Object: N5990 On scan num: 316 318 320 Off scan num: 317 319 321 R.A.: 15.771138 hrs Dec.: 2.414831 deg On azimuth: 222.901533 deg On zenith dist.: 44.349014 deg Off azimuth: 222.866051 deg Off zenith dist.: 44.333267 deg MJD: 52265 UTC: 0.702778 Center freq.: 1402.664493 MHz Doppler: 0.00005644 Num. correlators: 2 Spectrom. atten.: 33 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 540 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 12 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 4th-order least squares fit baseline removed using most of the baseline shown in Figure 2. Narrow band interference was removed from 9 channels by interpolation between the nearest valid channels
Peak intensity: 0.029 Jy Lower 20% velocity: 3654.3 km/s Upper 20% velocity: 3971.1 km/s Systemic velocity: 3812.7 km/s Line width (20%): 316.8 km/s Profile integral: 3.58 Jy * km/s A: 4.54 B: 7.96 Ratio B/A: 1.755 Flux integral velocity range: 3620.8 - 4018.2 km/s
crummy baseline, very low SNR, edge locations are pure guesses