Object: SBS1211+540 On scan num: 216 218 220 222 224 226 Off scan num: 217 219 221 223 225 227 R.A.: 12.234014 hrs Dec.: 53.754945 deg On azimuth: 37.548489 deg On zenith dist.: 68.268958 deg Off azimuth: 37.526654 deg Off zenith dist.: 68.296671 deg MJD: 52617 UTC: 0.217558 Center freq.: 1416.213631 MHz Doppler: 0.00006511 Num. correlators: 2 Spectrom. atten.: 38 40 dB Bandwidth: 5.0 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 second-order least squares fit baseline removed using most of the baseline shown in Figure 1.
Peak intensity: 0.021 Jy Lower 20% velocity: 871.3 km/s Upper 20% velocity: 928.8 km/s Systemic velocity: 900.1 km/s Line width (20%): 57.5 km/s Profile integral: 0.82 Jy * km/s A: 0.73 B: 0.87 Ratio B/A: 1.185 Flux integral velocity range: 860.3 - 940.1 km/s