Object: UM538 On scan num: 77 79 81 83 85 Off scan num: 78 80 82 84 86 R.A.: 13.044619 hrs Dec.: 1.073622 deg On azimuth: 172.877987 deg On zenith dist.: 37.499498 deg Off azimuth: 172.843269 deg Off zenith dist.: 37.501483 deg MJD: 52765 UTC: 0.130613 Center freq.: 1415.995073 MHz Doppler: -0.00004934 Num. correlators: 2 Spectrom. atten.: 27 35 dB Bandwidth: 5.0 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 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: 0.007 Jy Lower 20% velocity: 882.8 km/s Upper 20% velocity: 921.4 km/s Systemic velocity: 902.1 km/s Line width (20%): 38.7 km/s Profile integral: 0.18 Jy * km/s A: 0.18 B: 0.17 Ratio B/A: 0.899 Flux integral velocity range: 878.6 - 929.4 km/s