Object: UGC8801 On scan num: 722 724 726 728 730 732 Off scan num: 723 725 727 729 731 733 R.A.: 13.892148 hrs Dec.: -1.193646 deg On azimuth: 126.781237 deg On zenith dist.: 54.379537 deg Off azimuth: 126.749010 deg Off zenith dist.: 54.400580 deg MJD: 52262 UTC: 0.441192 Center freq.: 1387.278989 MHz Doppler: 0.00008783 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1440 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 12 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. Narrow band interference was removed from 6 channels by interpolation between the nearest valid channels
Peak intensity: 0.015 Jy Lower 20% velocity: 6911.4 km/s Upper 20% velocity: 7298.1 km/s Systemic velocity: 7104.7 km/s Line width (20%): 386.6 km/s Profile integral: 4.49 Jy * km/s A: 3.58 B: 4.27 Ratio B/A: 1.192 Flux integral velocity range: 6889.3 - 7323.4 km/s