Object: U7370 On scan num: 367 369 371 374 376 378 380 Off scan num: 368 370 372 375 377 379 381 R.A.: 12.327869 hrs Dec.: 2.080295 deg On azimuth: 153.887313 deg On zenith dist.: 39.178123 deg Off azimuth: 153.849510 deg Off zenith dist.: 39.187114 deg MJD: 52771 UTC: 0.051620 Center freq.: 1409.832339 MHz Doppler: -0.00007081 Num. correlators: 2 Spectrom. atten.: 0 0 dB Bandwidth: 12.5 MHz Num. channels: 8192 Eff. integration: 2100 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: 0.017 Jy Lower 20% velocity: 2110.7 km/s Upper 20% velocity: 2305.9 km/s Systemic velocity: 2208.3 km/s Line width (20%): 195.3 km/s Profile integral: 2.83 Jy * km/s A: 2.71 B: 2.95 Ratio B/A: 1.089 Flux integral velocity range: 2097.8 - 2318.1 km/s