Object: 501-055 On scan num: 55 57 59 61 63 65 67 69 71 73 75 Off scan num: 56 58 60 62 64 66 68 70 72 74 76 R.A.: 0.967075 hrs Dec.: 30.705205 deg On azimuth: 284.626918 deg On zenith dist.: 56.041555 deg Off azimuth: 284.606193 deg Off zenith dist.: 56.009542 deg MJD: 52258 UTC: 0.219375 Center freq.: 1398.263688 MHz Doppler: -0.00007994 Num. correlators: 2 Spectrom. atten.: 33 39 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 3180 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 3 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: 0.005 Jy Lower 20% velocity: 4612.0 km/s Upper 20% velocity: 4834.3 km/s Systemic velocity: 4723.1 km/s Line width (20%): 222.3 km/s Profile integral: 0.97 Jy * km/s A: 0.69 B: 0.85 Ratio B/A: 1.244 Flux integral velocity range: 4595.8 - 4851.0 km/s
very low SNR