Object: 1209+13 On scan num: 38 40 42 44 46 48 Off scan num: 39 41 43 45 47 49 R.A.: 12.201187 hrs Dec.: 12.740312 deg On azimuth: 224.832462 deg On zenith dist.: 32.807628 deg Off azimuth: 224.815582 deg Off zenith dist.: 32.809328 deg MJD: 52482 UTC: 0.944317 Center freq.: 1409.936738 MHz Doppler: -0.00007623 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: 0.009 Jy Lower 20% velocity: 2175.7 km/s Upper 20% velocity: 2225.2 km/s Systemic velocity: 2200.4 km/s Line width (20%): 49.6 km/s Profile integral: 0.35 Jy * km/s A: 0.30 B: 0.28 Ratio B/A: 0.936 Flux integral velocity range: 2171.8 - 2228.3 km/s