Object: N_877 On scan num: 960 962 964 Off scan num: 961 963 965 R.A.: 2.299620 hrs Dec.: 14.540600 deg On azimuth: 219.306085 deg On zenith dist.: 28.832412 deg Off azimuth: 219.276294 deg Off zenith dist.: 28.823958 deg MJD: 52284 UTC: 0.063299 Center freq.: 1401.886454 MHz Doppler: -0.00009664 Num. correlators: 2 Spectrom. atten.: 33 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 900 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 8 channels by interpolation between the nearest valid channels
Peak intensity: 0.102 Jy
Lower 20% velocity: 3663.7 km/s
Upper 20% velocity: 4139.5 km/s
Systemic velocity: 3901.6 km/s
Line width (20%): 475.8 km/s
Profile integral: 37.59 Jy * km/s
A: 29.79
B: 37.19
Ratio B/A: 1.248
Flux integral
velocity range: 3529.9 - 4196.1 km/s
extended low level wing on low velocity side