Object: LVM172. On scan num: 540 542 544 546 548 550 Off scan num: 541 543 545 547 549 551 R.A.: 6.762848 hrs Dec.: 46.049314 deg On azimuth: 306.479837 deg On zenith dist.: 58.825033 deg Off azimuth: 306.463731 deg Off zenith dist.: 58.796003 deg MJD: 52293 UTC: 0.402338 Center freq.: 1391.998140 MHz Doppler: -0.00003306 Num. correlators: 2 Spectrom. atten.: 34 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1620 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 5 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: 5973.7 km/s Upper 20% velocity: 6326.5 km/s Systemic velocity: 6150.1 km/s Line width (20%): 352.8 km/s Profile integral: 2.13 Jy * km/s A: 1.65 B: 2.35 Ratio B/A: 1.426 Flux integral velocity range: 5960.2 - 6344.5 km/s