Object: LVM538. On scan num: 226 228 230 232 234 236 Off scan num: 227 229 231 233 235 237 R.A.: 12.586595 hrs Dec.: 72.232595 deg On azimuth: 7.442696 deg On zenith dist.: 34.409483 deg Off azimuth: 7.469846 deg Off zenith dist.: 34.414951 deg MJD: 52288 UTC: 0.389919 Center freq.: 1388.202066 MHz Doppler: 0.00001423 Num. correlators: 2 Spectrom. atten.: 33 40 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: 0.012 Jy Lower 20% velocity: 6806.1 km/s Upper 20% velocity: 7084.0 km/s Systemic velocity: 6945.0 km/s Line width (20%): 277.9 km/s Profile integral: 2.63 Jy * km/s A: 1.98 B: 2.69 Ratio B/A: 1.356 Flux integral velocity range: 6786.4 - 7103.5 km/s