Object: NGC1569 On scan num: 187 189 191 Off scan num: 188 190 192 R.A.: 4.513612 hrs Dec.: 64.848133 deg On azimuth: 327.536782 deg On zenith dist.: 50.636689 deg Off azimuth: 327.679442 deg Off zenith dist.: 51.320530 deg MJD: 52511 UTC: 0.697685 Center freq.: 1420.997924 MHz Doppler: 0.00006982 Num. correlators: 2 Spectrom. atten.: 38 42 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 600 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 6 60-second sub-integrations manually deleted because of interference or a bad baseline.