N4253 Scan 200

Contents

Observing log information

  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

Raw spectrum

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

Figure 1. Unedited spectrum

Edited spectrum

This spectrum is the same as Figure 1 but with 19 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum