Object: N4253 On scan num: 200 202 204 Off scan num: 201 203 205 R.A.: 12.307449 hrs Dec.: 29.812449 deg On azimuth: 90.282839 deg On zenith dist.: 36.409499 deg Off azimuth: 90.256639 deg Off zenith dist.: 36.442130 deg MJD: 52263 UTC: 0.365405 Center freq.: 1401.999079 MHz Doppler: 0.00008829 Num. correlators: 2 Spectrom. atten.: 33 38 dB Bandwidth: 10.0 MHz Num. channels: 1024 Eff. integration: 300 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 19 60-second sub-integrations manually deleted because of interference or a bad baseline.