Object: N2389 On scan num: 55 57 59 Off scan num: 56 58 60 R.A.: 7.484632 hrs Dec.: 33.860761 deg On azimuth: 159.840489 deg On zenith dist.: 4.862769 deg Off azimuth: 160.692995 deg Off zenith dist.: 4.839177 deg MJD: 52755 UTC: 0.930590 Center freq.: 1402.113741 MHz Doppler: -0.00009257 Num. correlators: 2 Spectrom. atten.: 27 31 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 900 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 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 1.
Peak intensity: 0.070 Jy Lower 20% velocity: 3761.2 km/s Upper 20% velocity: 4246.0 km/s Systemic velocity: 4003.6 km/s Line width (20%): 484.7 km/s Profile integral: 25.02 Jy * km/s A: 24.18 B: 23.94 Ratio B/A: 0.990 Flux integral velocity range: 3733.2 - 4334.6 km/s