Object: I_357 On scan num: 194 196 198 Off scan num: 195 197 199 R.A.: 4.062250 hrs Dec.: 22.158244 deg On azimuth: 275.446178 deg On zenith dist.: 59.687205 deg Off azimuth: 275.419188 deg Off zenith dist.: 59.651418 deg MJD: 52263 UTC: 0.331863 Center freq.: 1390.893470 MHz Doppler: -0.00004446 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 900 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: 0.058 Jy Lower 20% velocity: 6167.2 km/s Upper 20% velocity: 6421.0 km/s Systemic velocity: 6294.1 km/s Line width (20%): 253.7 km/s Profile integral: 10.89 Jy * km/s A: 8.91 B: 11.50 Ratio B/A: 1.291 Flux integral velocity range: 6094.3 - 6655.4 km/s
very long wing extending to about 6600 km/s, 20 percent edge very poorly defined