Object: IC1669 On scan num: 574 576 578 580 582 584 Off scan num: 575 577 579 581 583 585 R.A.: 1.335258 hrs Dec.: 33.185450 deg On azimuth: 285.957088 deg On zenith dist.: 52.708780 deg Off azimuth: 285.937562 deg Off zenith dist.: 52.677115 deg MJD: 52267 UTC: 0.202014 Center freq.: 1393.710860 MHz Doppler: -0.00008243 Num. correlators: 2 Spectrom. atten.: 34 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: 0.006 Jy Lower 20% velocity: 5574.5 km/s Upper 20% velocity: 5856.0 km/s Systemic velocity: 5715.2 km/s Line width (20%): 281.6 km/s Profile integral: 1.15 Jy * km/s A: 1.65 B: 1.32 Ratio B/A: 0.799 Flux integral velocity range: 5554.9 - 5878.1 km/s
curved baseline, marginal detection, edge locations are pure guesses