Object: 14+08-6 On scan num: 16 18 20 22 24 26 Off scan num: 17 19 21 23 25 27 R.A.: 13.216354 hrs Dec.: 41.786333 deg On azimuth: 59.485334 deg On zenith dist.: 57.959263 deg Off azimuth: 59.466339 deg Off zenith dist.: 57.993033 deg MJD: 52553 UTC: 0.510613 Center freq.: 1418.545477 MHz Doppler: 0.00002280 Num. correlators: 2 Spectrom. atten.: 35 34 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1740 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 spectrum is the same as Figure 1 but with 2 60-second sub-integrations manually deleted because of interference or a bad baseline.
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 2.
Peak intensity: 0.011 Jy Lower 20% velocity: 512.6 km/s Upper 20% velocity: 569.6 km/s Systemic velocity: 541.1 km/s Line width (20%): 57.0 km/s Profile integral: 0.33 Jy * km/s A: 0.17 B: 0.54 Ratio B/A: 3.159 Flux integral velocity range: 509.6 - 571.6 km/s
some HI in the off?