Object: N7769 On scan num: 129 131 133 Off scan num: 130 132 134 R.A.: 23.851035 hrs Dec.: 20.149416 deg On azimuth: 173.999483 deg On zenith dist.: 18.294503 deg Off azimuth: 174.023346 deg Off zenith dist.: 18.293795 deg MJD: 52456 UTC: 0.432535 Center freq.: 1400.891977 MHz Doppler: 0.00009216 Num. correlators: 2 Spectrom. atten.: 41 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 840 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: 0.039 Jy Lower 20% velocity: 4016.4 km/s Upper 20% velocity: 4419.2 km/s Systemic velocity: 4217.8 km/s Line width (20%): 402.8 km/s Profile integral: 11.55 Jy * km/s A: 12.29 B: 12.74 Ratio B/A: 1.036 Flux integral velocity range: 3962.2 - 4494.2 km/s
poor baseline, questionable flux density integral and profile edge locations