Object: N00494 On scan num: 234 236 238 240 242 244 Off scan num: 235 237 239 241 243 245 R.A.: 1.382060 hrs Dec.: 33.173954 deg On azimuth: 263.537568 deg On zenith dist.: 21.245690 deg Off azimuth: 263.504865 deg Off zenith dist.: 21.216020 deg MJD: 52265 UTC: 0.096725 Center freq.: 1394.878671 MHz Doppler: -0.00007989 Num. correlators: 2 Spectrom. atten.: 34 40 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 1800 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 9 channels by interpolation between the nearest valid channels
Peak intensity: 0.004 Jy
Lower 20% velocity: 5191.0 km/s
Upper 20% velocity: 5711.5 km/s
Systemic velocity: 5451.3 km/s
Line width (20%): 520.6 km/s
Profile integral: 1.13 Jy * km/s
A: 1.00
B: 0.84
Ratio B/A: 0.847
Flux integral
velocity range: 5144.3 - 5736.3 km/s
extremely low SNR