Object: U12181 On scan num: 2231 2233 2235 2237 2239 2241 Off scan num: 2232 2234 2236 2238 2240 2242 R.A.: 22.768975 hrs Dec.: 38.050508 deg On azimuth: 280.374992 deg On zenith dist.: 27.515486 deg Off azimuth: 280.360250 deg Off zenith dist.: 27.482975 deg MJD: 52254 UTC: 0.045278 Center freq.: 1398.129255 MHz Doppler: -0.00007430 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1620 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 5 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 3 channels by interpolation between the nearest valid channels
Peak intensity: 0.029 Jy Lower 20% velocity: 4681.8 km/s Upper 20% velocity: 4831.7 km/s Systemic velocity: 4756.8 km/s Line width (20%): 149.9 km/s Profile integral: 3.34 Jy * km/s A: 2.60 B: 3.17 Ratio B/A: 1.219 Flux integral velocity range: 4667.2 - 4845.9 km/s