Object: LVM654. On scan num: 250 252 254 256 258 260 Off scan num: 251 253 255 257 259 261 R.A.: 14.891625 hrs Dec.: 70.464504 deg On azimuth: 9.575067 deg On zenith dist.: 32.979378 deg Off azimuth: 9.602840 deg Off zenith dist.: 32.986116 deg MJD: 52288 UTC: 0.480556 Center freq.: 1379.743686 MHz Doppler: 0.00001582 Num. correlators: 2 Spectrom. atten.: 33 40 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: 0.013 Jy Lower 20% velocity: 8687.6 km/s Upper 20% velocity: 9016.2 km/s Systemic velocity: 8851.9 km/s Line width (20%): 328.5 km/s Profile integral: 3.17 Jy * km/s A: 2.34 B: 3.18 Ratio B/A: 1.356 Flux integral velocity range: 8665.2 - 9036.6 km/s