Object: N5990 On scan num: 736 738 740 742 744 746 Off scan num: 737 739 741 743 745 747 R.A.: 15.771142 hrs Dec.: 2.414839 deg On azimuth: 234.378445 deg On zenith dist.: 50.511855 deg Off azimuth: 234.340992 deg Off zenith dist.: 50.487611 deg MJD: 52634 UTC: 0.721505 Center freq.: 1402.670847 MHz Doppler: 0.00006098 Num. correlators: 2 Spectrom. atten.: 38 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1680 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 4 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: 0.031 Jy Lower 20% velocity: 3615.8 km/s Upper 20% velocity: 3993.9 km/s Systemic velocity: 3804.8 km/s Line width (20%): 378.1 km/s Profile integral: 4.74 Jy * km/s A: 5.14 B: 5.79 Ratio B/A: 1.126 Flux integral velocity range: 3587.0 - 4052.0 km/s
two blended profiles?