Object: LVM173. On scan num: 11 13 15 17 19 Off scan num: 12 14 16 18 20 R.A.: 6.792478 hrs Dec.: 47.654551 deg On azimuth: 59.233008 deg On zenith dist.: 31.410145 deg Off azimuth: 59.235112 deg Off zenith dist.: 31.441156 deg MJD: 52296 UTC: 0.050231 Center freq.: 1392.956325 MHz Doppler: -0.00003496 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1440 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 8 channels by interpolation between the nearest valid channels
Peak intensity: 0.005 Jy Lower 20% velocity: 5817.9 km/s Upper 20% velocity: 6235.7 km/s Systemic velocity: 6026.8 km/s Line width (20%): 417.7 km/s Profile integral: 1.31 Jy * km/s A: 1.28 B: 1.43 Ratio B/A: 1.111 Flux integral velocity range: 5796.5 - 6266.3 km/s
extremely low SNR, profile edge locations are pretty uncertain