Object: N_834 On scan num: 88 90 92 Off scan num: 89 91 93 R.A.: 2.183731 hrs Dec.: 37.666517 deg On azimuth: 280.387563 deg On zenith dist.: 29.308100 deg Off azimuth: 280.370148 deg Off zenith dist.: 29.272299 deg MJD: 52342 UTC: 0.950336 Center freq.: 1399.049685 MHz Doppler: -0.00007640 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 840 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 6 channels by interpolation between the nearest valid channels
Peak intensity: 0.018 Jy Lower 20% velocity: 4406.5 km/s Upper 20% velocity: 4749.0 km/s Systemic velocity: 4577.7 km/s Line width (20%): 342.6 km/s Profile integral: 4.13 Jy * km/s A: 3.61 B: 4.60 Ratio B/A: 1.274 Flux integral velocity range: 4408.9 - 4783.0 km/s
RFI in low velocity wing, very poorly defined profile edges