Object: NGC1385 On scan num: 183 185 187 Off scan num: 184 186 188 R.A.: 3.624511 hrs Dec.: -24.501044 deg On azimuth: 196.041800 deg On zenith dist.: 64.565861 deg Off azimuth: 196.004740 deg Off zenith dist.: 64.558407 deg MJD: 52421 UTC: 0.734572 Center freq.: 1413.404257 MHz Doppler: 0.00002630 Num. correlators: 2 Spectrom. atten.: 35 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 840 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 2 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: 0.170 Jy Lower 20% velocity: 1393.1 km/s Upper 20% velocity: 1612.1 km/s Systemic velocity: 1502.6 km/s Line width (20%): 219.0 km/s Profile integral: 30.38 Jy * km/s A: 27.71 B: 31.13 Ratio B/A: 1.123 Flux integral velocity range: 1355.6 - 1649.2 km/s