Object: NGC2366 On scan num: 4931 4933 4935 Off scan num: 4932 4934 4936 R.A.: 7.481611 hrs Dec.: 69.215029 deg On azimuth: 355.401053 deg On zenith dist.: 30.905960 deg Off azimuth: 355.434753 deg Off zenith dist.: 30.902527 deg MJD: 52545 UTC: 0.530602 Center freq.: 1420.028359 MHz Doppler: 0.00006774 Num. correlators: 2 Spectrom. atten.: 35 34 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 840 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: 2.308 Jy Lower 20% velocity: 45.0 km/s Upper 20% velocity: 157.6 km/s Systemic velocity: 101.3 km/s Line width (20%): 112.6 km/s Profile integral: 210.46 Jy * km/s A: 194.77 B: 210.88 Ratio B/A: 1.083 Flux integral velocity range: 23.7 - 182.5 km/s