Object: LVM421. On scan num: 214 216 218 220 222 224 Off scan num: 215 217 219 221 223 225 R.A.: 10.520903 hrs Dec.: 72.126322 deg On azimuth: -0.430029 deg On zenith dist.: 33.584673 deg Off azimuth: -0.400356 deg Off zenith dist.: 33.584289 deg MJD: 52288 UTC: 0.344826 Center freq.: 1389.600176 MHz Doppler: 0.00000649 Num. correlators: 2 Spectrom. atten.: 33 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1800 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 4th-order least squares fit baseline removed using most of the baseline shown in Figure 1.
Peak intensity: 0.066 Jy Lower 20% velocity: 6542.5 km/s Upper 20% velocity: 6755.2 km/s Systemic velocity: 6648.9 km/s Line width (20%): 212.7 km/s Profile integral: 8.99 Jy * km/s A: 7.03 B: 8.71 Ratio B/A: 1.238 Flux integral velocity range: 6501.6 - 6788.0 km/s