Object: 0253+0029 On scan num: 568 570 572 Off scan num: 569 571 573 R.A.: 2.932602 hrs Dec.: 0.692428 deg On azimuth: 227.532197 deg On zenith dist.: 48.657596 deg Off azimuth: 227.499800 deg Off zenith dist.: 48.640643 deg MJD: 52267 UTC: 0.178252 Center freq.: 1400.854362 MHz Doppler: -0.00007615 Num. correlators: 2 Spectrom. atten.: 34 40 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.
Peak intensity: 0.008 Jy Lower 20% velocity: 3917.8 km/s Upper 20% velocity: 4310.1 km/s Systemic velocity: 4113.9 km/s Line width (20%): 392.2 km/s Profile integral: 2.38 Jy * km/s A: 1.51 B: 2.30 Ratio B/A: 1.521 Flux integral velocity range: 3894.5 - 4333.1 km/s
very low SNR