Object: CIG452 On scan num: 124 126 128 130 132 134 Off scan num: 125 127 129 131 133 135 R.A.: 10.988803 hrs Dec.: 71.844764 deg On azimuth: 21.406643 deg On zenith dist.: 42.031270 deg Off azimuth: 21.419127 deg Off zenith dist.: 42.050172 deg MJD: 52769 UTC: 0.900081 Center freq.: 1393.239003 MHz Doppler: -0.00005124 Num. correlators: 2 Spectrom. atten.: 27 40 dB Bandwidth: 40.0 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.
Peak intensity: 0.006 Jy Lower 20% velocity: 6682.5 km/s Upper 20% velocity: 6996.8 km/s Systemic velocity: 6839.7 km/s Line width (20%): 314.3 km/s Profile integral: 1.28 Jy * km/s A: 1.17 B: 1.28 Ratio B/A: 1.093 Flux integral velocity range: 6646.6 - 7017.4 km/s