Object: 1849+2334 On scan num: 361 363 365 Off scan num: 362 364 366 R.A.: 18.860534 hrs Dec.: 23.634307 deg On azimuth: 256.508797 deg On zenith dist.: 35.324499 deg Off azimuth: 256.475771 deg Off zenith dist.: 35.295447 deg MJD: 52265 UTC: 0.857326 Center freq.: 1399.151771 MHz Doppler: -0.00001986 Num. correlators: 2 Spectrom. atten.: 33 40 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.
Peak intensity: 0.012 Jy Lower 20% velocity: 4505.3 km/s Upper 20% velocity: 4655.7 km/s Systemic velocity: 4580.5 km/s Line width (20%): 150.5 km/s Profile integral: 1.34 Jy * km/s A: 0.64 B: 1.28 Ratio B/A: 2.015 Flux integral velocity range: 4484.4 - 4669.2 km/s