Object: NGC2708A On scan num: 131 133 135 137 139 141 143 Off scan num: 132 134 136 138 140 142 144 R.A.: 8.938650 hrs Dec.: -3.182213 deg On azimuth: 210.654927 deg On zenith dist.: 46.083740 deg Off azimuth: 210.617099 deg Off zenith dist.: 46.072179 deg MJD: 52739 UTC: 0.102894 Center freq.: 1410.549242 MHz Doppler: -0.00008241 Num. correlators: 2 Spectrom. atten.: 27 38 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 1980 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: 0.022 Jy Lower 20% velocity: 1928.1 km/s Upper 20% velocity: 2130.8 km/s Systemic velocity: 2029.5 km/s Line width (20%): 202.7 km/s Profile integral: 2.97 Jy * km/s A: 2.70 B: 2.94 Ratio B/A: 1.086 Flux integral velocity range: 1857.1 - 2152.7 km/s