Object: F1250-988 On scan num: 326 328 330 332 334 336 Off scan num: 327 329 331 333 335 337 R.A.: 12.897006 hrs Dec.: 28.942570 deg On azimuth: 284.928159 deg On zenith dist.: 60.152047 deg Off azimuth: 284.902710 deg Off zenith dist.: 60.113895 deg MJD: 52485 UTC: 0.107164 Center freq.: 1387.257021 MHz Doppler: -0.00006711 Num. correlators: 2 Spectrom. atten.: 35 42 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: 0.006 Jy Lower 20% velocity: 7778.8 km/s Upper 20% velocity: 8113.9 km/s Systemic velocity: 7946.3 km/s Line width (20%): 335.2 km/s Profile integral: 1.36 Jy * km/s A: 1.47 B: 1.57 Ratio B/A: 1.067 Flux integral velocity range: 7760.6 - 8132.0 km/s