Object: UM461 On scan num: 19 21 23 25 27 29 Off scan num: 20 22 24 26 28 30 R.A.: 11.859167 hrs Dec.: -2.373008 deg On azimuth: 117.423283 deg On zenith dist.: 63.073000 deg Off azimuth: 117.386202 deg Off zenith dist.: 63.105151 deg MJD: 52600 UTC: 0.398553 Center freq.: 1415.626284 MHz Doppler: 0.00008917 Num. correlators: 2 Spectrom. atten.: 38 37 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 1740 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: 0.068 Jy Lower 20% velocity: 998.9 km/s Upper 20% velocity: 1084.2 km/s Systemic velocity: 1041.6 km/s Line width (20%): 85.3 km/s Profile integral: 3.93 Jy * km/s A: 3.66 B: 3.99 Ratio B/A: 1.089 Flux integral velocity range: 988.1 - 1101.2 km/s