Object: N5166 On scan num: 261 263 265 267 269 Off scan num: 262 264 266 268 270 R.A.: 13.471118 hrs Dec.: 32.029599 deg On azimuth: 227.307012 deg On zenith dist.: 9.053531 deg Off azimuth: 227.405068 deg Off zenith dist.: 9.067794 deg MJD: 52483 UTC: 0.952106 Center freq.: 1398.575704 MHz Doppler: -0.00006702 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 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: 0.006 Jy Lower 20% velocity: 4414.2 km/s Upper 20% velocity: 4944.3 km/s Systemic velocity: 4679.2 km/s Line width (20%): 530.1 km/s Profile integral: 2.59 Jy * km/s A: 2.92 B: 1.14 Ratio B/A: 0.390 Flux integral velocity range: 4395.9 - 4965.8 km/s