Object: 1240+03 On scan num: 315 317 319 321 323 Off scan num: 316 318 320 322 324 R.A.: 12.815898 hrs Dec.: 3.418102 deg On azimuth: 252.723535 deg On zenith dist.: 64.252542 deg Off azimuth: 254.706342 deg Off zenith dist.: 66.316694 deg MJD: 52485 UTC: 0.065428 Center freq.: 1415.777816 MHz Doppler: -0.00008729 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1440 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: 0.243 Jy Lower 20% velocity: 633.5 km/s Upper 20% velocity: 809.4 km/s Systemic velocity: 721.4 km/s Line width (20%): 175.9 km/s Profile integral: 35.52 Jy * km/s A: 31.27 B: 38.69 Ratio B/A: 1.237 Flux integral velocity range: 595.3 - 843.9 km/s