.: 1.386602 hrs Dec.: 33.529610 deg On azimuth: 71.146659 deg On zenith dist.: 56.615890 deg Off azimuth: 71.125737 deg Off zenith dist.: 56.650103 deg MJD: 52508 UTC: 0.161308 Center freq.: 1392.639977 MHz Doppler: 0.00008135 Num. correlators: 2 Spectrom. atten.: 41 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1380 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 3 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: 0.028 Jy Lower 20% velocity: 5839.0 km/s Upper 20% velocity: 6161.1 km/s Systemic velocity: 6000.0 km/s Line width (20%): 322.1 km/s Profile integral: 6.96 Jy * km/s A: 6.45 B: 7.17 Ratio B/A: 1.112 Flux integral velocity range: 5804.4 - 6183.9 km/s
More HI to high velocity side not included in width and flux integral.