Object: 501-035 On scan num: 734 736 738 740 742 744 Off scan num: 735 737 739 741 743 745 R.A.: 0.901602 hrs Dec.: 30.346787 deg On azimuth: 220.332758 deg On zenith dist.: 10.239097 deg Off azimuth: 219.602890 deg Off zenith dist.: 10.146324 deg MJD: 52244 UTC: 0.084618 Center freq.: 1388.919898 MHz Doppler: -0.00006557 Num. correlators: 2 Spectrom. atten.: 33 39 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 1800 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. Narrow band interference was removed from 12 channels by interpolation between the nearest valid channels
Peak intensity: 0.005 Jy
Lower 20% velocity: 6635.8 km/s
Upper 20% velocity: 6931.1 km/s
Systemic velocity: 6783.4 km/s
Line width (20%): 295.3 km/s
Profile integral: 1.14 Jy * km/s
A: 0.97
B: 1.08
Ratio B/A: 1.115
Flux integral
velocity range: 6623.5 - 6945.8 km/s
very low SNR