Object: 0443+1823 On scan num: 420 422 424 Off scan num: 421 423 425 R.A.: 4.774791 hrs Dec.: 18.459408 deg On azimuth: 238.750201 deg On zenith dist.: 31.515921 deg Off azimuth: 238.717208 deg Off zenith dist.: 31.499170 deg MJD: 52260 UTC: 0.258657 Center freq.: 1398.838952 MHz Doppler: -0.00002335 Num. correlators: 2 Spectrom. atten.: 33 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 900 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 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 1.
Peak intensity: 0.021 Jy Lower 20% velocity: 4450.4 km/s Upper 20% velocity: 4857.6 km/s Systemic velocity: 4654.0 km/s Line width (20%): 407.1 km/s Profile integral: 5.92 Jy * km/s A: 4.66 B: 6.43 Ratio B/A: 1.381 Flux integral velocity range: 4428.2 - 4878.9 km/s
long, low-level shoulder in high velocity side included in profile width