Object: Arp098 On scan num: 54 56 58 60 62 64 Off scan num: 55 57 59 61 63 65 R.A.: 1.535700 hrs Dec.: 32.103325 deg On azimuth: 248.121829 deg On zenith dist.: 14.102428 deg Off azimuth: 248.090235 deg Off zenith dist.: 14.089920 deg MJD: 52603 UTC: 0.149699 Center freq.: 1363.230292 MHz Doppler: -0.00004692 Num. correlators: 2 Spectrom. atten.: 38 38 dB Bandwidth: 5.0 MHz Num. channels: 1024 Eff. integration: 1560 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 7 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: 0.007 Jy Lower 20% velocity: 12258.3 km/s Upper 20% velocity: 12502.5 km/s Systemic velocity: 12380.4 km/s Line width (20%): 244.2 km/s Profile integral: 1.25 Jy * km/s A: 1.11 B: 1.62 Ratio B/A: 1.459 Flux integral velocity range: 12251.1 - 12509.2 km/s