Object: UGC5172 On scan num: 616 Off scan num: 617 R.A.: 9.697822 hrs Dec.: 48.670504 deg On azimuth: 57.030727 deg On zenith dist.: 39.135719 deg Off azimuth: 56.952119 deg Off zenith dist.: 39.635231 deg MJD: 52242 UTC: 0.286030 Center freq.: 1408.327777 MHz Doppler: 0.00007585 Num. correlators: 2 Spectrom. atten.: 31 38 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 300 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 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 1.
Peak intensity: 0.086 Jy Lower 20% velocity: 2558.3 km/s Upper 20% velocity: 2632.3 km/s Systemic velocity: 2595.3 km/s Line width (20%): 74.1 km/s Profile integral: 5.55 Jy * km/s A: 4.36 B: 5.30 Ratio B/A: 1.216 Flux integral velocity range: 2551.9 - 2639.9 km/s