Object: 04071+3810 On scan num: 2414 2416 2418 2420 2422 2424 Off scan num: 2415 2417 2419 2421 2423 2425 R.A.: 4.175709 hrs Dec.: 38.311671 deg On azimuth: 278.879437 deg On zenith dist.: 22.803570 deg Off azimuth: 278.865919 deg Off zenith dist.: 22.774198 deg MJD: 52255 UTC: 0.250486 Center freq.: 1403.058525 MHz Doppler: -0.00002177 Num. correlators: 2 Spectrom. atten.: 34 39 dB Bandwidth: 40.0 MHz Num. channels: 1024 Eff. integration: 1500 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 4th-order least squares fit baseline removed using most of the baseline shown in Figure 2.
Peak intensity: 0.003 Jy Lower 20% velocity: 6213.6 km/s Upper 20% velocity: 6400.1 km/s Systemic velocity: 6306.8 km/s Line width (20%): 186.5 km/s Profile integral: 0.69 Jy * km/s A: 1.67 B: 0.67 Ratio B/A: 0.402 Flux integral velocity range: 6161.8 - 6428.3 km/s
very low SNR, profile could extend further to high velocity side