Object: N-4632 On scan num: 304 306 308 310 312 Off scan num: 305 307 309 311 313 R.A.: 12.708890 hrs Dec.: -0.082430 deg On azimuth: 239.175876 deg On zenith dist.: 57.179625 deg Off azimuth: 239.138788 deg Off zenith dist.: 57.151321 deg MJD: 52485 UTC: 0.024086 Center freq.: 1412.230695 MHz Doppler: -0.00008768 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1320 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.
Peak intensity: 0.235 Jy Lower 20% velocity: 1600.7 km/s Upper 20% velocity: 1848.4 km/s Systemic velocity: 1724.6 km/s Line width (20%): 247.6 km/s Profile integral: 47.14 Jy * km/s A: 43.45 B: 47.39 Ratio B/A: 1.091 Flux integral velocity range: 1577.8 - 1876.0 km/s