Object: LDR09 On scan num: 253 255 257 259 261 263 Off scan num: 254 256 258 260 262 264 R.A.: 11.297489 hrs Dec.: -26.134384 deg On azimuth: 188.148799 deg On zenith dist.: 64.933126 deg Off azimuth: 188.111590 deg Off zenith dist.: 64.928993 deg MJD: 52623 UTC: 0.480532 Center freq.: 1410.471950 MHz Doppler: 0.00008804 Num. correlators: 2 Spectrom. atten.: 38 37 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 1740 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 2 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 2 channels by interpolation between the nearest valid channels
Peak intensity: 0.023 Jy Lower 20% velocity: 1954.7 km/s Upper 20% velocity: 2131.2 km/s Systemic velocity: 2043.0 km/s Line width (20%): 176.5 km/s Profile integral: 2.83 Jy * km/s A: 2.60 B: 2.77 Ratio B/A: 1.065 Flux integral velocity range: 1944.6 - 2142.0 km/s