NGC1569 Scan 187


Observing log information

  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

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 6 60-second sub-integrations manually deleted because of interference or a bad baseline.

Figure 2. Edited spectrum