Object: U00809 On scan num: 469 471 473 475 477 Off scan num: 470 472 474 476 478 R.A.: 1.264446 hrs Dec.: 33.810029 deg On azimuth: 88.270704 deg On zenith dist.: 28.540113 deg Off azimuth: 88.246472 deg Off zenith dist.: 28.573287 deg MJD: 52279 UTC: 0.882523 Center freq.: 1400.611349 MHz Doppler: -0.00008844 Num. correlators: 2 Spectrom. atten.: 33 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1500 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 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 1. Narrow band interference was removed from 17 channels by interpolation between the nearest valid channels
Peak intensity: 0.021 Jy
Lower 20% velocity: 4041.6 km/s
Upper 20% velocity: 4384.0 km/s
Systemic velocity: 4212.8 km/s
Line width (20%): 342.4 km/s
Profile integral: 5.72 Jy * km/s
A: 3.83
B: 5.99
Ratio B/A: 1.564
Flux integral
velocity range: 4019.7 - 4411.9 km/s
a lot of RFI