Object: U01251 On scan num: 604 606 608 610 612 614 Off scan num: 605 607 609 611 613 615 R.A.: 1.791744 hrs Dec.: 36.035925 deg On azimuth: 76.405770 deg On zenith dist.: 41.191153 deg Off azimuth: 76.386896 deg Off zenith dist.: 41.226429 deg MJD: 52498 UTC: 0.258611 Center freq.: 1397.921630 MHz Doppler: 0.00008908 Num. correlators: 2 Spectrom. atten.: 39 37 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1740 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.
Peak intensity: 0.010 Jy Lower 20% velocity: 4677.1 km/s Upper 20% velocity: 5001.1 km/s Systemic velocity: 4839.1 km/s Line width (20%): 324.0 km/s Profile integral: 1.90 Jy * km/s A: 1.74 B: 1.98 Ratio B/A: 1.136 Flux integral velocity range: 4657.2 - 5021.0 km/s