Object: N5183 On scan num: 111 113 115 119 121 Off scan num: 112 114 116 120 122 R.A.: 13.501774 hrs Dec.: -1.720686 deg On azimuth: 123.585209 deg On zenith dist.: 57.267113 deg Off azimuth: 123.555847 deg Off zenith dist.: 57.288223 deg MJD: 52256 UTC: 0.430590 Center freq.: 1400.471276 MHz Doppler: 0.00008783 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1260 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 7 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. Narrow band interference was removed from 15 channels by interpolation between the nearest valid channels
Peak intensity: 0.096 Jy Lower 20% velocity: 3816.8 km/s Upper 20% velocity: 4488.3 km/s Systemic velocity: 4152.6 km/s Line width (20%): 671.5 km/s Profile integral: 30.46 Jy * km/s A: 24.01 B: 30.09 Ratio B/A: 1.253 Flux integral velocity range: 3783.5 - 4518.5 km/s
looks like at least two blended profiles