Object: U00748 On scan num: 457 459 461 463 465 467 Off scan num: 458 460 462 464 466 468 R.A.: 1.195772 hrs Dec.: 35.276919 deg On azimuth: 78.330960 deg On zenith dist.: 39.894150 deg Off azimuth: 78.312669 deg Off zenith dist.: 39.926752 deg MJD: 52279 UTC: 0.837373 Center freq.: 1397.679928 MHz Doppler: -0.00008712 Num. correlators: 2 Spectrom. atten.: 33 40 dB Bandwidth: 10.0 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 9 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: 0.047 Jy Lower 20% velocity: 4692.1 km/s Upper 20% velocity: 5017.9 km/s Systemic velocity: 4855.0 km/s Line width (20%): 325.8 km/s Profile integral: 10.52 Jy * km/s A: 8.05 B: 10.68 Ratio B/A: 1.327 Flux integral velocity range: 4674.0 - 5035.9 km/s