CIG874 Scan 77


Observing log information

  Object:           CIG874
  On scan num:      77 79 81 83 85 87
  Off scan num:     78 80 82 84 86 88
  R.A.:             19.711355 hrs
  Dec.:             71.408509 deg
  On azimuth:       342.684804 deg
  On zenith dist.:  63.092186 deg
  Off azimuth:      342.667797 deg
  Off zenith dist.: 63.075312 deg
  MJD:              52747
  UTC:              0.811100
  Center freq.:     1393.304823 MHz
  Doppler:          -0.00000399
  Num. correlators: 2
  Spectrom. atten.: 28 40 dB
  Bandwidth:        40.0 MHz
  Num. channels:    1024
  Eff. integration: 1740 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 2 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum