Object: UGC8801 On scan num: 1138 1140 1142 1144 Off scan num: 1139 1141 1143 1145 R.A.: 13.892169 hrs Dec.: -1.193779 deg On azimuth: 205.506532 deg On zenith dist.: 42.503227 deg Off azimuth: 205.471128 deg Off zenith dist.: 42.494471 deg MJD: 52245 UTC: 0.647326 Center freq.: 1387.649051 MHz Doppler: 0.00006881 Num. correlators: 2 Spectrom. atten.: 35 41 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 480 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 23 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: 0.017 Jy Lower 20% velocity: 6901.0 km/s Upper 20% velocity: 7289.8 km/s Systemic velocity: 7095.4 km/s Line width (20%): 388.8 km/s Profile integral: 4.14 Jy * km/s A: 3.26 B: 0.00 Ratio B/A: 0.000 Flux integral velocity range: 6886.0 - 7303.9 km/s
RFI in low velocity wing, very weak profile