Object: N6247 On scan num: 778 780 782 Off scan num: 779 781 783 R.A.: 16.805669 hrs Dec.: 62.976471 deg On azimuth: 331.444793 deg On zenith dist.: 63.920494 deg Off azimuth: 331.429351 deg Off zenith dist.: 63.899925 deg MJD: 52513 UTC: 0.291551 Center freq.: 1399.275631 MHz Doppler: -0.00001019 Num. correlators: 2 Spectrom. atten.: 37 42 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 third-order least squares fit baseline removed using most of the baseline shown in Figure 2.
Peak intensity: 0.015 Jy Lower 20% velocity: 4349.2 km/s Upper 20% velocity: 4687.0 km/s Systemic velocity: 4518.1 km/s Line width (20%): 337.8 km/s Profile integral: 3.49 Jy * km/s A: 2.72 B: 3.68 Ratio B/A: 1.357 Flux integral velocity range: 4322.4 - 4719.6 km/s