Object: 1226+10 On scan num: 108 110 112 114 116 118 Off scan num: 109 111 113 115 117 119 R.A.: 12.489317 hrs Dec.: 9.988782 deg On azimuth: 134.355370 deg On zenith dist.: 36.460775 deg Off azimuth: 134.315089 deg Off zenith dist.: 36.477311 deg MJD: 52777 UTC: 0.015822 Center freq.: 1416.682251 MHz Doppler: -0.00007641 Num. correlators: 2 Spectrom. atten.: 28 33 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1680 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 4 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: 744.5 km/s Upper 20% velocity: 780.3 km/s Systemic velocity: 762.4 km/s Line width (20%): 35.8 km/s Profile integral: 0.20 Jy * km/s A: 0.25 B: 0.14 Ratio B/A: 0.550 Flux integral velocity range: 740.2 - 785.8 km/s