Object: N_834 On scan num: 634 636 638 Off scan num: 635 637 639 R.A.: 2.183732 hrs Dec.: 37.666447 deg On azimuth: 87.517498 deg On zenith dist.: 13.985189 deg Off azimuth: 87.495744 deg Off zenith dist.: 14.021375 deg MJD: 52498 UTC: 0.370995 Center freq.: 1399.282606 MHz Doppler: 0.00009007 Num. correlators: 2 Spectrom. atten.: 39 37 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 1 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: 0.020 Jy Lower 20% velocity: 4413.6 km/s Upper 20% velocity: 4756.7 km/s Systemic velocity: 4585.1 km/s Line width (20%): 343.1 km/s Profile integral: 4.86 Jy * km/s A: 4.21 B: 4.56 Ratio B/A: 1.085 Flux integral velocity range: 4391.3 - 4780.0 km/s