Object: U00575 On scan num: 2402 2404 2406 2408 2410 2412 Off scan num: 2403 2405 2407 2409 2411 2413 R.A.: 0.935997 hrs Dec.: 31.075206 deg On azimuth: 281.066348 deg On zenith dist.: 49.691454 deg Off azimuth: 281.047422 deg Off zenith dist.: 49.662182 deg MJD: 52255 UTC: 0.203843 Center freq.: 1398.547898 MHz Doppler: -0.00007705 Num. correlators: 2 Spectrom. atten.: 34 39 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1620 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 5 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: 0.009 Jy Lower 20% velocity: 4504.8 km/s Upper 20% velocity: 4810.6 km/s Systemic velocity: 4657.7 km/s Line width (20%): 305.8 km/s Profile integral: 2.20 Jy * km/s A: 1.94 B: 1.96 Ratio B/A: 1.012 Flux integral velocity range: 4492.4 - 4817.6 km/s