Object: N5157 On scan num: 10 12 14 16 18 20 Off scan num: 11 13 15 17 19 21 R.A.: 13.454701 hrs Dec.: 32.030383 deg On azimuth: 290.827678 deg On zenith dist.: 62.947022 deg Off azimuth: 290.803593 deg Off zenith dist.: 62.910250 deg MJD: 52745 UTC: 0.433843 Center freq.: 1386.824663 MHz Doppler: -0.00002702 Num. correlators: 2 Spectrom. atten.: 27 38 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 11 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: 0.009 Jy Lower 20% velocity: 7052.2 km/s Upper 20% velocity: 7591.5 km/s Systemic velocity: 7321.9 km/s Line width (20%): 539.3 km/s Profile integral: 3.35 Jy * km/s A: 2.80 B: 3.64 Ratio B/A: 1.301 Flux integral velocity range: 7020.0 - 7627.9 km/s