Object: U8801 On scan num: 172 174 176 178 180 182 184 186 188 190 192 194 Off scan num: 173 175 177 179 181 183 185 187 189 191 193 195 R.A.: 13.892198 hrs Dec.: -1.194365 deg On azimuth: 121.644515 deg On zenith dist.: 58.012066 deg Off azimuth: 121.607447 deg Off zenith dist.: 58.039999 deg MJD: 52379 UTC: 0.106215 Center freq.: 1387.561324 MHz Doppler: 0.00000559 Num. correlators: 2 Spectrom. atten.: 38 39 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 3300 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 10 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. Narrow band interference was removed from 10 channels by interpolation between the nearest valid channels
Peak intensity: 0.016 Jy Lower 20% velocity: 6920.9 km/s Upper 20% velocity: 7293.1 km/s Systemic velocity: 7107.0 km/s Line width (20%): 372.2 km/s Profile integral: 4.32 Jy * km/s A: 3.94 B: 4.34 Ratio B/A: 1.100 Flux integral velocity range: 6905.8 - 7307.6 km/s