Object: U12173 On scan num: 2219 2221 2223 2225 2227 2229 Off scan num: 2220 2222 2224 2226 2228 2230 R.A.: 22.731354 hrs Dec.: 38.379041 deg On azimuth: 275.898537 deg On zenith dist.: 15.307321 deg Off azimuth: 275.886302 deg Off zenith dist.: 15.277556 deg MJD: 52254 UTC: 0.000162 Center freq.: 1398.107357 MHz Doppler: -0.00007355 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1560 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 7 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 2 channels by interpolation between the nearest valid channels
Peak intensity: 0.034 Jy Lower 20% velocity: 4586.6 km/s Upper 20% velocity: 4961.4 km/s Systemic velocity: 4774.0 km/s Line width (20%): 374.8 km/s Profile integral: 8.05 Jy * km/s A: 4.95 B: 7.55 Ratio B/A: 1.524 Flux integral velocity range: 4559.5 - 4982.9 km/s