Object: N7469 On scan num: 117 119 121 123 125 127 Off scan num: 118 120 122 124 126 128 R.A.: 23.054401 hrs Dec.: 8.874192 deg On azimuth: 166.465723 deg On zenith dist.: 30.087936 deg Off azimuth: 166.440982 deg Off zenith dist.: 30.090130 deg MJD: 52456 UTC: 0.386053 Center freq.: 1397.909191 MHz Doppler: 0.00009002 Num. correlators: 2 Spectrom. atten.: 41 40 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: 0.010 Jy Lower 20% velocity: 4664.8 km/s Upper 20% velocity: 5050.4 km/s Systemic velocity: 4857.6 km/s Line width (20%): 385.6 km/s Profile integral: 2.09 Jy * km/s A: 2.23 B: 2.58 Ratio B/A: 1.158 Flux integral velocity range: 4643.2 - 5077.3 km/s
very poorly defined profile, could be two, edge locations only guesses